Peterbilt 320 Operator's Manual

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Quick Table of Contents

PART 1: INTRODUCTION.. ..................................................................... ..........1

PART 2: CAB AND FRAME ACCESS.................................... ............................ 6

PART 3: GETTING TO YOUR ENGINE...... ... ..................................................10

PART 4: CONTROLS AND DISPLAYS............. ....................................... ........15

PART 5: SEAT AND RESTR AINT SYSTEMS.................. ............ ............ ........57

PART 6 : DRIVER’S CHECKLIST.. ...................................... ............................. 69

PART 7: STARTING & OPERATING THE VEHICLE.. .....................................73

PART 8 : MAINTENANCE AND SERVICE.. ................................................... 110

PART 9: VEHICLE IDENTIFICATION NUMBERS.. .......................................196

PART 1 0: CO NSUMER INFORMATION........................................................199

PART 11: SUBJECT INDEX....................................... ....................................202

Other Publications.. ........................................................................................206

California Proposition 65 Warning

• Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.

• Other chemicals in this vehicle are also known to the State of California to cause cancer, birth defects or other reproductive harm.

• Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

PART1: INTRODUCTION HowToFindWhatYouWant

PART 1: INTRODUCTION

This manual contains useful information for the safe and efﬁcient operation of your Model 320. It also provides information on maintaining your vehicle in the best condition, with an outline for performing safety checks and basic preventive maintenance inspections.

We have tried to present the information you’ll need to learn about your vehicle’s functions, controls, and operation and to present it as clearly as possible. We hope you’ll ﬁnd this manual easy to use.

There will be times when you need to take this manual out of your Peterbilt. When you do, please be sure to return it to the cab when you are ﬁnished using it. That way it will be there when you need it the next time or when you pass the vehicle on to the next user.

Your Model 320 may not have all the features or options mentioned in this manual. Therefore, you should pay c areful attention to the instructions that pertain to just your vehicle. In addition, if your vehicle is equipped with special equipment or options not discussed in this manual, consult your dealer or the manufacturer of the equipment.

All information contained in this manual is based on the latest production information available at the time of publication. Peterbilt Motors Company reserves the right to make changes at any time without notice.

HowToFindWhatYouWant

There are several tools built into this manual to help you ﬁnd what you need quickly and easily.

First is the Quick Table of Contents. Located at the front of the manual, this lists the main subjects covered and gives page numbers where you can ﬁnd these subjects. Use the Quick Table of Contents to ﬁnd information on a large subject like "Maintenance."

Cross-referenced Citations also help you get the information you need. If some other part of the manual contains further information on the subject you are reading about, we’ll indica te that in a cross-reference like this: (See " 6: DRIVER’S CHECKLIST". You won’t have to go searching for more information.

Finally you’ll ﬁnd a helpful Subject Index. It’s in the back of the manual and alphabetically lists the subjects covered.

PART

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Additional Sources of Information PART 1: INTRODUCTION

So if you want information on brakes, for example, just look under Brake in the Subject Index. You’ll ﬁnd all the pages listed where brakes or braking are discussed.

A Special Word About Repairs

Your Peterbilt dealer’s service center is the best place to have your vehicle repaired. You can ﬁnd Peterbilt dealers all over the country with the equipment and trained personnel to get you back on the road quickly - and keep you there.

Your vehicle is a complex machine. Anyone attempting repairs on it needs good mechanical training and the proper tools. If you are sure you have these requirements, then you can probably perform some repairs yourself. However, all warranty repairs must be performed by an authorized Peterbilt service fa cility. If you aren’t an experienced mechanic, or don’t have the right equipment, please leave all repairs to an authorized service facility. They are the ones equipped to do the job safely and correctly.

WARNING! Attempting repair work without sufﬁcient training, service manuals, and the proper tools can be dangerous. You could be injured or you could make your truck unsafe. Do only those tasks you are fully qualiﬁed to do.

Maintenance Manuals. Ifyoudodecidetodoanycomplex repair work, you’ll need the Peterbilt Maintenance manuals. Order them from your authorized dealer. Please provide your Chassis Serial Number when you order, to be sure you get the correct manuals for your vehicle. Allow about four weeks for delivery. There will be a charge for these manuals.

