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March 2015
Rev A
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BODY BUILDER MANUAL CONTENTSSECTION 1: INTRODUCTION
SECTION 2: SAFETY AND COMPLIANCE
SAFETY SIGNALS vi
FEDERAL MOTOR VEHICLE SAFETY STANDARDS (FMVSS) ANDCANADIAN MOTORVEHICLE SAFETY STANDARDS (CMVSS) COMPLIANCE viiNOISE AND EMISSIONSREQUIREMENTS viii
SECTION 3: DIMENSIONS
INTRODUCTION 3-1ABBREVIATIONS 3-1OVERALL DIMENSIONS 3-2
Model 389-131 3-3Model 389-123 3-4Model 386 3-5Model 3843-6Model 367 SFFA 3-7
Model 367 SBFA 3-8Model 367 SBFA HH 3-9Model 367 SBFA HH FEPTO3-10Model 365 SFFA 3-11Model 365 SBFA 3-12Model 365 SBFA FEPTO3-13Model 579-123 3-14Model 579-117 3-15Model 567-121 3-16Model567-115 3-17
UNIBILT SLEEPERS 3-18CONVENTIONAL CAB 3-19EXTENDED CAB 3-20
FRAME RAILS 3-21FRAME HEIGHT CHARTS 3-22FRONT DRIVE AXLE, PTO’SAND AUXILIARY TRANSMISSIONS 3-28
Examples 3-28Guppy Outserts 3-31
EXHAUST HEIGHT CALCULATIONS 3-35GROUND CLEARANCE CALCULATIONS3-36OVERALL CAB HEIGHT CALCULATIONS 3-37FRAME COMPONENTS 3-38
Fuel Tanks 3-38DEF Tanks 3-39
EXHAUST SYSTEMS 3-40Exhaust Single RH Side of Cab DPF/SCR RHUnder Cab 3-40Exhaust Dual Side of Cab DPF/SCR RH Under Cab3-41Exhaust Single RH Back of Cab DPF/SCR RH Under Cab 3-42ExhaustSingle Horizontal DPF/SCR RH Under Cab 3-43Exhaust Single RH Backof Sleeper DPF/SCR RH Under Cab 3-44Exhaust Dual Back of SleeperDPF/SCR RH Under Cab 3-45Exhaust Single RH Back of Sleeper DPF/SCRCross Over Under Cab 3-46Exhaust Dual Back of Sleeper DPF/SCR CrossOver Under Cab 3-47Exhaust Single Horizontal DPF/SCR Cross OverUnder Cab 3-48Exhaust Single LH Back of Sleeper DPF/SCRVertical–Day Cab 3-49Exhaust Single LH Back of SleeperDPF/SCR Vertical–36” Sleeper 3-50ExhaustSingle RH Side of Cab ISL-G Only 3-51Exhaust Single RH Back of CabISL-G Only 3-52Exhaust Single Horizontal ISL-G or ISL12-G Only3-53
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TABLE OF CONTENTS
Peterbilt Motors Company ii
Exhaust Single Vertical ISL-G or ISL12-G Only 3-54PTOCLEARANCES 3-55
SECTION 4: BODY MOUNTING
INTRODUCTION 4-1FRAME RAILS 4-1
CRITICAL CLEARANCES 4-2BODY MOUNTING USING BRACKETS 4-3
Brackets 4-4Mounting Holes 4-5Frame Drilling 4-6
BODY MOUNTING USING U–BOLTS 4-7Rear Body Mount 4-9
SECTION 5: FRAME MODIFICATIONS
INTRODUCTION 5-1DRILLING RAILS 5-1MODIFYING FRAME LENGTH5-1CHANGING WHEELBASE 5-1
CROSSMEMBERS 5-2TORQUE REQUIREMENTS 5-3WELDING 5-3
SECTION 6: ELECTRICAL 389 FAMILY
CONTROL UNIT IDENTIFICATION 6-1FunctionalDescription-Instrumentation Control Unit / 6-1Cab ElectronicControl Unit (ICU/CECU) 6-1Electronic Service Agent (ESA)6-2Models–Build Dates Identification 6-2Identification6-2
HOW MULTIPLEXED INSTRUMENTS WORK 6-6Introduction 6-6
Central Instrument Cluster 6-7ICU/CECU Architecture 6-9Power OnSelf-Test 6-10Commercial Vehicle Smart Gauges (CVSG)6-10Instruments and Controls Operation 6-11
TRANSMISSION BACK UP SIGNALS 6-14JUNCTION BOX 6-14J1939 6-15
SECTION 7: ELECTRICAL 579 FAMILY
INTRODUCTION 7-1BODY BUILDER CONNECTION POINTS 7-2
Harness Design 7-2
Remote Throttle and Remote PTO Control 7-2Spare Power 7-2AirSolenoid 7-2Cab Switch Backlighting 7-2Electric Engaged Equipment7-3Air Solenoid Bank and Chassis Node 7-3Rear Axle Controls andSensors 7-4Location Diagrams for Various Connectors on the Frame7-5
INSTALLING ADDITIONAL SWITCHES ONTO THE CHASSIS 7-10INSTALLINGADDITIONAL GAUGES ON THE DASH 7-11
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TABLE OF CONTENTS
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INSTALLING SENSORS ON THE CHASSIS FOR GAUGES 7-12LIFT AXLES(PUSHERS & TAG) 7-14
Truck Lift Axles 7-14Trailer Lift Axles 7-15
AIR SOLENOIDS 7-16REMOTE THROTTLE 7-17
CAB ECU PARAMETER REFERENCE TABLE 7-19INTERLOCK PROGRAMMINGDETAILS 7-20TRANSMISSION BACK UP SIGNALS 7-24JUNCTION BOX 7-24SNOWPLOW LIGHTING 7-25J1939 7-26HOW DO I... 7-28
Install a Multiplexed Instrument 7-28Install and Air OperatedExternal Device 7-28Re-Program the CECU 7-28Install New TelltaleIcons into the Instrument Cluster 7-28Access the Solenoid Bank andChassis Node 7-29Get the Air Bags to Deflate When the PTO is on7-29
DASH 7-30Gauge and Switch Installation 7-30Telltale IconsInstallation 7-33
SECTION 8: PTO SECTION
INTRODUCTION 8-1TRANSMISSION MOUTED PTO–GENERAL8-1TRANSMISSION MOUNTED PTO–579 FAMILY 8-3TRANSMISSIONCLEARANCE CHARTS–579 FAMILY 8-4HYDRAULIC CLUTCHACTUATOR CONFIGURATIONS 8-6FRONT ENGINE PTO 8-7REAR ENGINE PTO8-8PTO INSTALLATIONS–389 FAMILY 8-9PTOINSTALLATIONS–579 FAMILY 8-12
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Peterbilt Motors Company v
SECTION 1INTRODUCTION
The Peterbilt Heavy Duty Body Builder Manual was designed toprovide body builders with a comprehensive informationset to guidethe body planning and installation process. Use this informationwhen installing bodies or other associatedequipment.
In this manual you will find appropriate dimensionalinformation, guidelines for mounting bodies, modifyingframes,electrical wiring configurations, as well as otherinformation useful in the body installation process.
The Peterbilt Heavy Duty Body Builder Manual can be very usefulwhen specifying a vehicle, particularly when the bodybuilder isinvolved in the vehicle selection and component ordering process.Information in this manual will help reduceoverall costs throughoptimized integration of the body installation with vehicleselection.
As products continually evolve, Peterbilt reserves the right tochange specifications or products at any time without priornotice.It is the responsibility of the user to ensure that he is workingwith the latest released information. If you requireadditionalinformation or reference materials, please contact your localPeterbilt dealer.
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2SAFETY AND COMPLIANCE
Peterbilt Motors Company v
SECTION 2 SAFETY AND COMPLIANCESAFETY SIGNALS
A number of alerting messages are shown in this book. Pleaseread and follow them. They are there for your protectionandinformation. These alerting messages can help you avoid injury toyourself or others and help prevent costly damageto thevehicle.
Key symbols and “signal words” are used to indicate what kind ofmessage is going to follow. Pay special attention tocommentsprefaced by “WARNING”, “CAUTION”, and “NOTE.” Please don't ignoreany of these alerts.
WARNING
When you see this word and symbol, the message that follows isespecially vital. It signals a potentiallyhazardous situationwhich, if not avoided, could result in death or serious injury.This message will tell you whatthe hazard is, what can happen ifyou don’t heed the warning , and how to avoid it.
Example:
WARNING! Be sure to use a circuit breaker designed to meetliftgate amperage requirements. An incorrectlyspecified circuitbreaker could result in an electrical overload or fire situation.Follow the liftgate installationinstructions and use a circuitbreaker with the recommended capacity.
CAUTION
Signals a potentially hazardous situation which, if not avoided,could result in minor or moderate injury ordamage to thevehicle.
Example:
CAUTION: Never use a torch to make a hole in the rail. Use theappropriate drill bit.
NOTE
Provides general information: for example, the note could warnyou on how to avoid damaging your vehicle orhow to drive thevehicle more efficiently.
Example:
NOTE: Be sure to provide maintenance access to the battery boxand fuel tank fill neck.Please take the time to read these messageswhen you see them, and remember:
WARNING Indicates a potentially hazardous situation which, ifnot avoided, could result in death or serious injury.
CAUTION Signals a potentially hazardous situation which, if notavoided, could result in minor or moderate injury ordamage to thevehicle.
NOTE Useful information that is related to the topic beingdiscussed.
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2SAFETY AND COMPLIANCE
Peterbilt Motors Company vi
FEDERAL MOTOR VEHICLE SAFETY STANDARDS (FMVSS) AND CANADIANMOTORVEHICLE SAFETY STANDARDS (CMVSS) COMPLIANCE
As an Original Equipment Manufacturer (OEM), Peterbilt MotorsCompany ensures that our products comply with alapplicable FederalMotor Vehicle Safety Standards (FMVSS) and Canadian Motor VehicleSafety Standards (CMVSS)
where applicable. However, the fact that this vehicle has nofifth–wheel and that a Body Builder (Final StageManufacturer)will be doing additional modifications means that the vehicle wasincomplete when it left the build plant.
