Kenworth K370 Body Builder's Manual
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Kenworth K370 Body Builder's Manual

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  • Page 2 Medium Duty Body Builder’s Manual Model: K270/K370...

  • Page 3: Table Of Contents

    Crossmember Locations –K270 W/19.5 Tires ................3-19 Frame Rail Configurations ......................3-21 Battery Box, Fuel Tanks and Air Tanks — K270/K370 ............... 3-22 DPF & SCR Locations – K270/K370 ................... 3-23 Reyco 79KB Single Rear Axle Hendrickson HAS Single Rear Axle ........3-24 TIRE DATA ..........................
  • Page 4 Body Builder’s Manual Contents BODY MOUNTING USING U–BOLTS Spacers ............................5-6 REAR BODY MOUNT SECTION 6 FRAME MODIfiCATIONS FRAME MODIFICATIONS Introduction ............................. 6-1 DRILLING RAILS Location and Hole Pattern ....................... 6-1 MODIFYING FRAME LENGTH Frame Insert ............................ 6-2 Changing Wheelbase........................6-3 Crossmembers ..........................
  • Page 5 Figure 3-7.1. Cab Floor: Side View, Left Side w/ 22.5 Tires ................3-14 Figure 3 -8.1.1 K270 W/ Air to Oil Transmission Cooler, Battery Box, Fuel Tank, Air Tank, DEF Tank, and Crossmember Location Measured From Front Axle: inches (mm)..........3-15 Figure 3-8.1.2 K270 W/ Oil to Water Transmission Cooler, Battery Box, Fuel Tank, Air Tank, DEF...
  • Page 6 Figures Figure 5-6. Rubber Spacer Between Brackets ......................5-5 Figure 5-7. Hole Locations Guidelines for Frame Rail and Bracket ............... 5-5 Figure 5-8. Crossmember-Gusset Hole Pattern Requirements. [inch(mm)] ............5-6 Figure 5-9. Acceptable U-Bolt Mounting with Wood and Fabricated Spacers ............5-7 Figure 5-10.
  • Page 7 Table 3-7.2 Battery Box Step and Cab Floor Measurements w/22.5 Tires ............3-14 Table 3-8 Floor to Frame Measurements ......................3-14 Table 3-9.1. K270 Crossmember Location Measured from the Front of the Frame inches (mm) ...... 3-19 Table 3-9.2 K370 Crossmember Location Measured From Front Axle Centerline inches (mm) ....3-20 Table 3-10.

  • Page 8: Section 1 Introduction

    The intended primary users of this manual are body builders who install bodies and associated equipment on K270/K370 Medium Duty vehicles. Dealers who sell and service the vehicle will also find this information useful. This Body Builder’s Manual can be very useful when specifying a vehicle, particularly when the body builder is in- volved in the vehicle definition and ordering process.

  • Page 9: Safety Signals

    Section 2 Safety & Compliance SAFETY SIGNALS We have put a number of alerting messages in this book. Please read and follow them. They are there for your protection and infor- mation. These alerting messages can help you avoid injury to yourself or others and help prevent costly damage to the vehicle. Key symbols and “signal words”...

  • Page 10: Federal Motor Vehicle Safety Standards Compliance

    STANDARDS COMPLIANCE As an Original Equipment Manufacturer (OEM), Kenworth Truck Co. 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...

  • Page 11: Noise And Emissions Requirements

    Section 2 Safety & Compliance Noise and Emissions Requirements NOTE: This truck may be equipped with a converter muffler unit in order to meet both noise and exhaust emissions requirements. Removal or tampering with the converter muffler will not improve engine per- formance.

  • Page 12: Section 3 Dimensions

    Section 3 Dimensions ABBREVIATIONS Throughout this section and in other sections as well, abbreviations are used to describe certain characteristics on your vehi- cle. The chart below lists the abbreviated terms used. Table 3-1. Abbreviations Used OVERALL VEHICLE LENGTH FRAME RAIL OVERHANG LENGTH BEHIND REAR FRONT BUMPER TO FRONT AXLE LENGTH BACK OF CAB TO REAR AXLE LENGTH CAB HEIGHT...

  • Page 13: Turning Radius

    Dimensions TURNING RADIUS Approximate turning radius specifications for the K270/K370 are listed (by wheelbase) in the following tables. Tables 3-2 Turning Ra- dius and 3-3 Cab Tilt Height information for chassis with standard components. Optional components may give different results.

