SECTION 1: INTRODUCTION 1-1
SECTION 2: SAFETY AND COMPLIANCE
SAFETY SIGNAL S 2-1
FEDERAL MOT O R VEHI CLE SAFETY STANDA RD S AND COMPLIANCE 2-2
NOISE AND EMISSIO N S R EQU IREMENTS 2-3
FUEL SYSTEM 2-4
COMPRESSED AIR SYSTEM 2-4
EXHAUST AND EXHAUST AFTER-TREATMENT SYSTEM 2-5
COOLING SYSTEM 2-6
AIR INTAKE SYSTEM 2-6
CHARGE AIR COOLER SYSTEM 2-6
Functional Description-Cab Electronic Control Unit (CECU) 6-1
HOW MULTIPLEXED INSTRUMENTS WORK 6-2
CECU Architecture 6-2
Power On Self-Test 6-3
ELECTRICAL INTERFACE 6-4
Cab Harness 6-5
Chassis Harness 6-9
J1939 6-9
Body Builder Harness Extensions 6-9
Guidelines - J1939 Circuit Requirements 6-9
J1939 Access 6-9
J1939 Access Procedures 6-9
SECTION 8: PTO SECTION
INTRODUCTION 7-1
TRANSMISSION MOUTED PTO – GENERAL 7-1
Manu
al Transmission 7-1
Automatic Transmission 7-2
Installation Clearances 7-2
FRONT ENGINE PTO 7-3
REAR ENGINE PTO 7-4
PTO INSTALLATIONS 7-5
REMOTE PTO CONTROL (12 PIN CONNECTOR) 7-6
INSTALLTION OF PTO MODEL 7-7
CHELSEA 890 7-7
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SECTION 1 INTRODUCTION
The Peterbilt 520 Body Builder Manual was des igned to provide body builders with a comprehensive information set to
guide the body planning and installation process. Use this information when installing bodies or other associated
equipment.
This manual contains appropriat e dimensional information, guidelines for mounting bodies, modifying fr ames, electrical
wiring information, and other information useful in the body installation process.
The Peterbilt 520 Body Builder Manual c an be ver y usef ul whe n specif ying a ve hic le, partic ularl y when th e bod y builder is
involved in the vehicle definition and ordering proc ess. Information in this m anual will help reduce overall cos ts through
optimized integration of the body installation with vehicle se lection. Early in the process , professional body builders c an
often contribute valuable information that reduces the ultimate cost of the body installation.
In the interest of continuing product developm ent, Peterbilt reserves the right to change spec ifications or products at any
time without prior notice. It is the responsibility of the user to ensure that he is working with the latest released information.
Check Peterbilt.com for the latest released version.
If you require additional information or reference materials, please contact your local Peterbilt dealer.
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SAFETY AND COMPLIANCE
SECTION 2 SAFETY AND COMPLIANCE
SAFETY SIGNALS
We’ve put a number of alerting messages in t his book. Please r ead and follow them. They are there for your
protection and information. These alerting m essages can h elp you avoid injury to yourself or other s and help
prevent costly dam - age to the vehicle.
Key symbols and “signal words” are used to indicate what kind of message is going to follow. Pay special attention
to comments prefaced by “WARNING”, “CAUTION”, and “NOTE.” Please don’t ignore any of these alerts.
Warnings, cautions, and notes
WARNING
Example:
WARNING! Be sure to use a circuit breaker designed to meet liftgate amperage requirements. An
incorrectly specified circuit breaker could result in an electrical overload or fire situation. Follow the
liftgate installation instructions and use a circuit breaker with the recommended capacity.
CAUTION
Example:
CAUTION: Never use a torch to make a hole in the rail. Use the appropriate drill bit.
NOTE
When you see this word and symbol, the message that follows is especially vital. It signals a
potentially hazardous situation which, if not avoided, could result in death or serious injury.
This message will tell you what the hazard is, what can happen if you don’t heed the warning,
and how to avoid it.
Signals a potentially hazardous situation which, if not avoided, could result in minor or
moderate injury or damage to the vehicle.
Provides general information: for example, the note could war n you on how to avoid damaging
your vehicle or how to drive the vehicle more efficiently.
Example:
Note: Be sure to provide maintenance access to the battery box and fuel tank fill neck.
Please take the time to read these messages when you see them, and remember:
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Signals a potentially hazardous situation which, if not avoided, could result in minor or moderate
injury or damage to the vehicle.
NOTE
Useful information that is related to the topic being discussed.