Incomplete Vehicle Certification
An Incomplete Vehicle Document is shipped with the vehicle,certifying that the vehicle is not complete (see figure below)Inaddition, affixed to the driver’s sidedoor frame or edge isan Incomplete Vehicle Certification label.
NOTE: These documents list the FMVSS (or CMVSS) regulations thatthe vehicle complied with when ileft the build plant. You should beaware that if you modify or alter any of the components orsystemscovered by these FMVSS (or CMVSS) regulations, it is yourresponsibility as the Final StageManufacturer to ensure that thecomplete vehicle maintains compliance with the particular FMVSS(orCMVSS) regulations when you complete your modifications.
Figure 2-1. Incomplete Vehicle Certification DocumentFigure 2-2. Location of Certification Labels -Driver’s DoorFrame
As the Final Stage Manufacturer, you should retain theIncomplete Vehicle Document for your records. In addition,youshould record and retain the manufacturer and serial number ofthe tires on the vehicle. Upon completion of thevehicle(installation of the body and any other modifications), youshould affix your certification label to the vehicle as requiredbyFederal law. This tag identifies you as the “Final StageManufacturer” and certifies that the vehicle complies withFederaMotor Vehicle Safety Standards.
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2SAFETY AND COMPLIANCE
Peterbilt Motors Company vii
Trucks equipped with a “Vehicle Emission Control Information”door label are certified to comply w ith United StatesGreenhouseGas (GHG) regulations. Original tires may be substituted providedthe new tires possess an equal to or loweCoefficient of rollingresistance (Crr).
The Emission Controls shown in Figure 2-3may be indicatedon the label.
Figure 2-3. Incomplete Vehicle Certification Document
Noise and Emissions Requirements
NOTE: This truck may be equipped with a Diesel ParticulateFilter (DPF) muffler unit in order to meet
both noise and exhaust emissions requirements. Removal ortampering with the DPF muffler will not
improve engine performance. Also tampering with the exhaustsystem is against the rules that are
established by the U.S. Code of Federal Regulations andEnvironment Canada Regulations. TheDPF muffler may only be replacedwith an approved part.
NOTE: 2007/10/13 emissions engines are integrated withparticulate filters for 2007/10/13 EPAcertification. Theparticulate filter assembly may consist of one or more of thefollowing components: adiesel oxidation catalyst, a dieselparticulate filter, temperature sensors, differential pressuresensor, andexhaust silencing components integrated into a modularhousing. Body Builders must not modify orrelocate this assembly orany components associated with it. It is also the case that thereshould not beany modifications made to the exhaust piping fromturbo outlet to aftertreatment inlet.
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3DIMENSIONS
Peterbilt Motors Company 3- 2
OVERALL DIMENSIONS
This section includes drawings and charts of the followingPeterbilt Models: 389, 386, 384, 367 SFFA, 367 SBFA, 367 HH367FEPTO, 365 SFFA, 365 SBFA, 365 FEPTO, 567 and 579. The ExtendedRear Window, Extended Cab and Unibilsleepers are also included.
On the pages that follow, detail drawings show particular viewsof each vehicle; all dimensions are in inches (in). Theyillustrateimportant measurements critical to designing bodies of all types.See the “Contents” at the beginning of themanual to locate thedrawing that you need.
All heights are given from the bottom of the frame rail.
Peterbilt also offers .dxf files and frame layouts of orderedchassis prior to build. Please speak with your local dealershiptorequest this feature when specifying your chassis.
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3DIMENSIONS
Peterbilt Motors Company 3- 3
MODEL 389-131
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER3)
DIMENSION IS 16.1” WITH 11-5/8” RAIL
4)
DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS19.6”5) DIMENSION FRONT OF BUMPER TO FRONT OF FRAME(BFF) IS 11.4”
FIGURE 3-1. Model 389-131 Top & LH View–OverallDimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 4
MODEL 388-123
NOTES:1)
DIMENSIONS ARE FOR REFERENCE ONLY2) DIMENSIONS ARE TOFRONT OF 0.25” THICK BUMPER3) DIMENSION FRONT AXLE TOFRONT OF FRAME (FFA) IS 19.6”4) DIMENSION FRONT OFBUMPER TO FRONT OF FRAME (BFF) IS 11.4”
FIGURE 3-2. Model 389-123 Top & LH View–OverallDimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 5
MODEL 386
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF BUMPER3) DIMENSION FRONT AXLE TOFRONT OF FRAME (FFA) IS 35.6”4) DIMENSION FRONT OFBUMPER TO FRONT OF FRAME (BFF) IS 14.0”
FIGURE 3-3. Model 386 Top & LH View–OverallDimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 6
MODEL 384
NOTES:1)
DIMENSIONS ARE FOR REFERENCE ONLY2) DIMENSIONS ARE TOFRONT OF BUMPER3) DIMENSION FRONT AXLE TO FRONT OF FRAME(FFA) IS 35.6”4) DIMENSION FRONT OF BUMPER TO FRONT OFFRAME (BFF) IS 12.0”
FIGURE 3-4. Model 384 Top & LH View–OverallDimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 7
Model 367SFFA
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER3)DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS 19.6”4)DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.4”
FIGURE 3-5. Model 367 SFFA Top & LH View–OverallDimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 8
Model 367SBFA Sloped Hood
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER3)DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS 35.6”4)DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.4”
FIGURE 3-6. Model 367 SBFA Sloped Hood Top & LHView–Overall Dimensions
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3DIMENSIONS
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Model 367SBFA HH
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER3)DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS 35.6”4)DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.4”
FIGURE 3-7. Model 367 SBFA Heavy Haul Hood Top & LH View–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 10
Model 367SBFA HH FEPTO
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER
3) AVAILABLE IN 22.4” OR 31” FEPTO AND WITHOUT FEPTO(31” FEPTO SHOWN)
FIGURE 3-8. Model 367 SBFA FEPTO Heavy Haul Hood Top & LHView –Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 11
Model 365SFFA
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER3)DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS 17.6”4)DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.4”
FIGURE 3-9. Model 365 SFFA Top & LH View–OverallDimensions
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3DIMENSIONS
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Model 365SBFA
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF 0.25” THICK BUMPER3)DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS 35.6”4)DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.4”
FIGURE 3-10. Model 365 SBFA Top & LHView–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 13
Model 365SBFA FEPTO
NOTES:
1)
DIMENSIONS ARE FOR REFERENCE ONLY2) DIMENSIONS ARE TOFRONT OF 0.25” THICK BUMPER
3) AVAILABLE IN 22.4” OR 31” FEPTO AND WITHOUT FEPTO(31” FEPTO SHOWN)
4) ADD 4” OVERALL CAB HEIGHT FOR FULL PROFILE HEIGHTFRAME RAILS (85.5”)
FIGURE 3-11. Model 365 SBFA FEPTO Hood Top & LHView–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 14
Model 579-123
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)
DIMENSIONS ARE TO FRONT OF BUMPER
3) DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS35.6”
4)
DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS13.8”
FIGURE 3-12. Model 579-123 SBFA Top & LHView–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 15
Model 579-117
NOTES:1)
DIMENSIONS ARE FOR REFERENCE ONLY2) DIMENSIONS ARE TOFRONT OF BUMPER
3) DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS35.6”
4) DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS13.8”
FIGURE 3-13. Model 579-117 SBFA Top & LHView–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 16
Model 567-121
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)DIMENSIONS ARE TO FRONT OF BUMPER
3) DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS35.6”
4) DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.3”
FIGURE 3-14. Model 567-121 SBFA Top & LHView–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 17
Model 567-115
NOTES:1) DIMENSIONS ARE FOR REFERENCE ONLY2)
DIMENSIONS ARE TO FRONT OF BUMPER
3) DIMENSION FRONT AXLE TO FRONT OF FRAME (FFA) IS35.6”
4) DIMENSION FRONT OF BUMPER TO FRONT OF FRAME (BFF) IS11.3”
FIGURE 3-15. Model 567-115 SBFA Top & LHView–Overall Dimensions
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3DIMENSIONS
Peterbilt Motors Company 3- 19
CAB –1.9 m CAB FAMILYModels 389, 388, 386, 384, 367,365
FIGURE 3-17.Cab Dimensions 1.9 m Cab Family
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3DIMENSIONS
Peterbilt Motors Company 3- 20
EXTENDED CAB –1.9 m CAB FAMILYModels 389, 388, 386,384, 367, 365
FIGURE 3-18.Extended Cab
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3DIMENSIONS
Peterbilt Motors Company 3- 21
FRAME RAILS
Frame rail configurations are shown in FIGURE 3-19. Frameheight, flange and structural values can be found in theBodyMounting Section.
FIGURE 3-19. Frame Rail Configurations
NOTE: The outserted frame section does not extend through therear suspension area.