Final Chassis Bill of Material. A complete, nonillustrated computer printout listing of the parts used to custom- b uild your Peterbilt vehicle is available through the Peterbilt dealer from whom your purchased your veh icle.

WARNING! Modifying your vehicle can make it unsafe. Some modiﬁcations can affect your truck’s electrical system, stability, or other important functions. Before modifying your vehicle, check with your dealer to ma ke s u re it can be done safely.

Additional Sources of Information

Operator’s manuals are also supplied by the m a nufacturers of components such as the engine, seats, transmission, and radio in your Peterbilt. If you are missing any of these manuals, ask your Peterbilt dealer to supply them.

– 2 – Y53-6015 R(08/07)

PART 1: INTRODUCTION Warnings

Your new Peterbilt also contains a copy of the Truck Driver’s Handbook, published by the American Trucking Association. Refer to it for important information on driving your vehicle. Another place to learn more about trucking is a local truck driving school. Contact one near you to ﬁnd out what kinds of instruction it offers.

Federal and state agencies also have information you can ask for. The Interstate Commerce Commission can give you information about regulations governing transportation across state lines. And various agencies in state governments are sources for regulations which differ from state to state.

Warnings

We’ve put a number of warning messages in this manual. They are there for your protection and information. Please read them and follow them. They can help you to avoid injury to yourself and your passengers as well as to prevent costly damage to your vehicle. We’ve used certain symbols and "signal words" to indicate what kind of message is going to follow. When you see these symbols & words, you know that you need to pay special attention. Please don’t ignore any of these signals.

WARNING:

When you see this symbol & word, the message that follows is especially vital. This signals something that can cause serious injury or death. This message will tell you what the hazard is, what can happen if you don’t heed the warning, and how to avoid it. For example:

WARNING! Attempting repair work without sufﬁcient training, service manuals, and the proper tools can be dangerous. You could be injured or you could make your vehicle unsafe. Do only those tasks you are fully qualiﬁed to do.

CAUTION:

This symbol & word signals something that could damage your vehicle. You might receive an injury, too. For example:

CAUTION: Continuing to operate a vehicle with insufﬁcient oil pressure will cause serious engine damage.

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Vehicle Safety PART 1: INTRODUCTION

NOTE:

Gives you information we feel you’d like to have. It could have to do with care of your vehicle or with driving more efﬁciently:

NOTE: A cold compressor can cause refrigerant to liquefyandwarpthevalveplatesorcauseahydraulic lock. Warm the engine before starting the air conditioner.

Please take the time to read these messages when you see them. And remember:

WARNING! Something that could injure you seriously.

CAUTION: Something that could cause injury to you or your vehicle.

NOTE: Useful information.

Vehicle Safety

Make sure your Peterbilt is in top working condition before heading out on the road—it is the responsible driver’s

duty to do so. Inspect the vehicle according to" DRIVER’S CHECKLIST".

WARNING! The use of alcohol, drugs, and certain medications will seriously impair perception, reactions, and driving ability. These circumstances can substantially increase the risk of an accident and personal injury.

Please remember, this manual is not a training manual. It cannot tell you everything you need to know about driving your Peterbilt vehicle. For that you need a good training program or truck driving school. If you have not been trained, get the proper training before you drive. Only qualiﬁed drivers should drive this vehicle.

Every new Peterbilt vehicle is designed to conform to all Federal Motor Vehicle Safety Standards applicable at the

PART 6:

– 4 – Y53-6015 R(08/07)

PART 1: INTRODUCTION Vehicle Safety

time of manufacture. However, even with these safety features, continued safe and reliable operation depends greatly upon regular vehicle maintenance. The vehicle

must be operated within the range of its mechanical capabilities and the limits of its load ratings. Se e the axle and tire load rating information located on the driver’s door jamb.

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PART 2: CAB AND FRAME ACCESS

Be careful whenever you get into or out of your vehicle’s cab. Always maintain at least three points of contact with your hands on the grab handles and your feet on the steps.

WARNING! Jumping out of the cab or getting into the cab without proper caution is dangerous. You could slip and fall, possibly suffering a serious injury. Keep steps clean. Clean any fuel, oil, or grease off of the steps before entering the cab. Use the steps and grab handles provided, and always keep at least three points of contact between your hands and feet and the truck. Look where you are going.