  • Page 14: Cab Tilt

    Section 3 Dimensions CAB TILT K270 W/19.5 Tires Table 3-3 Cab Tilt Height CAB Tilt Highest point inches (mm) K270 K370 W/19.5 Tires W/19.5 126.5 (3217.5) Tires K370 W/19.5 128 (3260.5) Tires K370 W/22.5 131 (3336.9) Tires...

  • Page 15: K370 W/22.5 Tires

    Section 3 Dimensions K370 W/22.5 Tires...

  • Page 16: Overall Dimensions

    Section 3 Dimensions OVERALL DIMENSIONS This section includes drawings and charts of the base model K270/K370, which includes: 1. Front and Rear Suspensions 3. On the K370 w/19.5 tires Front R227F 285/70R19.5 Rear M729F 285/70R19.5 2. On the K270 w/19.5 tires 4.

  • Page 17: Table 3-4. Overall K270 W/19.5 Tires Dimensions Inches (Mm)

    Section 3 Dimensions Table 3-4. Overall K270 W/19.5 Tires Dimensions inches (mm) FAX to FAX to Back of Overall Recommend- Overhang (AF) Frame Length Model Intake Length ed Body inches (mm) inches (mm) inches (mm) inches (mm) inches (mm) inches...

  • Page 18: Side View - K370

    Section 3 Dimensions Side View - K370 Figure 3-2. Side View —K370 W/19.5 Tires Height and Length Measurement Table 3-5.1. Overall K370 W/19.5 Tires Dimensions FAX to Recom- FAX to Back of In- Overhang (AF) Frame Length Overall Length mended inches (mm) take inches (mm)

  • Page 19: Figure 3-3. Side View -K370 W/22.5 Tires Height And Length Measurement

    Section 3 Dimensio ns Figure 3-3. Side View —K370 W/22.5 Tires Height and Length Measurement Table 3-5.2. K370 W/22.5 Tires Overall Dimensions Recom- FAX to FAX to Back Frame Overall Overhang (AF) mended Model of Intake Length Length inches (mm) inches (mm) inches (mm) Body...
  • Page 20 Front and Rear Views — Section 3 K270/K370 Dimensio ns inches (mm)

  • Page 21: Front And Rear Views - K270/K370

    Section 3 Dimensions Front and Rear Views — K270/K370 K270 K370 Figure 3-4. K270/K370 W/19.5 Tires Front View: Width and Ground Clearance Measurements: inches (mm). Figure 3-4.1. K270/K370 W/22.5 Tires Front View: Width and Ground Clearance Measurements: inches (mm). 3-10...

  • Page 22: Figure 3-5. K270 W/19.5 Tires Rear View: Width And Ground Clearance Measurements: Inches (Mm)

    Dimensions Front and Rear Views — K270/K370 W/19.5 and 22.5 Tires Figure 3-5. K270 W/19.5 Tires Rear View: Width and Ground Clearance Measurements: inches (mm). Figure 3-5.1 K370 W/19.5 Tires Rear View: Width and Ground Clearance Measurements: inches (mm). Note: 11R22.5 is 10.3" (261.6mm) and 295/75R22.5 is 9.8" (248.9mm)

  • Page 23: Detail Views

    Section 3 Dimensions DETAIL VIEWS Left side: Chassis Heights –K270 W/19.5 Tires Figure 3-6. Cab Floor: Side View, Left Side Table 3-6 K270 W19.5 Tires Battery Box Step and Cab Floor Measurements K270 19.5 Tires Position Unladen Laden 10.1 205.2 FUEL SUPPORT STEP 21.4...

  • Page 24: Left Side: Chassis Heights - K370

    Section 3 Dimensions Detail Views Left side: Chassis Heights – K370 Figure 3-7. Cab Floor: Side View, Left Side w/ 19.5 Tires Table 3-7.1 Battery Box Step and Cab Floor Measurements w/ 19.5 Tires K370 19.5 Tires Position Unladen Laden FUEL SUPPORT 10.5 191.2...