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3DIMENSIONS
Peterbilt Motors Company 3- 22
FRAME HEIGHT CHARTS
FIGURE 3-20.Frame Height
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3DIMENSIONS
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TABLE 3-3.Front Frame Height “A” - SFFA
SFFA SUSPENSIONSPACER
(mm) LIGHT LOADED
12,000 lbs.3 TAPERLEAF SFFA
10 9.3 8.9
20 9.7 9.3
30 10.1 9.7
40 10.5 10.1
50 10.9 10.5
60 11.3 10.9
70 11.7 11.2
80 12.1 11.6
13,200 lbs.3 TAPERLEAF SFFA
10 9.3 8.9
20 9.7 9.3
30 10.1 9.7
40 10.5 10.1
50 10.9 10.5
60 11.3 10.9
70 11.7 11.3
80 12.1 11.5
14,600 lbs. TAPERLEAF SFFA
10 9.3 8.9
20 9.7 9.330 10.1 9.7
40 10.5 10.1
50 10.9 10.5
60 11.3 10.9
70 11.7 11.3
80 12.1 11.7
16,000 lbs. TAPERLEAF SFFA
10 10.5 10.0
20 10.9 10.3
30 11.3 10.7
40 11.7 11.1
50 12.1 11.5
60 12.5 11.9
70 12.9 12.3
80 13.3 12.7
18,000 - 20,000 lbs.1 TAPERLEAF SFFA
10 10.6 9.5
20 11.0 10.0
30 11.4 10.4
40 11.8 10.8
50 12.2 11.2
60 12.6 11.6
70 13.0 12.0
80 13.4 12.4
22,000 - 24,000 lbs.2 TAPERLEAF SFFA
10 12.4 10.9
20 12.8 11.3
30 13.2 11.7
40 13.6 12.1
50 14.0 12.5
60 14.3 12.9
70 14.7 13.380 15.1 13.6
NOTES:1) Shown with 20K load for laden dim. Add 0.3" toladen dim. if 18K load.2) Shown with 23K load for laden dim.Add 0.1" to laden dim. if 22K load. Subtract .01" from unladen dimif 24K load
Note: Standard 3-1/2" drop axle heights shown, for 5" dropaxles, subtract an additional 1-1/2".Spacer blocks are used byEngineering to obtain level frame and are not options."A" dimensionshown is to bottom of frame rail. Add frame rail height dimensionfor frame height.
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3DIMENSIONS
Peterbilt Motors Company 3- 24
TABLE 3-4.Front Frame Height “A” - SBFA
SBFA SUSPENSIONSPACER
(mm)LIGHT (in.) LOADED (in.)
12,000 lbs. TAPERLEAF SBFA
30 9.7 8.5
40 10.1 8.9
50 10.5 9.3
60 10.9 9.7
70 11.3 10.1
80 11.7 10.5
13,200 lbs. TAPERLEAF SBFA
30 9.8 8.5
40 10.2 8.9
50 10.6 9.3
60 11 9.7
70 11.4 10.1
80 11.8 10.5
14,600 lbs. TAPERLEAF SBFA
30 10.1 8.540 10.5 8.9
50 10.9 9.3
60 11.3 9.7
70 11.7 10.1
80 12.1 10.5
16,000 lbs. TAPERLEAF SBFA
30 3 11.4 9.5
40 3 11.8 9.9
50 12.2 10.3
60 12.6 10.7
70 13 11.1
80 13.4 11.5
18,000-20,0001
TAPERLEAF SBFA
50 11.9 10
60 12.3 10.4
70 12.7 10.8
80 13.1 11.2
22,000 - 24,000lbs.
2 TAPERLEAF SBFA
OMIT 12.3 9.4
30 13.4 10.5
40 13.8 10.9
50 14.2 11.3
60 14.6 11.7
70 15 12.180 15.4 12.5
NOTES:1) Shown with 20K load for laden dim. Add 0.3" toladen dim. if 18K load. S2) Shown with 23K load for ladendim. Add 0.1" to laden dim. if 22K load. Subtract 0.1" from ladendim. if 24K load.3) 16K springs with 12K to 14.6K axleminimum spacer block is 30 mm. With 16K springs and 20K axleminimum
spacer block is 50 mm.Note: Standard 3-1/2" drop axle heightsshown, for 5" drop axles, subtract an additional 1-1/2".SpacerBlocks are used by Engineering to obtain level frame and are notoptions."A" dimension shown is to bottom of frame rail. Add framerail height for frame height.
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3DIMENSIONS
Peterbilt Motors Company 3- 25
REAR FRAME HEIGHTS "C"
TABLE 3-5.Single Drive Suspension Heights
Suspension Rating VersionLight
HeightLadenHeight
AIR TRAC20,000 lbs. Standard 11.4 11.0
23,000 lbs. Standard 11.4 11.0
REYCO 79KB
20,000 lbs. Taperleaf (3.38" saddle) 9.4 11.8
21,000 lbs. Taperleaf (1.38" saddle) 7.4 9.8
23,000 lbs. Multileaf (1.38" saddle) 8.8 11.6
26,000 lbs. Multileaf (1.38" saddle) 9.2 11.8
28,000 lbs. Multileaf (1.38" saddle) 9.7 12.3
31,000 lbs. Multileaf (1.38" saddle) 10.8 13.3
REYCO 102
23K-29K lbs. 4.38 saddle 12.1 10.2
23K-29K lbs. 4.63 saddle 12.2 10.4
29,000 lbs 3.50 saddle 11.7 10.0
31,000 lbs 3.50 saddle 12.2 10.531,000 lbs 4.38 saddle 12.510.7
31,000 lbs 4.63 saddle 12.7 10.9
REYCO 102AR (AIR) 17K -23KStandard 9.3 9.3
Low 8.3 8.3
TABLE 3-6.Tandem Peterbilt Suspension Heights
Suspension Rating VersionLight
HeightLadenHeight
AIR LEAF 38,000 lbs. 12.0 11.7
LOW AIR LEAF 40,000 lbs. 8.8 8.5
FLEX AIR 38,000 lbs. 8.7 8.5LOW LOW AIRLEAF
40,000 lbs. 6.8 6.5
AIR TRAC 40K-46K lbs 11.4 11.0
QUADRAFLEX 38,000 lbs. Taperleaf 10.6 8.7
TABLE 3-7.Tandem Neway Suspension Heights
Suspension Rating VersionLight
HeightLadenHeight
NEWAY AD 52,000 lbs. 10.0 10.0
NEWAY ADZ 46K-52K lbs. 10.0 10.0
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3DIMENSIONS
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TABLE 3-8.Tandem Reyco Suspension Heights
Suspension Rating VersionLight
HeightLadenHeight
REYCO 102MULTILEAF
40,000 lbs
1.75 saddle (STD) 11.7 9.9
1.38 saddle 10.2 8.3
3.38 saddle 13.4 11.5
44,000 lbs1.75 saddle (STD) 11.7 9.8
1.38 saddle 11.5 9.7
REYCO 102AR (Air) 34K-40K STD LOW 8.3 8.3
TABLE 3-9.Tandem Chalmers Suspension Heights
Suspension Rating VersionLight
HeightLadenHeight
1
CHALMERS 854/860 40,000 lbs
LOW 11.2 8.9
HIGH 12.4 10.2
X-HIGH 14.5 12.2XX-HIGH 17.2 14.9
CHALMERS 854/860 46,000 lbs
LOW 11.3 8.9
HIGH 12.5 10.1
X-HIGH 14.7 12.2
XX-HIGH 17.3 14.9
CHALMERS 854/860 50K-52K
LOW 11.3 8.9
HIGH 12.5 10.1
X-HIGH 14.7 12.1
XX-HIGH 17.3 14.8
CHALMERS 872 46,000 lbs
LOW 11.2 8.8
HIGH 12.5 10.3
X-HIGH 14.7 12.2
XX-HIGH 17.3 14.9
CHALMERS 872 50,000 lbs
LOW 11.2 8.8
HIGH 12.5 10.3
X-HIGH 14.7 12.1
XX-HIGH 17.3 14.8NOTES:1) Laden dimension shown withstandard restrictor cans. Add 0.7” for #29 High StabilityRestrictor Cans.2) * With Meritor 70K axles frame height is22.5" for R650.
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3DIMENSIONS
Peterbilt Motors Company 3- 27
TABLE 3-10.Tandem Hendrickson Suspension Heights
Suspension Rating VersionLight
HeightLadenHeight
RT-403 40,000 lbs6.00 saddle 9.9 8.9
7.188 saddle (std) 11.2 10.1
RTE-403 40,000 lbs6.00 saddle 9.9 8.47.188 saddle (std)11.2 9.6
R-403 40,000 lbs
12.80 saddle 5.9 5.9
15.81 saddle (std) 8.9 8.9
17.60 saddle 10.6 10.6
RS-403 40,000 lbs
12.25 saddle 9.7 8.9
14.00 saddle (std) 11.5 10.6
15.25 saddle 12.7 11.9
HMX 40,000 lbs16.5 saddle (low) 10.6 9.5
18.5 saddle (std) 12.6 11.5
HMX 46,000 lbs16.5 saddle (low) 10.6 9.5
18.5 saddle (std) 12.6 11.5HN462 46,000 lbs 20.25 saddle (high)15 13.3
R-463 46,000 lbs15.75 saddle (std) 8.8 8.8
20.50 saddle 13.5 13.5
RS-463 46,000 lbs
12.25 saddle 9.7 8.9
14.00 saddle (std) 11.5 10.6
15.25 saddle 12.7 11.9
RT-463 46,000 lbs
6.00 saddle 11.3 10.5
7.188 saddle (std) 13 11.4
11.00 saddle 16.3 15.2
RTE-463 46,000 lbs7.188 saddle (std) 11.6 10.2
11.00 saddle 15.4 14
RS-503 50,000 lbs 14.00 saddle(std) 11.5 10.615.25saddle 12.7 11.9
RT-503 50,000 lbs7.188 saddle (std) 12.2 11.2
11.01 saddle 6.4 15.4
RTE-503 50,000 lbs7.188 saddle (std) 11.6 10.2
11.00 saddle 15.4 14
RS-523 52,000 lbs 14.0 saddle (std) 11.5 10.6
RT-523 , RT-650 52K-65K7.188 saddle (std) 12.2 11.2
11.00 saddle 16.4 15.4HN522 52,000 lbs 18.50 saddle (std)12.6 11.5
RS650 65,000 lbs15.00 saddle (std) 12.0
1 11.0
2
19.00 saddle 16.02
15.12
R650
3 65,000 lbs 20.25 saddle (std) 12.5 12.5
R850 w/70K Meritor85,000 lbs
20.25 saddle 12 12
R850 w/SISU 70K 20.25 saddle 12.1 12.1
RS850 w/SISU 70K 85,000 lbs 16.75saddle 14.513.8NOTES1) With SISU 70K axle subtract .39" fromlight/laden.2) With SISU 70K axle subtract .28 from lightand.39 from laden.3) With Meritor 70K axles frame height is22.5" for R650.