The following pictures show the best way to enter and exit a Model 320.

PART 2: CAB AND FRAME ACC ESS

02871

Three points of contact as you begin or ﬁnish

– 6 – Y53-6015 R(08/07)

PART 2: CAB AND FRAME ACCESS Door Lock and Keys

02872

Three points of contact as you climb up or down

Three points of contact as you step in or out

02873

Door Lock and Keys

Doors can be locked from the inside by using the lock button. Close the door then push the button down to lo c k. Doors automatically unlock when you open them from the inside,andcanbelockedfromtheoutsidewithakeyonly.

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Climbing Onto the Deck Plate PART 2: CAB AND FRAME ACCESS

WARNING! To lessen the chance and/or severity of personal injury in case of an accident, always lock the doors while driving. Along with using the lap/shoulder belts properly, locking the doors helps prevent occupants from being thrown from the vehicle.

To lock or unlock the doors from outside the cab, insert the key in the lock. Turn the key toward the rear to lock; forward to unlock.

Climbing Onto the Deck Plate

WARNING!

• You can be hurt if you aren’t careful climbing onto and off the deck plate. You can slip and fall, especially if the surfaces are wet or

icy, or if you step in oil, fuel, or grease. Keep steps clean. Always maintain at least three points of contact between your hands and feet and the steps and deck plate.

• Do not climb onto and off the deck plate– use steps and grab handle provided. If there is no deck plate, or if proper steps and grab handles aren’t provided, don’t climb onto the area behind the cab. Peterbilt did not intend for the area to be a step if handrails or proper steps are not provided.

NOTE: Any alteration (adding bulkheads, headache racks, tool boxes, etc.) that affects the utilization of grab handles, deck plates, or frame access steps installed by Peterbilt must comply with FMCSR 399.

– 8 – Y53-6015 R(08/07)

PART 2: CAB AND FRAME ACCESS Front Cab Guard/Ladder

Front Cab Guard/Ladder

The optional front cab guard/ladder is used on front-loading refuse vehicles to protect the cab from damage and to stand on in order to remove debris from above the cab.

0001

WARNING!

• Do not climb on the cab roof. The cab roof is not a slip-resistant surface and is not equipped with handholds. A slip and fall could cause serious injury.

• Do not step or stand on the top rung of the ladder. This is not a step; it is meant to used only as a handhold. You could slip or fall and injureyourselfifyouuseitasastep.

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Cab Tilting PART 3: GETTING TO YOUR ENGINE

PART 3: GETTING TO YOUR ENGINE

Cab Tilting

WARNING! You can be seriously injured by the cab if you do not follow safety precautions. Whenever you raise or lower the cab, or when you work under the cab, please remember the following safety rules:

• Be sure no one is under the front of the cab. Whether you are raising or lowering the cab, KEEP CLEAR.

• Never work under a raised cab unless it is properly supported. This means use an overheadhoistofsufﬁcient capacity to support the cab safely. Never prop the cab up instead of using a hoist. The prop could fail and let the cab fall on you or anyone else working under the cab.

• Always be sure the safety latch is engaged when you or anyone else works under the cab.

– 10 – Y53-6015 R(08/07)

• Perform work only when the cab is in the mechanically locked position or in the full tilt position.

• When your cab’s hydraulic system needs service or repair:

• Have maintenance an d repair don e o nly by

someone qualiﬁed in hydraulic systems.

• Besurenoonetriestobleedthesystem

with the cab raised. This will defeat the safety system. The cab can fall and crush anyone under it.

• Do not tamper with any part of the cab tilt

cylinders, including removing the velocity fuses. To do so will defeat their purpose. The cab could fall and crush anyone under it. If you have any need for repair involving the velocity fuses, have a qualiﬁed truck mechanic do the work.

NOTE: In case of oil loss in the system or a lockup in the tilt cylinders, refer to the maintenance manual for repair instructions.

PART 3: GETTING TO YOUR ENGINE Raising the Cab

Raising the Cab

An independent hydraulic system raises and lowers the cab. A positive, dual-locking device ensures safety and eliminates danger of mishaps while driving.