  • Page 25: Figure 3-7.1. Cab Floor: Side View, Left Side W/ 22.5 Tires

    Table 3-8 Floor to Frame Measurements. LOADED inches (mm) UNLOADED inches (mm) Frame Heights Front Axle Rear Axle Front Axle Rear Axle K270 W/19.5 Tires 32.11 (815.3) 32.2 (817.3) 34.47 (875.5) 34.5 (876.1) K370 W/19.5 Tires 32.65 (829.3) 33.3 (846.3) 36.08 (916.4)

  • Page 26: Components Locations -K270 W/19.5 Tires

    Detail Views Components Locations –K270 W/19.5 Tires Figure 3 -8.1.1 K270 W/ Air to Oil Transmission Cooler, Battery Box, Fuel Tank, Air Tank, DEF Tank, and Cross- member Location Measured From Front Axle: inches (mm). Figure 3-8.1.2 K270 W/ Oil to Water Transmission Cooler, Battery Box, Fuel Tank, Air Tank, DEF Tank, and Crossmember Location Measured From Front Axle: inches (mm).

  • Page 27: Components Locations -K370

    Section 3 Dimensions Detail Views Components Locations –K370 Figure 3-8.2.1 K370 W/Air to Oil Transmission Cooler, 19.5 tires Battery Box, Fuel Tank, Air Tank, DEF Tank and Crossmember Location Measured From Front Axle: inches (mm). Figure 3-8.2.2 K370 W/Oil to Water Transmission Oil Cooler and 19.5 Tires, Battery Box, Fuel Tank, Air Tank, DEF Tank, and Crossmember Location Measured From Front Axle: inches (mm).

  • Page 28: Figure 3-8.2.3 K370 22.5 Tires, Battery Box, Fuel Tank, Air Tank, Def Tank, And Crossmember Location Measured From Front Axle: Inches (Mm)

    Section 3 Dimensions Figure 3-8.2.3 K370 22.5 Tires, Battery Box, Fuel Tank, Air Tank, DEF Tank, and Crossmember Location Meas- ured From Front Axle: inches (mm). Figure 3-8.2.4 K370 22.5 Tires, Battery Box, Dual Fuel Tanks, Air Tank, DEF Tank, and Crossmember Location Measured From Front Axle: inches (mm).

  • Page 29: Figure 3-8.2.5 K370 22.5 Tires, Short Wheelbase, Air Tanks On The Rh Side, Battery Box, Def Tank And Crossmember Location Measured From Front Axle: Inches (Mm)

    Section 3 Dimensions Figure 3-8.2.5 K370 22.5 Tires, Short Wheelbase, Air Tanks on the RH Side, Battery Box, DEF Tank and Crossmember Location Measured From Front Axle: inches (mm) 3-18...

  • Page 30: Crossmember Locations -K270 W/19.5 Tires

    Section 3 Dimensions Detail Views Crossmember Locations –K270 W/19.5 Tires Figure 3-9.1. K270 Crossmember Location Table 3-9.1. K270 Crossmember Location Measured from the Front of the Frame inches (mm) 1st Inter- 2nd Intermedi- 2nd Midship Front susp Rear susp 1st Midship...

  • Page 31: Figure 3-9.2. K370 Crossmember Locations

    Section 3 Dimensions Detail Views Crossmember Locations –K370 Figure 3-9.2. K370 Crossmember Locations Table 3-9.2 K370 Crossmember Location Measured From Front Axle Centerline inches (mm) K370 W/19.5 BOC C/M 1st C/M 2nd C/M Front susp C/M Rear susp C/M 1st Rear C/M Tires WB 166 46.6 (1185)

  • Page 32: Frame Rail Configurations

    Section 3 Dimensions Frame Rail Configurations K270 K370 9-7/8 STEEL RAIL 10-1/4 STEEL RAIL Figure 3-10. K270/K370 Rail Measurements Table 3-10. Frame Rail Strength Characteristics 10.25” Rail 9.875” Rail RAIL STRENGTH (K370 W19.5 and 22.5 tires) (K270 W19.5 tires) 120,000...

  • Page 33: Battery Box, Fuel Tanks And Air Tanks - K270/K370

    Section 3 Dimensions Battery Box, Fuel Tanks and Air Tanks — K270/K370 Figure 3-11. K270/K370 Battery Box, Fuel Tank and Air Tanks Measurement mm (in) 3-22...