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SAFETY AND COMPLIANCE
FEDERAL MOTOR VEHICLE SAFETY STANDARDS AND COMPLIANCE
As an Original Equipment Manufacturer, Peterbilt Motors Company ensures that our products comply with all applicable
U.S. or Canadian Federal Motor Vehicle Safety Standards. However, the fact that this vehicle has no fifth wheel and that a
Body Builder (Intermediate or Final Stage Manufacturer) will be doing additional modifications means that the vehicle was
incomplete 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 2–1.
In addition, affixed to the driver’s side door frame or edge is an Incomplete Vehicle Certification label . See Figure 2–2.
NOTE
These documents list the U.S. or Canadian Federal Motor Vehicle Safety Standard regulations that the
vehicle complied with when it left the build plant. You should be aware that if you add, modify or alter any
of the components or systems covered by these regulations, it is your responsibility as the Intermediate or
Final Stage Manufacturer to ensure that the complete vehicle is in compliance with the particular
regulations upon completion of the modifications.
U.S. EPA Noise Label (U.S. registered vehicles only)
inal Stage Manufacturer
F
Label to be installed by
Final Stage Manufacturer
FIGURE 2-2. Locations of Certification Labels - Driver’s Door and Frame
As the Intermediate or Final Stage Manufacturer, you should retain the Incomplete Vehicle Document for your records. In
addition, you should record and retain the manufacturer and serial number of the tires on the vehicle. Upon completion of
the vehicle (installation of the body and any other modifications), you should affix your certification label to the vehicle as
required by Federal law. This tag identifies you as the “Intermediate or Final Stage Manufacturer” and certifies that the
vehicle complies with Federal Motor Vehicle Safety Standards. (See Figure 2–2.) Be advised that regulations affecting the
intermediate and final stage manufacturer may change without notice. Ensure you are referencing the most updated copy
of the regulation during the certification and documentation processes.
In part, if the final stage manufacturer can complete and certify the vehicle within the instruction in the incomplete vehicle
document (IVD) the certification label would need a statement that reads, “This vehicle has been completed in accordance
with the prior manufacturers‚ IVD where applicable. This vehicle conforms to all applicable Federal Motor Vehicle Safety
Standards [and Bumper and Theft Prevention Standards if applicable] in effect in (month, year).”
However, if the vehicle cannot be completed and certified with in the guidance provided in the IVD, the final stage
manufacturer must ensure the vehicle conforms to all applicable Federal Motor Vehicle Safety Standards (FMVSS). The
final stage manufactures certification lab e l would need a statement that reads, “This vehicle conforms to all applicable
Federal Motor Vehicle Safety Standards [and Bumper and Theft Prevention Standards if applicable] in effect in (month,
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SAFETY AND COMPLIANCE
year).These statements are just part of the changes to the new certification regulation. Please refer to the Feb 15, 2005
final rule for all of the details related to this regulation. You can contact NTEA Technical Services Department at 1-800441- NTEA for a copy of the final rule (DocID 101760).
For Canadian final stage manufacturers see:
http://www.gazette.gc.ca/index-eng.html;
and http://www.tc.gc.ca/eng/acts-regulations/menu.htm for
the regulations.
This truck may be equipped with specific emissions control components/systems* in order to
meet applicable Federal and California noise and exhaust emissions requirements. Tampering
with these emissions control components/systems* is against the rules that are established by the
U.S Code of Federal Regulations, Environment Canada Regulati ons a nd California Air Resources
Board (CARB). These emissions control componen ts /s ystems* may only be replaced with orig in al
equipment parts.
Additionally, most vehicles in North America will be equipped with a Greenhouse Gas (GHG)
“Vehicle Emission Control Information” door label indicating its certified configuration. The vehicle
components listed on this label are considered emission control devices.
Modifying (i.e. altering, substituting, relocating) any of the emissions control components/systems
defined above will affect the noise and emissions performance/certification. Modifications that
alter the overall s ha pe and aer odynamic performance of a tractor will also affect the emission
certification. If modifications are required, they must first be approved by the manufacturer.
Unapproved modifications could negatively affect emissions performance/certification. There is no
guarantee that proposed modifications will be approved.
Tires may be substituted provided the new tires possess a Coefficient of rolling resistance (Crr)
equal to or lower than Crr of the original tires. Consult with your tire supplier(s) for appropriate
• For Cummins Contact 1-800-DIESELS or your local Cummins distributor. Reference AEB 21.102.
It is possible to relocate the DEF tank; however the relocation requirements need to be followed. Any variances from the
relocation requirements may cause the emissions control components/systems to operate improperly potentially resulting
in engine de-rate.
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replacement tires.
Contact the engine manufacturer for any requirements and restrictions prior to any modifications.