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3DIMENSIONS
Peterbilt Motors Company 3- 28
FRONT DRIVE AXLE, PTO’S AND AUXILIARY TRANSMISSIONS
The front drive axle, PTO and auxiliary transmission layouts areprovided as a tool to help layout bodies prior to arrival.Forinformation not detailed in these drawings, work with the localPeterbilt dealer to request that information.
EXAMPLES
FIGURE 3-20.Front Drive Axle with Spaghetti DriveExample
FIGURE 3-21.Front Drive Axle with Transfer CaseExample
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3DIMENSIONS
Peterbilt Motors Company 3- 29
FIGURE 3-22.PTO with Transfer Case Example
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3DIMENSIONS
Peterbilt Motors Company 3- 30
FIGURE 3-23.PTO with Transfer Case Example
FIGURE 3-24.PTO with Transfer Case Example
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3DIMENSIONS
Peterbilt Motors Company 3- 31
GUPPY OUTSERTS
The rear suspension guppy outsert layouts are provided as a toolto help layout bodies prior to arrival. For information nodetailedin these drawings, work with the local Peterbilt dealer to requestthat information.
FIGURE 3-25.Peterbilt Air Trac Tandem Suspension Guppy
FIGURE 3-26.Peterbilt Air Trac Single Suspension Guppy
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3DIMENSIONS
Peterbilt Motors Company 3- 32
FIGURE 3-27.Chalmers Tandem Suspension Guppy
FIGURE 3-28.Hendrickson HN/HMX/R Tandem SuspensionGuppy
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3DIMENSIONS
Peterbilt Motors Company 3- 33
FIGURE 3-29.Hendrickson RS Tandem Suspension Guppy
FIGURE 3-30.Hendrickson RT/RTE Tandem Suspension Guppy
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3DIMENSIONS
Peterbilt Motors Company 3- 34
FIGURE 3-31.Reyco 102 Single Drive Suspension Guppy
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3DIMENSIONS
Peterbilt Motors Company 3- 35
EXHAUST HEIGHT CALCULATIONS
The exhaust height calculations are provided as a tool to helplayout bodies prior to arrival as well as aid inexhaustconfiguration selection.
Please work with the local Peterbilt Dealer to requestadditional information if required.
The overall exhaust height (EH) can be estimated based on thefollowing formula: EH = Y + SPL + (A + B + C + D) / 2
TABLE 3-11.Exhaust Heights
Y = DISTANCE FROM BTM OF FRAME RAIL TO BTM OF STANDPIPE
ExhaustLocation 389-131
389-123, 386,384, 367, 365 579, 567 587
388 w/ LowProfile
Alum Hood
SOC Mounted(Day Cab)
67.2 69.2 70.2 N/A 67.2
SOC Mounted(Sleeper)
67.2 69.2 67.6 N/A 67.2
BOC Mounted N/A 70.7 69.2 N/A 68.7
FrameMounted
N/A 84.9 86.0 84.9 N/A
Vertical-Vertical
N/AISX/MX=77.3,
ISL=75ISX/MX=78.3,
ISL=75.7N/A N/A
NOTES:1) For “A” and “C” values, reference the FRAMEHEIGHTS section for front or rear suspension height.2) For“B” and “D” values, reference the tire manufacturer’s website orcatalog for static loaded radius (SLR). 3)
For Stand Pipe Length (SPL) values, reference the truck salesorder.
FIGURE 3-32.Exhaust Height Calculations
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3DIMENSIONS
Peterbilt Motors Company 3- 36
GROUND CLEARANCE CALCULATIONSThe ground clearance tables areprovided as a tool as a tool to help layout bodies prior toarrival, not all optionalequipment is included.
The ground clearance (GC) can be estimated based on thefollowing formula: GC = (A + B + C + D) / 2 - Y
TABLE 3-12.Ground Clearance
Y = DISTANCE FROM BOTTOM OFFRAME TO BOTTOM OF COMPONENT
Component Y
RHUC DPF/SCR 16.7
Horizontal (Series or X-Over)DPF/SCR
16.5
Battery/Tool Box 15.4
Space Saver Battery Box(w/o Air Tanks or Step) 3.9
Space Saver Battery Box(w/ Air Tanks or Step)
12.7
Frame Mounted Ladder Step 13.9
20" Diameter Fuel Tank 12.4
23" Diameter Fuel Tank 15.2
26" Diameter Fuel Tank 18.0
DEF Tank 15.4
NOTES:1) For “A” and “C” values, reference the FRAMEHEIGHTS section for front suspension height or rear suspension
height.2) For “B” and “D” values, reference the tiremanufacturer’s website or catalog for overall diameter or staticloaded
radius (SLR).
FIGURE 3-33.Ground Clearance Calculations
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3DIMENSIONS
Peterbilt Motors Company 3- 37
OVERALL CAB HEIGHT CALCULATIONS
The overall cab height tables are provided as a tool as a toolto help layout bodies prior to arrival, no roof mountedequipment isincluded.
The overall cab height (CH) can be estimated based on thefollowing formula: CH = (A + B + C + D) / 2 + Y
TABLE 3-13.Overall Cab Height
Y = DISTANCE FROM BTM OF FRAMETO TOP OF STANDARD CAB ROOF
Model Y
389-131, 389-123 Low
Profile Hood
79.4
389-123, 386, 384, 367,365
81.5
365 Full Profile FrameExtensions
85.5
587 Day Cab 85.2
579/567 83.7
NOTES:1) For “A” and “C” values, reference the FRAMEHEIGHTS section for front suspension height or rear suspension
height.2) For “B” and “D” values, reference the tiremanufacturer’s website or catalog for overall diameter or staticloaded
radius (SLR).3) Roof mounted content such as horns andantennas are not included.4) For extended day cabconfigurations, add 5.8”to overall cab height.
FIGURE 3-34.Overall Cab Height Calculations
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3DIMENSIONS
Peterbilt Motors Company 3- 38
FRAME COMPONENTS
This section includes drawings and charts related to commonframe mounted components. Optional equipment may nobe depicted.
Please work with the local Peterbilt Dealer to requestadditional information if required. At the dealer’s request,Peterbil
can provide frame layouts for individual vehicles prior todelivery.
FUEL TANKS
FIGURE 3-35.Fuel Tanks
TABLE 3-14.Fuel Tank Dimensions
DIMENSIONS
A B C D
20"TANK
22.7 12.4 10.3 27.5
23"TANK
24.5 15.2 10.5 31.0
26"TANK
27.2 18.0 10.6 33.7
TABLE 3-15.Fuel Tank Data
GALLONS TANK LENGTH
USEABLE TOTAL 20" 23" 26"
40 46 33.3 N/A N/A
50 57 43.2 34.5 26.7
60 67 51.3 40.7 31.5
70 78 57.3 46.8 36.2
80 89 65.3 52.9 41.0
90 99 N/A 59.0 45.7
100 110 N/A *65.1 50.5
110 121 N/A N/A 55.2
120 131 N/A 77.3 60.0
135 147 N/A N/A 66.8
150 163 N/A N/A *74.0
NOTES:1) * Largest capacity without a weld seam.
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3DIMENSIONS
Peterbilt Motors Company 3- 39
DEF TANKS
FIGURE 3-36.DEF Tanks
TABLE 3-16.DEF Tank Dimensions and Data
OTHER FRAME COMPONENTS
TABLE 3-17.Other Frame Component Dimensions
DESCRIPTION LENGTHSTANDARD BOC BATTERY BOX 40.9
STANDARD BOC TOOL BOX 31.6
SPACE SAVER BATTERY BOX W/ STEP 28.2
SPACE SAVER BATTERY BOX W/O STEP 25.1
FRAME MOUNTED LADDER STEP 12.8
DESCRIPTION GALLONS A B C
SMALL DEF TANK 11.0 27.7 15.4 10.5
MEDIUM DEF TANK 20.7 27.7 15.4 10.5
LARGE DEF TANK 31.1 27.7 15.4 10.5
FIGURE 3-37.DEF Tank Isometric View
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3DIMENSIONS
Peterbilt Motors Company 3- 40
EXHAUST SYSTEMS –389 Family
EXHAUST SINGLE RH SIDE OF CAB DPF/SCR RH UNDER CAB(Referenceoption code 3365040)
FIGURE 3-38.Exhaust Single RH Side of Cab DPF/SCR RH UnderCab
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3DIMENSIONS
Peterbilt Motors Company 3- 41
EXHAUST DUAL SIDE OF CAB DPF/SCR RH UNDER CAB(Reference optioncode 3365090)
FIGURE 3-39.Exhaust Dual Side of Cab DPF/SCR RH Under Cab
Notes:1)
11 5/8" frame rails or outserts are not available with dual sideof cab exhaust configuration.2) Dual side of cab exhaust isnot available with Models 384 or 365 SBFA.3) Dual side of cabexhaust is not available with an PX-9.4) Dual side of cabexhaust on Model 389-131 will be low route configuration, not thehigh route shown above.