WARNING! Do not get any part of your body under an unsecured cab. It could cause a serious or fatal accident. The cab could fall and crush you. Always ensure the locking bar is fully engaged before getting under the cab, or before letting anyone else get under it (see following instructions on using the locking bar).

WARNING!

• Raising the cab with heavy objects in the cab can cause serious damage to the cab tilting mechanism and cab. Before raising the cab, remove heavy items su ch as tire chai n s and tools. Remove or stow securely any loose items. And shut the doors tightly.

• Straighten the front wheels before tilting the cab or cab/tire damage could occur.

The following cab tilting instructions are labelled and installed on the base of the companion seat:

1. Park the vehicle on a level surface.

2. Apply the parking brake.

3. Make sure the shift lever is in Neutral. This will prevent the shift lever from getting caught on the cab during tilting operations.

4. Secure or remove all loose items in the cab. Close all doors.

5. Check the clearance above and ahead of the cab. Ensure there will be enough room to clear roof antennae when you tilt the cab. Check for obs tructions overhead (branches, power lines, lights, etc.) and in front (walls, work benches, other vehicles, etc.).

6. Place the control valve handle in the "Raise" position.

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Raising the Cab PART 3: GETTING TO YOUR ENGINE

02874

Handle in "Raise" Position

02875

Locking Bar in Anchored Position

7. Attach pump handle to the pump and pump to raise the cab (the latch hooks will release automatically when pump is actuated). Pump until the locking bar can be positioned on the anchor mounted below the right-

8. Place the control valve handle in the “Lower” position and allow the cab to settle down slightly on the locking bar.

hand cab suppo rt as shown in the next illustration.

– 12 – Y53-6015 R(08/07)

PART 3: GETTING TO YOUR ENGINE Lowering the Cab

02876

Handle in "Lower" Position

02877

CabinFullTiltPosition

Lowering the Cab

1. Place the control valve handle in the "Raise" position and pump until the locking bar can be removed from the anchor and fastened in its stored position.

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Lowering the Cab PART 3: GETTING TO YOUR ENGINE

02878

Locking Bar In Stored Position

Upper and Lower Rear Cab Mount

02879

3. Allow at least 20 seconds after the cab touches down

CAUTION: Do not try to pump the cab down or hold it down with hydraulic force. If you do, cab damage will occur.

2. Place the control valve handle in the "Lower" position. The cab should settle down on the rear mounts.

for the full spring force to develop in the latch hooks in the rear mounts.

4. Remove the pump handle and store in the cab.

5. Visually inspect the cab latch hooks to ensure they are closed.

6. Ensure that the control valve handle is in the “Lower” position when operating the vehicle.

– 14 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Your Instrument Panel

PART 4: CONTROLS AND DISP LAYS

This part explains the location of the various features on your vehicle and describes their function. For inform at ion on using these features in driving, see the paragraphs that follow.

Your Instrument Panel

Please remember that each Peterbilt is custom-made. Your instrument panel may not look exactly like the one in the illustrations on the pages that follow.

We have tried to describe all the most common features and controls available, so your vehicle may not have some of the ones that appear in this section. You can pick out the parts that apply to you and read them to be fully informed on how your particular vehicle operates.

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Your Instrument Panel PART 4: CONTROLS AND DISPLAYS