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SAFETY AND COMPLIANCE
NOTE
To ensure compliance to emissions regulations, the final configuration of certain features of the completed vehicle
must meet specific requirements. This section describes requirements relevant for only the most common or critical
modifications done by body builders. For a complete description of acceptable modifications, see the application
guidance available from the manufacturer of the engine installed in the chassis.
All 2017 engine emissions certified vehicles will be equipped with an On-Board Diagnostics
(OBD) system. The OBD system is designed to detect malfunctions of any engine or vehicle
component tha t may increase exhaust emissions or interfere with the proper performance of the
OBD system itself All diesel engines will be equipped with an On-Board Diagnostics (OBD)
system. The OBD system consists of computer program on one or more of the vehicle’s Electronic
Control Units (ECUs). This program uses information from the control system and from additional
sensors to detect malfunctions. When a malfunction is detected, information is stored in the
ECU(s) for diagnostic purposes. A Malfunction Indicator Light (MIL) is illuminated in the dash to
alert the driver of the need for service of an emission-related component or system.
Fuel System
The following are highlights of some of the more common or critical aspects of this system.
The overall system restriction may not exceed the restriction limitations set forth by the engine manufacturer for both
supply and return.
• Ensure that fuel lines are not pinched or can potentially be damaged when installed between body
and frame
• Fuel lines must be routed and secured without dips or sags
• There must be easy access to filter(s) and fill cap
• The tank vent may not obstructed
• Added accessories (heaters, generators) cannot introduce air into system
• Fuel tank must be located so that the full level is not above cylinder head
• “Ultra-Low Sulfur Fuel Only” labels must be present on the dash and fuel fill
• Modification of the pressure side secondary filter and plumbing is not allowed without engine
manufacturer approval
• Body installation of fuel tank or routing of lines must not cause significant increase in fuel temperature
• Fuel hoses shall meet or exceed OEM supplied hose material construction specifications
Compressed Air System
The following are highlights of some of the more common or critical aspects of this system.
• Air system modification must meet applicable FMVSS regulations
• Compressed Air tank may not be modified (exception – addition or removal of fittings or relocation of the
tank)
• Added devices or bodywork may not interfere with or rub air lines
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SAFETY AND COMPLIANCE
• Air supply to the engine doser may not be restricted or disconnected
• Air lines should be routed, protected from heat, and properly secured to prevent damage
from other components
• Care should be taken so that air lines do not rub against other components
• Care should be taken to protect the air system from heat sources
Exhaust and Exhaust After-treatment System
The following are highlights of some of the more common or critical aspects of this system.
• The following after-treatment and exhaust system components may not be modified:
• DPF assembly
• SCR Catalyst assembly
• Exhaust pipes between the engine and after-treatment devices (DPF, SCR Catalyst) and between
after-treatment devices
• NO
• PM Sensor
• The following modifications may only be done within the guidelines of the “DEF System Relocation Guide.”
• Modifications to Diesel Exhaust Fluid (DEF) throttle, s uction, or press ure lin es
• Modification or relocation of the DEF tank
• Modification of coolant lines to and from the DEF tank
• All DEF and coolant lines should be routed, protected, and properly secured to prevent damage during
• If relocation of the DCU or ACM is necessary, use existing frame brackets and mount inside of frame
• The DPF, the SCR catalyst, or their mounting may not be modified
• The NOx sensor may not be relocated or altered in any way; this includes re-clocking the
• Exhaust pipes used for tailpipes/stacks must be properly sized, and must prevent water from entering
• Ensure ade quat e clearance between the exhaust and body panels, hoses, and wire harnesses
• The body in the vicinity of the DPF must be able to withstand temperatures up to 400°C (750°F)
• Do not add thermal insulation to the external surface of the DPF
Sensors
x
vehicle operation or other components
flanges where necessary. Do not extend the harnesses
aftertreatement canister or reorienting the sensor(s)
• The SCR water drain hole may not be blocked
• Allow adequate clearance (25mm (1 inch)) for servicing the DPF sensors, wiring, and clamped joints
• Drainage may not come in contact with the DPF, SCR catalyst, sensors or wiring
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• Allow sufficient clearance for removing sensors from DPF. Thermistors require four inches. Other
sensors require one inch
• Wiring should be routed, protected from heat, and properly secured to prevent damage
from other components
• The exhaust system from an auxiliary power unit (APU) must not be connected to any part of the
vehicle after-treatment system or vehicle tail pipe.
Cooling System
The following are highlights of some of the more common or critical aspects of this system.