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3DIMENSIONS
Peterbilt Motors Company 3- 42
EXHAUST SINGLE RH BACK OF CAB DPF/SCR RH UNDER CAB(Referenceoption code 3365020)
FIGURE 3-40.Exhaust Single RH Back of Cab DPF/SCR RH UnderCab
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3DIMENSIONS
Peterbilt Motors Company 3- 43
EXHAUST SINGLE HORIZONTAL DPF/SCR RH UNDER CAB(Reference optioncode 3365050)
FIGURE 3-41.Exhaust Single Horizontal DPF/SCR RH UnderCab
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3DIMENSIONS
Peterbilt Motors Company 3- 44
EXHAUST SINGLE RH BACK OF SLEEPER DPF/SCR RH UNDER CAB(Referenceoption code 3365030)
FIGURE 3-42.Exhaust Single RH Back of Sleeper DPF/SCR RHUnder Cab
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3DIMENSIONS
Peterbilt Motors Company 3- 45
EXHAUST DUAL BACK OF SLEEPER DPF/SCR RH UNDER CAB(Referenceoption code 3365100)
FIGURE 3-43.Exhaust Dual Back of Sleeper DPF/SCR RH UnderCab
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3DIMENSIONS
Peterbilt Motors Company 3- 46
EXHAUST SINGLE RH BACK OF SLEEPER DPF/SCR CROSS OVER UNDERFRAME(Reference option code 3365000)
FIGURE 3-44.Exhaust Single RH Back of Sleeper DPF/SCRCross Over Under Cab
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3DIMENSIONS
Peterbilt Motors Company 3- 47
EXHAUST DUAL BACK OF SLEEPER DPF/SCR CROSS OVER UNDERFRAME(Reference option code 3365110)
FIGURE 3-45.Exhaust Dual Back of Sleeper DPF/SCR CrossOver Under Cab
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3DIMENSIONS
Peterbilt Motors Company 3- 48
EXHAUST SINGLE HORIZONTAL LH DPF/SCR CROSS OVER UNDERFRAME(Reference option code 3365070)
FIGURE 3-46.Exhaust Single Horizontal DPF/SCR Cross OverUnder Cab
Notes:1) Day cabs require LH under cab battery box orin-cab battery box and omit hose tenna option.
DEF injector and coolant lines will be routed above therails.2) The piping between the DPF and SCR protrudes 1.2”above the 10-5/8” frame rail.
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3DIMENSIONS
Peterbilt Motors Company 3- 50
EXHAUST SINGLE LH BACK OF SLEEPER DPF/SCRVERTICAL–44”SLEEPER(Reference option code3365010)
FIGURE 3-48.Exhaust Single LH Back of Sleeper DPF/SCRVertical–44” Sleeper
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Peterbilt Motors Company 3- 51
EXHAUST SGL RH SIDE OF CAB ISL-G ONLY(Reference option code3365130)
FIGURE 3-49.Exhaust Single RH Side of Cab ISL-G Only
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3DIMENSIONS
Peterbilt Motors Company 3- 52
EXHAUST SINGLE RH BACK OF CAB ISL-G ONLY(Reference option code3365200)
FIGURE 3-50.Exhaust Single RH Back of Cab ISL-G Only
12.7”
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3DIMENSIONS
Peterbilt Motors Company 3- 54
EXHAUST SINGLE RH FRAME MTD ISL-G OR X12-G ONLY(Reference optioncode 3365140)
FIGURE 3-52.Exhaust Single Vertical ISL-G or ISL12-GOnly
19.4”
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3DIMENSIONS
Peterbilt Motors Company 3- 55
PTO CLEARANCES
This section includes visuals to aid in determining PTOlocations and clearances.
Please work with the local Peterbilt Dealer to requestadditional information such as specific dimensions if required.
Reference transmission manufacturer literature for PTO locationsfor each transmission.
Bottom View from Right Rear Bottom View
Bottom View from Right Side Rear View
FIGURE 3-53.Automatic Transmission PTO Clearances
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3DIMENSIONS
Peterbilt Motors Company 3- 56
Bottom View from Right Rear Bottom View
Bottom View from Right Side Rear View
FIGURE 3-54.Manual Transmission PTO Clearances
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SECTION 4 BODY MOUNTINGINTRODUCTION
This section has been designed to provide guidelines to aid inbody mounting. This is not intended as a complete guiderather asgeneral information. Body mounting strategies are unique to eachbody type and body builder must determine
the appropriate method.
Please contact your local Peterbilt dealer if more informationis desired.
FRAME RAILS
Frame rail information is provided per rail.
TABLE 4-1.Single Frame Rails
Rail Height(in.)
Flange Width(in.)
Web Thickness(in)
SectionModulus(cu. In.)
RBM (per rail)(in.-lbs)
Weight (per rail)(lbs/in.)
10 5/8 3.45 0.313 14.8 1,776,000 1.4410 3/4 3.50 0.375 17.82,136,000 1.74
11 5/8 3.87 0.375 21.4 2,568,000 1.91
TABLE 4-2.Built-up Frame RailsMain Rail
Height(in.) Insert Outsert
SectionModulus(cu. In.)
RBM (per rail)(in.-lbs)
Weight (per ra(lbs/in.)
10 5/8 9.875 x 2.87 x .250 None 23.6 2,832,000 2.48
10 3/4 9.875 x 2.87 x .250 None 28.9 3,468,000 2.78
10 3/4 9.875 x 2.87 x .250 11.63 x 3.87 x .375 45.7 5,484,0004.67
(1)
11 5/8 10.75 x 3.50 x .375 None 37.7 4,524,000 3.65
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4BODY MOUNTING
Peterbilt Motors Company 4-2
CRITICAL CLEARANCES
REAR TIRES AND CAB
CAUTION: Insufficient clearance between rear tires and bodystructure could cause damage to the body duringsuspensionmovement.
Normal suspension movement could cause contact between the tiresand the body. To prevent this, mount the body sothat the minimumclearance between the top of the tire and the bottom of the body is8 inches (203 mm). This should bemeasured with the body empty. SeeFIGURE 4-1.
FIGURE 4-1.Minimum Clearance Between Top of Rear Tires andBody Structure Overhang
CAUTION: Maintain adequate clearance between back of cab and thefront (leading edge) of mounted body. It isrecommended the bodyleading edge be mounted 4 in. behind the cab. See FIGURE4-2.
NOTE: Be sure to provide maintenance access to the battery boxand fuel tank fill neck.
FIGURE 4-2.Minimum Back of Cab Clearance
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4BODY MOUNTING
Peterbilt Motors Company 4-3
BODY MOUNTING USING BRACKETS
CAUTION:Always install a spacer between the body subframeand the top flange of the frame rail. Installation ofa spacerbetween the body subframe and the top flange of the frame rail willhelp prevent premature wear of thecomponents due to chafing orcorrosion.
WARNING! When mounting a body to the chassis, DO NOT drill holesin the upper or lower flange of theframe rail. If the frame railflanges are modified or damaged, the rail could fail prematurelyand cause anaccident. Mount the body using body mounting bracketsor U–bolts.
FRAME SILL
If the body is mounted to the frame with brackets, we recommenda frame sill spacer made from a strip of rubber or plastic(delrinor nylon). These materials will not undergo large dimensionalchanges during periods of high or low humidity. Thestrip will beless likely to fall out during extreme relative motion between bodyand chassis. See FIGURE 4-3.
FIGURE 4-3.Spacer Between Frame Sill and BodyRail–Rubber or Plastic
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4BODY MOUNTING
Peterbilt Motors Company 4-4
BRACKETS
When mounting a body to the chassis with brackets, we recommenddesigns that offer limited relative movement, boltedsecurely butnot too rigid. Brackets should allow for slight movement betweenthe body and the chassis. For instance,FIGURE 4-4shows a highcompression spring between the bolt and the bracket and FIGURE 4-5shows a rubber space
between the brackets. These designs will allow relative movementbetween the body and the chassis during extremeframe rackingsituations. Mountings that are too rigid could cause damage to thebody. This is particularly true with tankerinstallations.
FIGURE 4-4.Mounting Brackets FIGURE 4-5.MountingBrackets
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4BODY MOUNTING
Peterbilt Motors Company 4-5
MOUNTING HOLES
When installing brackets on the frame rails, the mounting holesin the chassis frame bracket and frame rail must complywith thegeneral spacing and location guidelines illustrated in FIGURE4-6.
FIGURE 4-6.Hole Location Guidelines for Frame Rail andBracket
FIGURE 4-7.Crossmember Gusset Hole Patterns (AdditionalHoles Available in 50 mm Horizontal Increments)
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4BODY MOUNTING
Peterbilt Motors Company 4-6
FRAME DRILLING
WARNING! When mounting a body to the chassis, DO NOT drill holesin the upper or lower flange of the framerail. If the frame railflanges are modified or damaged, the rail could fail prematurelyand cause an accident.Mount the body using body mounting bracketsor U–bolts.
FIGURE 4-8.Frame Rail Flange Drilling Prohibited
WARNING! DO NOT drill closely spaced holes in the frame rail.Hole centers of two adjacent holes should bespaced no less thantwice the diameter of the largest hole. Closer spacing could inducea failure between thetwo holes.
CAUTION:An appropriately sized bolt and nut must beinstalled and torqued properly in all unused frame holes.Failure todo so could result in a frame crack initiation around thehole.
CAUTION: Use care when drilling the frame web so the wires andair lines routed inside the rail are notdamaged. Failure to do socould cause an inoperable electrical or air system circuit.
CAUTION: Never use a torch to make holes in the rail. Use theappropriate diameter drill bit. Heat from a torchwill affect thematerial properties of the frame rail and could result in framerail cracks.
CAUTION: The hole diameter should not exceed the bolt diameterby more than .060 inches (1.5mm).
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4BODY MOUNTING
Peterbilt Motors Company 4-7
BODY MOUNTING USING U–BOLTS
If the body is mounted to the frame with U–bolts, use ahardwood sill (minimum 1/2 inch (12.7 mm) thick) between theframerail and body frame to protect the top surface of the railflange.