  • Page 34: Dpf & Scr Locations - K270/K370

    K270 K370 40.8 (1036.4) 76 (1930.3) 42 (1065.7) 90.1 (2287.3) 16.5 (420) 14.6 (370.4) Table 3-13. K270 / K370 Exhaust Location Measured From BOC inches (mm) Model 14 (354.2) 5.7 (145) 5.3 (134) 9.9 (250.8) 12.6 (320.4) 16.5 (420.2) 12 (304.2) K270 14 (354.2)

  • Page 35: Reyco 79Kb Single Rear Axle Hendrickson Has Single Rear Axle

    Section 3 Dimensions Reyco 79KB Single Rear Axle Hendrickson HAS Single Rear Axle Suspension Rating Laden Ride Height Unladen Ride Height Reyco 79KB Single 7.5" 9.0" Hendrickson HAS 210L/230L 8.3" 8.5" TIRE DATA For dimensions of your particular Bridgestone tire, visit the Bridgestone website, www.bridgestonetrucktires.com FRAME AND CAB RELATED HEIGHTS The bottom of the frame rail (BOF) at the front and rear axle can be used as a reference point to estimate vertical heights.

  • Page 36: Pto Clearances

    The following visuals are provided to help or aid in determining PTO locations and clearances. For specific dimensions please work through your local Kenworth dealer. Multiple PTO’s are shown for layout purposes only. Power equipment, i.e., drive shafts & power pumps are not included.

  • Page 37: Figure 3-14.1 K370 Pto Clearances 1 Of 2

    Section 3 Dimensions Figure 3-14.1 K370 PTO Clearances 1 of 2 Figure 3-14.2 K370 PTO Clearances 2 of 2 3-26...

  • Page 38: Figure 3-15 K270 Pto Clearances

    Section 3 Dimensions Figure 3-15 K270 PTO Clearances 3-27...

  • Page 39: Section 4 Exhaust & Aftertreatment

    SCR works, please contact your local Kenworth dealer. On most Kenworth chassis, the DEF Supply Module (or pump) is integrated into the DEF tank. Kenworth does not allow relocation of this pump. The following schematic details how the DEF lines route to the after-treatment system.
  • Page 40 Section 4 Exhaust & Aftertreatment DEF will freeze at approximately 11° F (-12° C). In order to keep DEF from freezing, all tanks will be heated with engine coolant. The following schematic shows the routing of these lines. The coolant lines that run to and from the SCR system must not be tampered with, or used for a source of heat and/or cooling for other components on the chassis.

  • Page 41: General Guidelines For Def System

    General Guidelines for DEF System The installation of the DEF tank is a critical component of the SCR system. While Kenworth does not recommend relocat- ing the DEF tank, there are applications and body installations that will require it. The guidelines below must be strictly followed by any entity relocating the tank.

  • Page 42: Measurement Reference Points

    Section 4 Exhaust & Aftertreatment Measurement Reference Points For all relocation procedures, the measurement points referenced in the guidelines are taken from the following specific points: Supply Module: The supply module is commonly called a pump. The measurement point on the supply module is the top of the DEF fluid pressure line.

  • Page 43: Figure 4-3: Orientation Of Dosing Module

    Section 4 Exhaust & Aftertreatment Figure 4-3: Orientation of Dosing Module Routing to the Dosing Module (Injector) It is important for the function of the dosing module to ensure that the dosing module is not routed downstream of DEF lines or components. If this is unavoidable (for example on RH under exhaust systems) or Horizontal (Series) Exhaust, a routing trap must be installed.

  • Page 44: General Exhaust Information

    GENERAL EXHAUST INFORMATION Kenworth will offer a DPF and SCR exhaust system on K270/K370 chassis in 2012/2013, which is a Horizontal Crosso- ver system for K270/K370 models where DPF, SCR and tailpipe are installed side by side with LH horizontal tailpipe.

  • Page 45: Figure 4-5.2: Right View Of Horizontal Crossover Dpf And Scr With Horizontal Tailpipe

    Section 4 Exhaust & Aftertreatment Figure 4-5.2: Right view of Horizontal Crossover DPF and SCR with Horizontal Tailpipe Figure 4-5.3: Back view of Horizontal DPF and SCR with Horizontal Tailpipe Crossover...

  • Page 46: Section 5 Frame Layouts And Body Mounting

    The Back of Cab components are shown primarily for reference. For more specific requirements, work with your local Kenworth Dealer. Please read the instructions carefully. The following dimensions are consistent across the entire section to aid in the comparison of one layout option versus another.