LEFT SIDE

0002

Typical Instruments & C ontrols: Left-Hand Drive Station

1. Turn Signal/Hazard Flasher

2. Accelerator Pedal

3. Brake Pedal

4. High Beam Switch

5. Clutch Pedal

6. Ignition Key Switch

7. Clearance Lamps Switch

8. SMC Select/Reset Switch

9. Headlight Switch

10. Voltmeter

11. Engine Oil Pressure

12. Engine Coolant Temperature

13. Tachometer

14. LED Warning Light Ba r

15. Panel Light Knob

16. Speedometer w/ Message Center (SMC)

17. Primary Air Pressure

18. Fuel

19. Transmission Oil Temp.

20. Secondary Air Pressure

21. Gearshift or Shift Selector

22. Heater Control Panel

23. Cigar Lighter

24. Interaxle Differential Lock

25. Parking Brake Valve

26. Windshield Wiper Valves

27. Windshield Washer Switch

– 16 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Warning Alarms

RIGHT SIDE

0003

Typical Instruments & Controls: Right-Hand Drive Station

1. Turn Signal/Hazard Flasher

2. Transmission Controls

3. Parking Brake Valve

4. Horn Button

5. Windshield Washer Reservoir

6. Working Brake Switch

7. Warning Lights

8. Headlight Switch

9. Secondary Air Pressure

10. Starter Switch

11. Stop Switch

12. Prim a ry Air Pressure

13. Engine Oil Pressure

14. Safety Chain

15. Bra ke Pedal

16. Accelerator Pedal

Warning Alarms

A warning alarm occurs when some condition in the vehicle requires attention. A warning alarm cannot be turned off or manually reset. Once triggered, an alarm w ill continue to exist until the unacceptable condition or fault in a function is corrected.

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Warning Alarms PART 4: CONTROLS AND DISPLAYS

NOTE:Inadditiontothewarningmessagesmentioned in this part - if any of the following conditions occur after startup and self-test, the multiplex instrumentation system should be serviced

• The speedometer-message center (SMC) pointer exhibits windshield wipe r-like motion and the display reads NO DATA

• One or more gauge pointers exhibit wiper-like motion.

• A gauge pointer stays at zero with its red light ﬂashing.

• A gauge pointer goes to and remains at a 2:00 position with its red light on steady.

A multiple x instrumentation system alarm can be sign a lled by up to four indicators:

• A warning message will appear on the SMC display (all alarms).

• The light-emitting diode (LED) warning light in the function’s gauge will go on (all alarms except ABS and multiplex instrumentation system faults).

• An audible alarm will sound.

• A light bar icon will light.

NOTE:

• Warning messages from system alarms with an audible alarm can be temporarily overridden by pressing the Reset switch. You can then press the Select switch to scroll through other functions

- but the message will reappear in 60 seconds. The audible alarm will always be on.

• Warning messages from system alarms without an audible alarm can be dismissed by pressing the Reset switch. To view dismissed active messages, turn the ignition off and back on.

An alarm’s warning message on the SMC will preemp t all other SMC displays until the condition that is causing the alarm is corrected. T his preemption includes other warning messages from earlier alarms - and some of these alarms may not have other indicators. Therefore, it is very important that you check the SMC to be aware of all alarm conditions that may exist in your vehicle’s systems - especially during the start-up procedure. A summary of alarms and indicators is at the end of this part. Follow this procedure to check all SMC warning messages.

1. Obse rve the ﬁrst message displayed after the SMC comes on.

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PART 4: CONTROLS AND DISPLAYS Warning Alarms

• If the odometer is displayed, continue with the start-up procedure.

• If a warning m essage is displayed instead of the odometer, it is being generated by the multiplex instrumentation syste m:

– Look in the alarm summary to identify the gauge.

– Go to the description of that gauge in"

PART 4: CONTROLS AND DISPLAYS" and take the actions indicated to correct the condition.

2. Continue to check and act on all warning messages until the odometer is displayed.

Multiplex Instrumentation System Alarm Summary

Display Activation

Condition

H2O TMP Coolant

temp. is high

IM CAL System Fault

IM CFG System Fault

Gauge LED

Engine Water

Temperature

None

Buzz Deactivation

yes

Display

H2OT OK

None

Display Activation

IM DIAG System Fault

IM LIN

IM SLFT System Fault

LOW AIR1

LOW AIR2

WATER

NO DATA System Fault

ODO ERR System Fault

OIL TMP

OIL PRES

Condition

System Fault

Low air

pressure in

air tank #1

Low air

pressure in

air tank #2

Coolant level

is low

Engine oil

temperature

is high

Engine oil

pressure is

low

Gauge LED

None

Primary air

pressure

Secondary

air pressure

Engine Water

Level

None

Engine Oil

Temperature

Engine Oil

Pressure

Buzz Deactivation

yes

Display

None

AIR1 OK

AIR2 OK

WATER O K

None

OILT OK

OIL OK

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Turn Signal and Indicator Lights PART 4: CONTROLS AND DISPLAYS

Display Activation

SMC MEM

TRANTMP Main

Condition

System Fault

transmission

oil

temperature

is high

Gauge LED

None

Main

Transmission

Oil

Temperature

Buzz Deactivation

yes

Display

None

TRAN OK

Steering Column-Mounted Controls

Turn Signal and Indicator L igh ts

02882

Turn Signal

The turn signal body is mounted on the left side of the steering column, below the steering wheel.