WARNING! Do not allow the frame rails or flanges to deform whentightening the U–
bolts. It will weaken theframe and could cause an accident. Usesuitable spacers made of steel or hardwood on the inside of theframerail to prevent collapse of the frame flanges.
Use a hardwood spacer between the bottom flange and theU–bolt to prevent the U–bolt from notching the frameflangeSee FIGURE 4-9.
FIGURE 4-9.Acceptable U-Bolt Mounting with Wood andFabricated Spacers
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4BODY MOUNTING
Peterbilt Motors Company 4-8
WARNING! Do not allow spacers and other body mounting parts tointerfere with brake lines, fuel lines, or wiringharnesses routedinside the frame rail. Crimped or damaged brake lines, fuel lines,or wiring could result in lossof braking, fuel leaks, electricaloverload or a fire. Carefullyinspect the installationto ensure adequateclearances for air brake lines, fuel lines, andwiring. See FIGURE 4-10.
FIGURE 4-10.Clearance Space for Air Lines and Cables
WARNING! Do not notch frame rail flanges to force aU–bolt fit. Notched ordamaged frame flanges couldresult in premature frame failure. Use a larger size U-bolt.
CAUTION: Mount U–bolts so they do not chafe on framerail, air or electric lines.
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4BODY MOUNTING
Peterbilt Motors Company 4-9
REAR BODY MOUNT
When U–bolts are used to mount a body we recommend thatthe last body attachment be made with a “fishplate” bracketSeeFIGURE 4-11. This provides a firm attaching point and helps preventany relative fore or aft movement between thebody and frame. Forhole location guidelines, See FIGURE 4-7.
FIGURE 4-11.Fishplate Bracket at Rear End of Body
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SECTION 5 FRAME MODIFICATIONSINTRODUCTION
Peterbilt offers customer specified wheelbases and frameoverhangs. So, in most cases frame modifications should nobenecessary.
However, some body installations may require slightmodifications, while other installations will requireextensivemodifications. Sometimes an existing dealer stock chassismay need to have the wheelbase changed to better fit acustomer’sapplication. The modifications may be as simple as modifying theframe cutoff, or as complex as modifyingthe wheelbase.
DRILLING RAILS
If frame holes need to be drilled in the rail, see SECTION 4BODY MOUNTING for more information.
MODIFYING FRAME LENGTH
The frame overhang after the rear axle can be shortened to
match a particular body length. Using a torch isacceptable;however, heat from a torch will affect thematerialcharacteristics of the frame rail. The affected materialwillnormally be confined to within 1 to 2 inches (25 to 50mm) oftheflame cut and may not adversely affect the strength of thechassisor body installation.
CHANGING WHEELBASE
Changing a chassis’ wheelbase is not recommended.Occasionally,however, a chassis wheelbase will need to beshortened orlengthened. Before this is done there are a fewguidelines thatshould to be considered.
WARNING! When changing the wheelbase, be sureto follow thedriveline manufacturer’srecommendations for driveline lengthor anglechanges. Incorrectly modified drivelines canfailprematurely due to excessive vibration. This cancause anaccident and severe personal injury.
Before changing the wheelbase, the driveline angles oftheproposed wheelbase need to be examined to ensure noharmfulvibrations are created. Consult with the drivelinemanufacturer forappropriate recommendations.
Before the rear suspension is relocated, check the newlocationof the spring hanger brackets. The new holes for thespring hangerbrackets must not overlap existing holes andshould adhere to theguidelines in the “FRAME DRILLING”section of this manual.
When shortening the wheelbase, the suspension should bemovedforward and relocated on the original rail. The railbehind thesuspension can then be cut to achieve the desiredframe overhang.See FIGURE 5-1.
FIGURE 5-1.Wheelbase Customization
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5FRAME MODIFICATIONS
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CROSSMEMBERS
After lengthening a wheelbase, an additional crossmember may berequired to maintain the original frame strength. Contact Dealerfor crossmember locations.
•
The maximum allowable distance between the forward suspensioncrossmember and the next crossmember forwardis 47.2 inches (1200mm). If the distance exceeds 47.2 inches (1200 mm) after thewheelbase is lengthened, add acrossmember between them. See Figure5-4. See Figure 4-7 on page 4-3 for crossmember hole patterns.
FIGURE 5-2.Crossmember Spacing Requirements
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TORQUE REQUIREMENTS
Torque values apply to fasteners with clean threads, lightlylubricated, with hardened steel washers, and nylon-insert nuts
TABLE 5-1. Customary Grade 8 UNF or UNC.
Fastener Torque
Size Nm Lb.-Ft
5/16 22–30 16–22
3/8 41–54 30–40
7/16 75–88 55–65
1/2 109–122 80–90
9/16 156–190 115-140
5/8 224–265 165–195
3/4 394–462 290–340
7/8 517–626 380–460
1 952–1129 800–830
1-1/8 1346–1591 990–1170
1-1/4 1877–2217 1380–1630
TABLE 5-2. U.S. Customary - Grade 8 Metric Class 10.9
Fastener Torque
Size Nm Lb-Ft
M6 9–15 7–11
M8 23–31 17–23
M10 33–43 24–32
M12 75–101 55–75
M14 134–164 99–121
M16 163–217 120–160
M20 352–460 260–340
WELDING
The frame rails are heat treated; therefore, they are notweldable.
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SECTION 6 ELECTRICAL 389 FAMILYCONTROL UNIT IDENTIFICATION
This manual provides service information covering modelsequipped with the multiplexed instrumentation system.Beforeattempting to make service repairs, the technician should beknowledgeable about the system design, components,
operation and troubleshooting procedures for diagnosinginstrumentation problems.
Vehicle component inputs are sent to the ICU/CECU through theJ1939 data bus or conventional wiring. The ICU/CECUinterprets thevarious inputs and monitors/controls the functions for each inputthrough the ICU/CECU software. Outpusignals from the ICU/CECUprovide data for the gauges, warning lamps, audible alarms, anddisplays inside the cluster.
When used in conjunction with the Electronic Service Analyst(ESA) diagnostic software tool, the technician can reviewfaultcodes stored in the ICU/CECU, verify whether the instrumentation isworking properly and diagnose the root cause ofthe problem moreeasily.
FUNCTIONAL DESCRIPTION-INSTURMENTATION CONTROL UNIT/CABELECTRONICCONTROL UNIT (ICU/CECU)
The heart of the multiplexed instrumentation system is theICU/CECU. The ICU/CECU is located behind the radio at thecenter ofthe dash. See FIGURE 6-1.
This manual provides service information covering trucksequipped with the multiplexed instrumentation system.Beforeattempting to make service repairs, the technician should beknowledgeable about the system design, components,operation andtroubleshooting procedures for diagnosing multiplexedinstrumentation problems.
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Electronic Service Agent (ESA)
Introduced in 2005, the Electronic Service Analyst (ESA) is thediagnostic software tool that is used to simplifythetroubleshooting of the new multiplexed instrumentation.CU orCECU?
Early multiplexing in Peterbilt trucks was for theinstrumentation system only. The module was known astheInstrumentation Control Unit (ICU).
Now, as multiplexing from this control module is being used forsystems other than just the instrumentation, the modulehas beenrenamed the Cab Electronic Control Unit (CECU).
The CECU is an updated ICU. It is still located behind thecenter console, but now includes a few more circuits toin-corporate the new features. ESA 2.0 is the tool for both.
Identifying which control module is in the vehicle helpsdetermine what features are present and also aidsintroubleshooting.
Models–
Build Dates Identification
TABLE 6-1.Control Module
Control
ModuleModels Production Build Dates
ICU 357, 378, 379,385, 386 Vehicles built with new conven-
tional interiors from April 2005 toJanuary 2007
CECU 365, 367, 384,386, 387, 388,389, 567, 579, 587
Vehicles built with EPA compli-ant engines beginningJanuary2007
IDENTIFICATION
Control module identification can be made using a fewmethods:
Searching using the Electronic Catalog (ECAT)
Connecting using the Electronic Service Analyst (ESA)2.0
Dome light function
ECAT IDENTIFICATION
Using ECAT or ESA 2.0 are the easiest and most exact ways ofdetermining the type of control module in the truck.
ECAT provides a parts list “as built” and Bill of Materialsinformation for each specific truck. The catalog issearchableand contains the part number and identification of thetruck’s instrument panel control module.
ICU Part Number Q21-1029-X-XXX
CECU Part Number Q21-1055-X-XXX
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ESA IDENTIFICATIONConnecting using ESA 2.0 brings up a controlmodule information window. In this window, the fourth line item istheControl Unit Type and identifies whether the truck has an ICU orCECU.
FIGURE 6-2.ESA Identification, Programming Date and ModuleSoftware Version
DOME LIGHT IDENTIFICATION
The CECU system has an updated feature that delays turning thedome light off when you close the door. The previousICU system didnot have this function so the light turns off as soon as the dooris shut. Therefore, if the dome light doesnot turn off immediatelyafter all doors are shut, then the vehicle has a CECU system. Ifthe dome light does turn offimmediately, then the vehicle may beICU OR CECU with this function disabled. In these cases, you willneed to refer toECAT for verification.
Comparison Chart
The following charts show the differences between the ICU andCECU.
The first chart provides an alphabetical listing of the featuresavailable for either an ICU or CECU. Since the CECU is anupdatedICU, almost all of the features of an ICU are found in a CECU,except a few out dated options such as thepyrometer.
The similarity of the modules is easily seen in the second chartas well. This chart is an abbreviated connector pinout ofeachmodule. Since the same wiring connections are used for bothmodules, it ’s easy to see that the CECU has morecircuits to handlethe increase in multiplexed features.