  • Page 47: Acronyms Index

    Section 5 Frame Layouts and Body Mounting Acronyms Index Throughout the Frame Layout section you will see these acronyms. They are defined here to help you decode the layouts. BOC - Back Of Cab LHUC - Left Hand under Cab CBOC - Clear Back of Cab RHUC - Right Hand under Cab DEF - Diesel Exhaust Fluid...

  • Page 48: Critical Clearances

    Be sure to provide maintenance access to battery box and fuel tank fill neck. The true distance from the centerline of the front axle to the back of the cab is 13.3 inches (337.8mm) for K270 and 11 inches for K370 (279.4 mm). It is recommended that the leading edge of the body be mounted a minimum of 4 inches (102 mm) behind the cab.

  • Page 49: Body Mounting Using Brackets

    Section 5 Frame Layouts and Body Mounting WARNING: If the frame rail flanges are modified or damaged, the rail could fail prematurely and cause an accident. When mounting a body to the chassis, DO NOT drill holes in the upper or lower flange of the frame rail.

  • Page 50: Brackets

    Section 5 Frame Layouts and Body Mounting Body Subframe (Rail) Spacer Chassis Frame (Rail) Sill Figure 5-4. Spacer Between Frame Sill and Body Rail - Rubber or Plastic Brackets When mounting a body to the chassis with brackets, we recommend designs that offer limited amount of relative move- ment, bolted securely but not too rigid.

  • Page 51: Frame Drilling

    Section 5 Frame Layouts and Body Mounting Figure 5-8. Crossmember-Gusset Hole Pattern Requirements. [inch(mm)] Frame Drilling WARNING: When mounting a body to the chassis, DO NOT drill holes in the upper or lower flange of the frame rail. If the frame rail flanges are modified or damaged, the rail could fail prematurely and cause an accident.

  • Page 52: Figure 5-9. Acceptable U-Bolt Mounting With Wood And Fabricated Spacers

    Section 5 Frame Layouts and Body Mounting Do not allow the frame rails or flanges to deform when tightening the U–bolts. It will WARNING! weaken the frame and could cause an accident. Use suitable spacers made of steel or hardwood on the inside of the frame rail to prevent collapse of the frame flanges. Use a hardwood spacer between the bottom flange and the U–bolt to prevent the U–bolt from notching the frame flange.

  • Page 53: Rear Body Mount

    Section 5 Frame Layouts and Body Mounting Do not notch frame rail flanges to force a U–bolt fit. Notched or damaged frame flanges could re- WARNING! sult in premature frame failure. Use a larger size U–bolt. Use a hardwood spacer as shown in Fig- ure 5-9.

  • Page 54: Section 6 Frame Modifications

    Frame Modifications FRAME MODIFICATIONS Introduction The K270/K370 offers customer specified wheelbases, so, in most cases frame modifications to produce a certain wheel- base should not be necessary. However, some installations may require slight modifications, while other installations will require extensive modifications.

  • Page 55: Modifying Frame Length

    Section 6 Frame Modifications MODIFYING FRAME LENGTH The frame cutoff after the rear axle can be shortened to match a particular body length. Using a torch is acceptable; however, heat from a torch will affect the material characteristics of the frame rail. The affected material will normally be confined to with- in 1 to 2 inches (25 to 50 mm) of the flame cut and may not adversely affect the strength of the chassis or body installation.

  • Page 56: Changing Wheelbase

    Section 6 Frame Modifications Where possible, use existing bolt holes to attach the insert to the frame. Bolt holes must not be located closer to the frame flanges than the present bolt pattern. If the insert is placed in a section of the main frame where few bolts are located, additional bolts are required. Use the following guideline for locating additional bolt holes.

  • Page 57: Crossmembers

    Section 6 Frame Modifications WARNING! Do not drill new holes any closer than 2 inches (50 mm) to existing holes. Frame drilling affects the strength of the rails. Before the rear suspension is relocated, check the new location of the spring hanger brackets. The new holes for the spring hanger brackets must not overlap existing holes and should not come any closer than 2 inches (50 mm) to existing holes.

  • Page 58: Electrical Electrical

    Section 7 Electrical ELECTRICAL Introduction Electrical wiring can sometimes be very frustrating. This is especially true when adding circuits to an existing setup. Through the use of an optional body harness and additional spare circuits, we have tried to reduce the complexity as- sociated with adding common circuits to a body installation.