• Modifications to the design or locations of fill or vent lines, heater or defroster core, and surge tank are
not recommended
• Additional accessories plumbed into the engine cooling system are not permitted, at the risk of voiding
vehicle warranty
• Coolant level sensor tampering will void warranty
• When installing auxiliary equipment in front of the vehicle, or additional heat exchangers, ensure
that adequate air flow is available to the vehicle cooling system. Refer to engine manufacturer
application guide- lines for further detail
• When installing FEPTO drivelines, the lower radiator anti-recirculation seal must be retained with
FEPTO driveline clearance modification only
• Changes made to cooling fan circuit and controls are not allowed, with the exception of AC
minimum fan on time parameter
• See owner’s manual for appropriate winter front usage
Air Intake System
The following are highlights of some of the more common or critical aspects of this system.
• The air intake screen may not be blocked, either fully or partially
• Modification to the air intake system may not restrict airflow. For example, pipe dia meter may not be reduced
• All sensors must be retained in existing locations
• To retain system seal, proper clamp torque must be used. Refer to service manual for proper clamp torque
Charge Air Cooler System
The following are highlights of some of the more common or critical aspects of this system.
• The Charge Air Cooler may not be modified
• The installation of engine overspeed shutdown devices must not introduce restriction in the intake system
• All plumbing associated with the charge air cooler may not be modified
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SECTION 3 DIMENSIONS
INTRODUCTION
This section has been designed to provide enough information to successfully layout a chassis in the body planning
process. All dimensions a re inches unless otherwise noted. Optional equipm ent may not be depicted. Please contact
your local Peterbilt dealer if more dimensional information is desired.
ABBREVIATIONS
Throughout this sectio n and in other sections as wel l, abbreviations are used to describe certain character istics on your
vehicle. Table 3-1 below lists the abbreviated terms used.
TABLE 3-1. Abbre vi ati ons U sed
BFA Bumper to front axle
BOC Back of cab
CA Cab to axle. Measured from the back of the cab to the centerline of the rear axle(s).
EOF Frame rail overhang behind rear axle--measured from the centerline of tandems
FAX Front axle
FOF Front of frame
WB Wheelbase
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DIMENSIONS
OVERALL DIMENSIONS
This section includes drawings and charts of the Peterbilt Model 520.
On the pages that follow, detail drawings show particular views of the vehicle; all dim ensions are in inches (in). They
illustrate important measurements critical to designing bodies of all types. See the “Contents” at the beginning of the
manual to locate the drawing that you need.
All heights are given from the bottom of the frame rail.
Note that the Aftertreatment mounting is almost identical other than the use of a DEF tank (for diesels) and different
canister/catalyst but both use the same stanchions for mounting BOC.
FIGURE 3-1. Various Views of the Model 520
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DIMENSIONS
EXTERIOR DIMENSIONS
FIGURE 3-2. 520 Cab Dimensions
Notes:
1. Shown with optional HD Air intake Pre-Cleaner
2. Shown with optional front cab guard
3. Door dimension is 33.4”W x 61”H
4. Diesel truck shown, but Natural Gas has same BOC dimension for Aftertreatement.
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DIMENSIONS
INTERIOR DIMENSIONS
FIGURE 3-3. View Looking Through Cab to the Driver’s Side (LH Steer)
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DIMENSIONS
INTERIOR DIMENSIONS
FIGURE 3-4. View Looking Through the Cab At The RH Drive Standup Version
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DIMENSIONS
INTERIOR DIMENSIONS
FIGURE 3-5. Top View of LH Steer Model
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DIMENSIONS
INTERIOR DIMENSIONS
FIGURE 3-6. Floor Dimensions for LH Floor
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DIMENSIONS
INTERIOR DIMENSIONS
FIGURE 3-7. Passenger Floor RH Stand Up
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DIMENSIONS
FRAME RAILS
Frame rail configurations are shown in Figure 3-8. The under cab area of the 520 frame rails are splayed as shown in
Figure 3-9. Frame height, flange and structural values can be found in the Body Mounting Section.
FIGURE 3-8. Frame Rail Configurations
NOTE: The outserted frame section does not extend through the rear suspension area. The outserted frame
section does not extend through the splayed area.
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DIMENSIONS
FRAME RAILS
FIGURE 3-9. Model 520 Frame Rail
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DIMENSIONS
FRAME HEIGHT CHARTS
FIGURE 3-4. Frame Height
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DIMENSIONS
TABLE 3-2. Front Frame Height “A” – 520
NOTES:
1) Omit spacer block standard.
2) 25mm spacer block standard and required.
3) Standard 3-1/2" drop axle heights shown, for 5" drop axles, subtract an additional 1-1/2".
4) Spacer blocks are used by Engineering to obtain level frame and are not options.
5) "A" dimension shown is to bottom of frame rail. Add frame rail height dimension for frame height.