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TABLE 6-2.Dome Light IdentificationSupported Features ICUCECU
Air filter restriction x x
Air pressure transducer x x
Ammeter x x
Axle temperature 1 x xAxle temperature 2 x x
Axle temperature 3 x x
Backlighting -auxiliary x x
Brakesaver oil temperature x
Cab dome lamp x
Check engine telltale x x
Clutch switch x
Courtesy lights - left door x x
Courtesy lights -right door x
Cruise control x
CVSG data/power x x
Dash buzzer x x
Dash/panel illumination x xDimmer input x x
Dome lamp x
Editable telltale 1, position 4 x x
Editable telltale 2, position 7 x x
Editable telltale 3, position 8 x x
Editable telltale 4, position 9 x x
Editable telltale 5, position 10 x
Editable telltale 6, position 12 x x
Editable telltale 7, position 13 x
Editable telltale 8, position 14 x x
Editable telltale 9, position 16 x x
Engine fan override x
Fifth wheel lock telltale x xFuel filter restriction x x
Fuel level sensor 1 x x
Fuel level sensor 2 x x
General oil temperature x x
Hazard x x
Headlamps active x
High beam active x x
I-CAN high x x
I-CAN low x x
Idle timer relay x
Interaxle lock telltale x x
K-line x x
Left turn x xMessage display x
Outside air temperature x x
Park brake active x x
Power -accessory x x
Power -battery x x
Power -ignition x x
Power supply +5V sensors x x
Pyrometer x
Supported Features ICU CECU
Regeneration switch enable x
Retarder select x
Right turn x x
Seat belt telltale x
Spare analog input 2R xSpare analog input 3V x
Spare digital input 1H x
Spare digital input 1L x
Stop engine telltale x x
Tail & park lamps active x x
Tractor ABS telltale x x
Trailer ABS telltale x x
Transfer case oil temp x x
Transmission oil temp -aux x x
Transmission oil temp - main x x
V-CAN high x x
V-CAN low x x
Connector
PinNumber Circuit Function ICU CECU
A 1 CVSG power x x
2 Power - battery x x
3 Cab dome lamp x
4 Menu control switch power x
5 Ground x x
6 Menu control switch ground x
7 Dash/panel illumination x x
8 Auxiliary backlighting x x
9 Power -battery x
B 1 Menu control switch encode A x
2 Menu control switch encode B x
3 Menu control switch enter x
4Courtesy lights - right door jambswitch
x
5 Spare digital input 1H x
6 Dome lamp input x
7 Seat belt telltale x
8 Cruise set x
9 Cruise resume x
10 Spare digital input 1L x
11 Retarder select 1 x
12 Retarder select 2 x
13 Clutch switch x
14 Headlamps active x
15 PTO set (future provision) x
16 PTO resume (future provision) x
17 Engine fan override x
18 Regen enable x
19 Spare digital input 3L (future prov) x
20 Spare digital input 4L (future prov) x
21 Spare digital input 5L (future prov) x
22 Spare digital input 2H (future prov) x
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Connector
PinNumber Circuit Function ICU CECU
C 1 Power supply +5V sensors x x
2 Analog return x x
3PTO oil temp (futureprovision) x
4 K-line x x
5 Dimmer input x x
6Air pressure transducer - pri-mary x x
7Air pressure transducer -secondary x x
8Air pressure transducer -application x x
9 Ammeter x x
10 Air filter restriction x x
11 Fuel filter restriction x x
12 Fuel level sensor 1 x x
13 Fuel level sensor 2 x x
14 CVSG data x x15 CVSG return x x
16 Outside air temperature x x
17 Axle temperature 1 x x
18 Axle temperature 2 x x
19 Axle temperature 3 x x
20 General oil temperature x x
21Transmission oil temperature- main x x
22Transmission oil temperature- aux x x
23 Pyrometer x
24 Brakesaver oil temperature x
25 Analog return x x
26Transfer case oiltemperature x x
27Remote throttle signal (futureprovision) x
28Spare analog input 1V(future provision) x
29Spare analog input 2V(future provision) x
30 Spare analog input 3V x
31 Spare analog input 2R x
32Spare analog input 1R(future provision) x
39Spare relay output 8 (futureprovision) x
D 1 Power - ignition x x
2Courtesy lights -left doorjamb switch x x
3 Power - accessory x x
4 Hazard x x
5 Tail & park lamps active x x
6 High beam active x x
7 Park brake active x x
8 Left turn x x
Connector
PinNumber Circuit Function
ICU CECU
D 9 Right turn x x
(cont.) 10 Cruise on/off x
11 Interaxle lock telltale x x
12 Fifth wheel lock telltale x x
13 Tractor ABS telltale x x
14 Trailer ABS telltale x x
15 Check engine telltale x x
16 Stop engine telltale x x
17Spare digital input 6L (futureprovision)
x
19 Editable telltale 1 - position 4 x x
20 Editable telltale 2 - position 7 x x
21 Editable telltale 3 - position 8 x x
22 Editable telltale 4 - position 9 x x
23 Editable telltale 5 - position 10 x24 Editable telltale 6 -position 12 x x
25 Editable telltale 7 - position 13 x
26 Editable telltale 8 - position 14 x x
27 Editable telltale 9 - position 16 x x
28 Dash buzzer 1A x x
29 Dash buzzer 1B x x
30 Dash buzzer 1C x x
31 Dash buzzer 2 x x
32 M-CAN high (future provision) x
33 M-CAN low (future provision) x
34 I-CAN high x x
35 I-CAN low x x
37 V-CAN high x x
38 V-CAN low x x
E 1 Idle timer relay x
2Spare relay output 1 (futureprovision)
x
3Spare relay output 2 (futureprovision)
x
4Spare relay output 3 (futureprovision)
x
5 Ground x
6Spare relay output 4 (futureprovision)
x
7Spare relay output 5 (futureprovision)
x
8Spare relay output 6 (futureprovision)
x
9Spare relay output 7 (futureprovision)
x
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HOW MULTIPLEXED INSTRUMENTS WORK
Multiplexed gauges receive signals through the InstrumentationControl Unit/Cab Electronic Control Unit (ICU/ CECU)located behindthe center console. The ICU/CECU receives sensor signals eitherthrough the J1939 data bus or viaconventional wiring sendingsignals from sensors that read actual pressures or temperatures.The ICU/CECU interprets
this data and monitors or controls vehicle operation through theICU/CECU software. The ICU/CECU then sends data tothe gauges,warning lamps, audible alarms, and displays located inside thegauge clusters. The central instrument cluster(Figure 6-3) includesthe speedometer (including odometer and trip meter) and tachometer(including engine hour meterand outside temperature display), pluspre-installed standard and/or editable warning light symbols called“telltale decals”mounted on the “Icon Tray.”
The Icon Tray slides into the bottom of the cluster. Thestandard Icon Tray covers most warning light requirements;editableicon lenses can be added for less common components that alsorequire warning lights.
FIGURE 6-3.Central Instrument Cluster
Introduction
This section provides service information covering PeterbiltConventional Models equipped with the multiplexedinstrumentationsystem. Before attempting to make service repairs, the technicianshould be knowledgeable about thesystem design, components,operation and troubleshooting procedures for diagnosinginstrumentation problems.
Vehicle component inputs are sent to the ICU/CECU through theJ1939 data bus or conventional wiring. The ICU/CECUinterprets thevarious inputs and monitors/controls the functions for each inputthrough the ICU/CECU software. Outpusignals from the ICU/CECUprovide data for the gauges, warning lamps, audible alarms, anddisplays inside the cluster.See Figure 6-5.
When used in conjunction with the Electronic Service Analyst(ESA) diagnostic software tool, the technician can reviewfaultcodes stored in the ICU/CECU, verify whether the instrumentation isworking properly and diagnose the root cause ofthe problem moreeasily.
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Central Instrument Cluster
The central instrument cluster includes:
driver information display
speedometer (including odometer and trip meter)tachometer (including engine hour meter and outside temperaturedisplay)
pre-installed standard and/or editable warning lightsymbols called “telltale decals” mounted on the “Icon Tray.”
The Icon Tray slides into the bottom of the cluster. Thestandard Icon Tray covers most warning light requirements;editableicon lenses can be added for less common components that alsorequire warning lights.
The Driver Information Display, located at the top of theinstrument cluster, displays vehicle information andwarningsthrough a constant monitoring of the vehicle systems. Thevarious functions may be accessed by navigating throughmenu screensusing the menu control switch (rotational knob).
FIGURE 6-4.ICU/CECU Access
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ICU/CECU ArchitectureThe software programming of the controlmodule can be grouped into three main types:
Run Time (RT) - which acts as the operating system whereall communication takes place.
Programmable Logic Controller (PLC) Code - manufacturerspecific programmed code and software that is
developed, accessible and editable. Vendor Module - blocksof code that are developed for specific manufacturers to allowother features to be
implemented more efficiently.
See Multiplexed Instrumentation Block Diagram (Figure 6-6).
To better understand how Electronic Service Analyst (ESA)functions and why there are current limitations on some ofthemultiplexed features, by explaining what ESA can see. CurrentlyESA can look at all information that is communicatedbetween the RTand PLC Code portions of the programming. Any signals, be theyinputs, outputs, or dataline signals,sent between the RT and PLCCode are visible to ESA. These are the signals that may bemonitored and simulated usingESA.
Limitations with the ESA program are found in the communicationsthat go to the pre-developed Vendor Modules.
Currently this information is not available for ESA to look at.That is why some features that have Vendor Moduleprogramming, suchas the odometer and the message display, are not available tomonitor and/or simulate through ESA.
FIGURE 6-6.CECU Block Diagram
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The central instrument cluster receives input data from theICU/CECU via the I-CAN data bus. When the ignition keyis firstturned ON, the cluster performs a calibration poweronself-test.
Power On Self-Test
Ignition key turned ON.
The speedometer and tachometer gauge pointers move frompointing at zero, counter-clockwise to theimechanical limit(approx. -8°), remain there for 1 second and return to pointing atzero.
At the same time, all LED indicators and telltales areswitched on together, and then switched off together.