  • Page 59: Dashboard Identification

    Section 7 Electrical Dashboard Identification Instrument panel (unused) Dimmer, dashboard lighting PTO operation (unused) (unused) Diff-lock switch (optional equipment) Air conditioning Front fog lamps 12V connection Heater, fan speed selector switch in Menu selection switch fresh air position or recirculation position Ashtray with 12V auxiliary socket Heater, temperature control Hazard warning lights...

  • Page 60: Data Bus Communication

    Section 7 Electrical Data Bus Communication Abbreviation List: Antilock Braking System ABS-E Transmission Control Module Digital Instrument Pack DIP-4 Digital Tachograph MTCO Engine Control Module Steering Wheel Switches Vehicle Intelligence Center 3 VIC3 Lite Vehicle Controller Area Network V-CAN Instrumentation Controller Area Network I-CAN The V-CAN, also referred to as the J1939, is used to transmit data between the transmission, ABS system, engine, etc.

  • Page 61: Removal And Installation

    Section 7 Electrical REMOVAL AND INSTALLATION Removal and Installation, Switches Removing switches 1. Insert a feeler gauge of approx. 1 mm (0.04 in) thick between the switch and the panel at the side of the finger-sized depression (A), until it touches the inside of the panel. 2.
  • Page 62 Section 7 Electrical 3. Remove the attachment bolts (1) and the panel plug (2) and remove the steering column dashboard panel. Removing lower dashboard panel, co-driver’s side 1. Remove the attachment bolts from the lower dashboard panel on the co-driver's side. Remove the lower dashboard panel on the co- driver's side.
  • Page 63 Section 7 Electrical Removing instrument panel 1. Remove the attachment bolts (1) from the decorative strip (2) around the instrument panel (3). 2. Pull the fixing clamps (see arrows) which attach the decorative strip (2) to the dashboard panel carefully out of the dashboard panel. 3.
  • Page 64 Section 7 Electrical Removing upper cover 1. Remove the attachment bolts from the underside of the cover. 2. Tilt the cover upwards out of the upper cover panel. Removing central console control panel 1. Remove the switches (3) from the central console control panel (5). 2.
  • Page 65 Section 7 Electrical Removing upper dashboard panel, driver’s side 1. Remove the attachment bolts (1) from the radio panel (2). 2. Remove the attachment bolts (3) from the dashboard panel. 3. Cut the cable ties that attach the wiring harnesses to the dashboard panel. 4.
  • Page 66 Section 7 Electrical Installing central console control panel 1. Fit the cigarette lighter (4) connector to the rear of the central console control panel (5). 2. Fit the central console control panel (5) to the dashboard. 3. Connect the switches (3) of the central console control panel (5) to the connectors. Fit the switches (3) to the central console control pan- el (5).
  • Page 67 Section 7 Electrical Installing lower dashboard panel, driver’s side 1. Fit the connector block to the rear of the dashboard panel using the attachment bolts. 2. Fit the connector of the headlamp height adjustment unit to the dashboard panel. 3. Fit the dashboard panel using the attachment bolts (1). Installing instrument panel 1.
  • Page 68 Section 7 Electrical Installing lower dashboard panel, co-driver’s side 1. Fit the lower dashboard panel on the co-driver's side using the attachment bolts. Installing steering column dashboard panel 1. Fit the steering column dashboard panel using the attachment bolts (1) and the panel plug (2). REMOVAL AND INSTALLATION, COMPLETE DASHBOARD Removing dashboard 7-11...
  • Page 69 Section 7 Electrical 1. Disconnect the earth lead from the battery terminal. 2. Remove the attachment bolts and panel plug (6) and remove the steering column cover panel. 3. Remove the attachment bolts (1), (2) and (3) and remove the cover panel on the co-driver's side. 4.
  • Page 70 Section 7 Electrical 12. Remove the connectors (2). 13. Push the retainers (1) to one side and push the connector plate inside. 14. Remove the attachment bolts (1) from the filter casing and remove the filter casing (2). 15. Remove the attachment bolts (1). 16.
  • Page 71 Section 7 Electrical 17. Remove the connectors to the left and right of the steering column. 18. Remove the connectors (2) and the earth connections (3). 19. Remove the attachment bolts on the underside of the dashboard, left and right. 20.
  • Page 72 Section 7 Electrical 11. Fit the filter casing (2). Secure the filter casing with the attachment bolts (1). 12. Fit the plate for the connectors via the inside and press it into the retainers (2). 13. Fit the connectors (1). 14.
  • Page 73 24. Fit the cover panel to the engine tunnel. Fit the earth lead to the battery terminal. A Canadian option is available. The speedometer will have primary units in metric. dditional gauges will need to be hard wired and remotely mounted. For models K270/K370, a 7-16...
  • Page 74 Section 7 Electrical Signal Description Terminal 30 Power Supply Terminal 31 Ground K-Line K-line Parameter FLA-LOAD Flash Loader Call I-CAN-L I-CAN-Low I-CAN-L I-CAN-Low I-CAN-H I-CAN-High I-CAN-H I-CAN-High V-CAN-SHLD Res. V-CAN-Shield I-CAN-SHLD Res. I-CAN-Shield V-CAN-L Vehicle CAN Low V-CAN-L Vehicle CAN Low V-CAN-H Vehicle CAN High V-CAN-H...
  • Page 75 Section 7 Electrical Digital Instrument Pack (DIP-4) The digital instrument pack includes the speedometer (including odometer and trip meter) and tachometer (including engine hour meter and outside temperature display), plus a Driver Warnings and Indicators warning light symbols called “telltale” cards. The digital instrument pack receives input data from the VIC via the “I-CAN”...
  • Page 76 Section 7 Electrical Power Distribution Center. Orange Grey Circuit Description Circuit Description WHIT1100-1 PDC Ground YEL2110-0 DIP HL (12V+) WHIT1100-2 PDC Ground YEL_BLK2110-1 DIP HL (24V+) RED3111-0 ECM Power (12V+) YEL2006-0 LH Turn (12V+) RED3111-1 ECM Power (12V+) YEL_BLK2006-1 LH Turn (24V+) RED1510-0 XMSN ECU (12V+) YEL_BLK2007-1...

  • Page 77: Table 7-1. Additional Spare Circuits For Wiring

    Section 7 Electrical To add on a wiring from cab to chassis, it is necessary to pass over the PDC to the converter. The output voltage from cab to a chassis is 24V, but 12V is necessary. The spare circuits are described in Table 7.1, as well as the pins that can be used. Spare Cir- Minimum Circuit...
  • Page 78 Section 7 Electrical Body Builder 9 pin connector CAPACITY FUSE WIRE DE- WIRE WIRE FUNCTION CIRCUIT (AMPERES SCRIPTION COLOR GAUGE NUMBER) Ground WHT2400-8 White Stop LP Stop lamp YEL2601-3 Yellow F18 / 25A Not Connected Not Connected Not Connected Not Connected Tails/Marker LP Tails / markers lamps YEL2422-2...
  • Page 79 Section 7 Electrical PTO Wiring The truck has a PTO installed. Harness P92-3117-0000 has the necessary connectors to install a PTO. Instructions are shown below. Connector to Engine Harness Connector to PTO Valve Connector to PTO Pressure Switch 7-22...
  • Page 80 Section 7 Electrical Remote PTO / Throttle Harness This option provides a connection from the engine ECU to the end of the frame to fit the engine throttle remote control and PTOs. Controls are not provided. A 12-pin Deutsch connector (Deutsch P/N DT06-12SA-P012) is included. Adding Electrical Options WARNING! Follow the engine manufacturer’s guidelines for use of these circuits.

  • Page 81: Appendix A Vehicle Identification

    Chassis Number Locations The Chassis Number comprises the last six characters of the VIN. • The K270/K370 chassis number is shown in multiple locations. Right frame rail, bottom flange (underside), about 4 to 4.5 ft. from the front end: stamped.

  • Page 82: Certification Labels

    Appendix A Vehicle Identification CERTIFICATION LABELS Components and Weights Label The Major Components and Weights Label is located on either the driver’s side door edge or on the door frame. See Figure A–2. It includes: chassis weight and gross weight; plus, model and serial numbers for the vehicle, engine, transmission, and axles.

  • Page 83: Component Identification

    Appendix A Vehicle Identification COMPONENT IDENTIFICATION Each of the following components has their own identification label. Engine Identification The engine dataplate provides important facts about the engine. The engine serial number (ESN) and control parts list (CPL) provide information for service and ordering parts. The engine dataplate must not be changed unless approved by PACCAR Inc. The dataplate is located on rocker lever cover as illustrated.