A warning sound sequence is also activated five timeswithout a break.
The warning lamps in the cluster are all activated by theICU/CECU, Three screens will sequentially displaywarning icons onthe Driver Information Dis¬play. The ICU/CECU receives direct wireinputs for all warning lampswith the exception of the Low Cool¬antLevel warning and the Traction Control/Stability Control lamp.These lampinputs are received via the J1939 (vehicle CAN) datalink. The ICU/CECU typi¬cally receives the Trailer ABSwarnings viathe J1939 (Vehicle CAN) data link, however it can also be di¬rectwired to the ICU/CECU from theABS unit on the trailer, ifrequired.
NOTE: Before replacing the ICU/CECU or any gauges, check thewiring and fuses, and perform the diagnostic tests usingESA toverify that you are not replacing a good component.
Commercial Vehicle Smart Gauges (CVSG)
The right and left instrument panel gauges used with themultiplexed instrumentation are commonly referred to asCommercialVehicle Smart Gauges (CVSG). Like the central instrument cluster,the 2-inch gauges also receive input datadirectly from theICU/CECU. CVSG’s are electronic and mechanical. The electronicCVSG’s receive digi¬tal data from theICU/CECU via the CVSG databus. The mechanical gauges (i.e. suspension air pressure, etc.) aredriven directly from theair pressure. Both types of gauges receiveinput signals from the ICU/CECU via a 4-wire “daisy chained” jumperharnessthat links one gauge to another. When the ignition key isfirst turned ON, all the electronic 2-inch gauges will performacalibration “power on self-test.”
Power On Self-Test
Ignition key turned ON.
The gauge pointers move from pointing at zero,counterclockwise to their mechanical limit (approx. ¬5°),remainthere for 1 second and return to pointing at zero.
At the same time, all LED indicators are switched ontogether, and then switched off together.
Additional CVSG gauge information service technicians should beaware of:
2-inch electronic gauges receive their power from theICU/CECU.
Yellow = Power wire (9-16 volts)
Green = Ground (Return) wire
The ICU/CECU sends 2-inch electronic gauges informationover a data link (blue wire) between the ICU/ CECUand thegauge.
4-way jumper harnesses link each 2-inch gaugetogether.
Yellow = Power wire
Green = Ground (Return)
Blue = Data link
Brown = Backlighting (used for mechanical gaugesonly)
Backlighting for 2-inch electronic gauges is sent fromthe ICU/CECU to the gauges via the data link (Blue wire).
If the headlamps are on and the dimmer is turned tobright, you can scan the panel and tell which elec¬tronicgauges arewired and functioning correctly.
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If part of the panel has gauges backlit and some of thegauges are not backlit, the jumper harness wire betweenthe gaugesis probably not connected properly.
If a 2-inch electronic gauge has power (yellow wire) andground (green wire) but is not receiving data (blue wire),then thered indicator lamp at the 6 o’clock position of the gauge blinksafter 30 seconds of waiting for data. Thisindicates there is anopen or short in the blue wire between the gauge and theICU/CECU.
If the red indicator lamp is on but the gauge isoperational, it indicates the value is out of normal range.If a 2-inch electronic gauge has a short or open in the sensorwiring, the gauge needle moves 5° below the firs
tick mark (approximately one needle thickness).
Optional mechanical gauge (such as air suspension)needles are driven mechanically with air pressure. There isno redwarning lamp and the backlighting is through the brown wire fromthe ICU/CECU (a PWM input). The 4way jumper harness is still usedto pass all 4 circuits through the gauge to the next gauge in thechain.
Specialty CVSG gauges (such as the clock, PTO hour meter,and transmission display) are stand-alone gaugesand are independentof the ICU/CECU.
Instruments and Controls Operation
Before attempting to repair any instrumentation problems, thetechnician should have a complete understanding of howtheinstruments and controls operate.
Speedometer The Speedometer indicates the vehicle speed in milesper hour (mph) and in kilometers per hour (km/h).
TachometerThe Tachometer measures the engine speed inrevolutions per minute (rpm).
Air Filter Restriction PressureThe Air Filter RestrictionPressure gauge indicates the condition of the engine air cleanerandis measured by inches of water (H2O). A clean filter shouldregister 7 in. H2O (may vary with system design) and afilter whoselife is over registers approximately 25 in. H2O.
Air Starter PressureThe Air Starter Pressure Gaugeindicates the amount of air pressure in the air startreservoir.
AmmeterThe Ammeter monitors the vehicle’s electricalsystem and makes sure the system is in balance andoperatingnormally. If not, it may be drawing power from thealternator (positive reading) or from the batteries (negativereading).Under normal conditions the ammeter will read nearly“zero.”
Axle, Drive Oil TemperatureThe Drive Axle Oil Temperaturegauges (front, rear, and center) indicate the temperature othelubricant in the vehicle’s axles.
Axle, Pusher Air Pressure, #1, #2, #3The Pusher Axle AirPressure gauges indicate the air pressure in each of thepusheraxles suspension air bags.
Axle, Tag Air PressureThe Tag Axle Air Pressure gaugeindicates the amount of air pressure in the tag axle suspensionairbags.
Brake, Application Air PressureThe Brake Application AirPressure gauge indicates how much air pressure is beingapplied fromthe foot brake valve or trailer brake hand valve to the airbrakes.
BrakeSaver Application Air Pressure (Export vehiclesonly)The BrakeSaver Application Air Pressure gaugeindicatesthe amount of air pressure applied to the BrakeSaver handcontrol valve.BrakeSaver Oil Temperature (Export vehicles only) TheBrakeSaver Oil Temperature gauge indicates the temperaturein theBrakeSaver. If the oil temperature exceeds the maximum limits, ared warning lamp in the gauge turns on.
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Engine Coolant TemperatureThe Engine Coolant Temperaturegauge indicates the temperature of the engine coolant.If thecoolant temperature exceeds the maximum limits, a red warning lampin the gauge illuminates and an audiblewarning sounds. If thecoolant temperature continues to rise, the Check Engine and/or StopEngine lights illuminate.Under normal operating conditions thewater temperature gauge should register between 165 and 205°F (74and 90°C)Under certain conditions, somewhat higher temperatures maybe acceptable. The maximum allowable temperature is
220°F (104°C) with the cooling system pressurized, except forcertain engines.
Engine, Oil PressureIf the oil pressure drops below theminimum pressure a red warning light in the gauge illuminates,theStop Engine light illuminates and an audible alarm tone sounds.
Engine Oil TemperatureThe Engine Oil Temperature gaugeindicates the engine oil temperature. If the oil temperatureexceedsthe maximum limits, a red warning light in the gaugeilluminates.
Fuel Filter Restriction PressureThis gauge tells you thecondition of the fuel filter by indicating the restriction fromthefuel filter to the fuel pump. The restriction is measured byinches of mercury (in-Hg).
Fuel Level, Primary/Secondary (if equipped) The Pri¬maryFuel gauge and Secondary Fuel gauge (if equipped)indicate theapproximate amount of fuel in each fuel tank. In addition toindicating empty and full, the gauge(s) alsoindicate the fuel levelin graduated increments. When the fuel level for each tank is below1/4 full, a red warning light inthe gauge illuminates.
General Air Pressure #1, #2The General Air Pressuregauge(s) are used for customer installed componentapplications.
General Oil Temperature The General Oil Temperaturegauge(s) are used for customer installed componentapplications.
Manifold Pressure (Boost) The Manifold Pressure (Boost)gauge indicates the power the engine is putting out byshowing theamount of turbo boost. If the pressure indicated by the manifoldpressure gauge goes down, there may besomething wrong with theengine
Primary and Secondary Air Pressure GaugeThe Primary AirPressure gauge indicates pressure in the rear brakingsystem. TheSecondary gauge indicates pressure in the front braking system.Each gauge indicates the amount of ai
pressure in each system in pounds per square inch (psi). Onvehicles equipped with metric air pressure gauges, thegaugefaceplate includes a kPa (major) scale and psi (minor) scale. Ifthe pressure in either or both circuits falls below 65psi, a redwarning light in the gauge illuminates and an audible alarm tonesounds when the engine is running.
Suspension Load Air Pressure, #1, #2The Suspension LoadAir Pressure gauge indicates the amount of air pressure inthe airsuspension air bags. When the vehicle is equipped with a secondSuspension Load Air pressure gauge, the #1gauge indicates the airpressure in the driver’s side air bags. The #2 gauge indicates theair pressure in the passenger’sside air bags.
Tractor Brake Application Air PressureThe Tractor BrakeApplication Air Pressure gauge indicates the amount of airpressureapplied to the tractor brakes.
Trailer Brake Application Air PressureThe Trailer BrakeApplication Air Pressure gauge indicates the amount of ai
pressure applied to the trailer brakes during brake foot valveand/or hand brake control valve applications.Trailer Reservoir AirPressure The Trailer Reservoir Air Pressure gauge indicates theamount of air pressure in the trailerbrake reservoir.
Transfer Case Oil TemperatureThe Transfer Case OilTemperature gauge indicates the temperature of the oil inthetransfer case. If the oil temperature exceeds maximum limits, ared warning light in the gauge il luminates.Transmission OilTemperature, Main The Main Transmission Oil Temperature Gaugeindicates the temperature of the oiin the transmission.
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Transmission Oil Temperature, AuxiliaryThe AuxiliaryTransmission Oil Temperature gauge indicates the temperatureof theoil in the auxiliary transmission.
Transmission Retarder Oil TemperatureThe TransmissionRetarder Oil Temperature gauge indicates the temperatureof the oilin the transmission retarder.
Voltmeter The Voltmeter displays the battery voltage. Normally,it shows 12 to 14V (volts). A red warning light in thegaugeilluminates when an out of range condition exists.
TABLE 6-3.Gauge Input Sources
Standard / Optional Input Source Input Source Sensor

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References