  • Page 84: Transmission Identification

    Appendix A Vehicle Identification Transmission Identification The transmission identification number is stamped on a tag affixed to the right forward side of the transmission case. It includes, among other specifications, the transmission model, serial, and part number. Front Axle Identification The front axle has an identification tag located on the front axle beam.

  • Page 85: Appendix B Weight Distribution

    Body Length Back of cab to centerline of rear axle The K270/K370 CA figures are measured from the true back of cab to the centerline of the rear Note: axle. To obtain a usable CA the body builder must subtract any required space behind the cab, which may be needed for other equipment.

  • Page 86: Calculations

    Appendix B Weight Distribution CALCULATIONS Weight Distribution without Body There are two primary equations used in weight distribution calculations: The first equation determines the portion of the load carried by the rear axle (Lr). • Lr = Portion of Load Carried by the Rear Axle Equation 1 •...

  • Page 87: Figure B-2. Unbalanced Load: Cgf 133 In. From Front Axle

    Appendix B Weight Distribution In Figure B–2, the load (L) is located 133 in. (3378 mm) from the front axle. Moving the load towards the rear axle changes the weight distribution. Use equations 1 and 2 to determine the portion of the load carried by each axle. 100 lbs Front Axle 133 In.

  • Page 88: Weight Distribution With Body

    RA = 9628.7 K270/K370 with nominal weights and CGs. See your Kenworth Dealer for more exact weights and CGs. It also lists their added weight when installed on the chassis and the location (from the front axle) of the CG of this added weight.

  • Page 89: Figure B-3. Balanced Body Unloaded: Cgf 184.7 In. (4691.45 Mm) From Front Axle

    Appendix B Weight Distribution Now we will calculate the distributed weight of van body that weighs 4825 pounds (2188.5 kg). Since an empty van is very close to a uniform object, you can assume that the CG of the van body is at a point equal to half of the Figure B-3.
  • Page 90 Appendix B Weight Distribution Use CGf = 246 in equations 1 and 2 to determine how the liftgate weight is distributed to the axles. 322.2 Lr = X 1455 = 2190.6 lbs (993.6 kg) Lf = L - Lr 1455 - 2190.6 = -735.6 lbs (-333.6 kg) This negative weight on the front axle illustrates the difference between the distribution of weight (L) mounted behind the rear axle versus in front of the rear axle.

  • Page 91: Complete (Loaded) Vehicle

    3021.0 10046.74 4557.1 16706.9 7578.1 Payload 2169 983.8 5831 2644.8 8000 3628.7 Total Ground Weight 8829.2 4004.8 15877.7 7202 24706.9 11206.9 Chassis Axle Ratings 8948 4058.7 17052 7734.6 26000 11793.4 Table B-2. K270 Weight Distribution and Chassis Rating Calculation (sample...
  • Page 92 Appendix B Weight Distribution K370 sample, Assume that the payload is evenly distributed. Freight that is distributed evenly is referred to as a “water level” load. Our payload total is 14,500 lb. Since it is an evenly distributed “water level” load, its CG loca- tion will be the same as the CG location of the van body.

  • Page 93: Weight Distribution Analysis

    Appendix B Weight Distribution Weight Distribution Analysis The final step is to total all of the front and rear axle weights to ensure that the axles are not overload- Step 5. ed. Table B-4 shows the assembled information in an easy to read format. •...

  • Page 94: Table B-3. Available K270/K370 Body Lengths

    Appendix B Weight Distribution Table B-3. Available K270/K370 Body Lengths Wheelbase In. (mm) Body Length (Ft) 26,000 GVW 33,000 GVW 142 (3606.8) 146 (3708.4) 154 (3911.6) 158 (4013.2) 166 (4216.4) 170 (4318) 178 (4521) 182 (4622.8) 190 (4826) 194 (4927.6) 202 (5130.8)

  • Page 95: Index

    Index Frame, welding Abbreviations, dimensions Front axle serial number Front View Fuel tank locations 3-22 Body mount, rear Body mounting Body mounting with U-bolts Ground clearance 3-23 Brackets, body mounting Incomplete vehicle certification Calculations Incomplete Vehicle Certification Label Cautions Certification label Chassis maintenance Mounting holes, frame Chassis Number...
  • Page 96 ® A DIVISION OF PACCAR Kenworth Truck Company P.O. Box 1000 Kirkland, WA 98083 (425) 828-5000...

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