• At a right-hand drive station, the turn signal body is mounted on a stub shaft under the dash behind the steering wheel.

– 20 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS High Beam Headlights

other vehicle could run into you if you do not set

NOTE: The ignition key must be turned to ON for the signal/switch to operate.

To operate either signal, move the lever in the direction of the turn.

Of course, in normal stopping in trafﬁc, such as at a stop light, you do not use your ﬂashers.

your ﬂashers. Always move the vehicle a safe distance off the road when stalled or stopped for repairs

Hazard Flasher

The four-way Hazard Flasher switch is on the turn signal body, just below the turn signal lever.

• At a right-hand drive station, the switch is above the lever.

The ﬂasher will operate with the key switch in the on or off position. Pull it out to activate the system. All turn signals will ﬂash at once. To turn it off, move the turn signal lever up or down.

Use your hazard ﬂasher whenever you are off the road or on the side of the road, or in a potentially hazardous situation.

WARNING! Use your Hazard Flasher Warning System any time you have to stop off the road or on the side of the road, day or night. A hard to see vehicle can result in an injury accident. An-

High Beam Headlights

All Model 320 vehicles c o me equipped with a co mbination turn signal and high beam / low beam switch that is mounted to the steering column. To switch your headlights, push and release the button on the end of the turn signal lever. The high beam indicator light is displayed in the tachometer face

WARNING! Your disabled vehicle can be dangerous for you and others. The hot exhaust system could ignite dry grass, spilled fuel, or other substances. Do not park or operate your vehicle w here the exhaust system could contact dry grass, brush, spilled fuel, or any other material that could cause a ﬁre.

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Trailer Brake Hand Valve PART 4: CONTROLS AND DISPLAYS

Trailer Brake Hand Valve

02885

02884

High Beam Headlight Switch Button

If your vehicle is a tractor, it will be equipped with a trailer brake hand valve. This hand valve provides air pressure to apply the trailer brakes only. It operates independently of the foot treadle valve.

To operate the trailer brake hand valve: Pull down on the lever on the right side of the steering column, below the steering wheel.

Trailer B rak e Hand Valve

– 22 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Electric Horn

WARNING! It is dangerous to use air-applied trailer brakes for parking or holding a vehicle. Air system pressure can bleed down and release the brakes. You could have a vehicle rollaway resulting in an accident. You or others could be badly injured. Always apply the parking brakes for parking or holding your vehicle on grade.

NOTE: The traile r brake is not to be use d as the main means of braking. To use this brake frequently instead of using the foot brake will wear out the trailer brake sooner.

See "

Parking Brakes and Their Use" for more complete information on when and how to use your trailer brake. Or see the Index, under Brake.

Electric Horn Button

Air Horn

Your Pe te rbilt has an a ir horn in addition to an electric horn.

02886

Control the air horn by pulling on the lanyard exten ding from

Electric Horn

the overhead header panel.

Your vehicle has an electric horn. To sound the horn, press on the button in the center of the steering wheel. At a righthand stand-up drive station, the horn button is located on the dash panel to the right of the steering wheel.

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Ignition Switch PART 4: CONTROLS AND DISPLAYS

Dash-Mounted Features

Keys and Locks

The same key operates the ignition and opens the doors. Frame-mounted tool box locks and locking fuel tank caps each have individual keys.

Ignition Switch

Your ignition switch has four positions:

• OFF: In this (center) position, all accessories are off (except those listed below), and you can remove the key:

– Brake lights

– Panel lights

– Tail lights

– Cigarette lighter

– Clearance lamps

–Horn

– Headlights

– R adio station memory

– Emergency hazard ﬂasher – A uxiliary power – Dome light

This is the key position that w ill stop the engine from the left-hand drive stat ion.

• ACC (Accessory): In this position (to the left of center), you can play the radio or use other accessories, but your engine won’t start.

• ON: In this position (to the right of center), all circuits except the cranking circuit are energiz ed. The warning light bar and the multiplex instrument system will begin its start-up (self-test) p rocedure. In this switch position, the key cannot be removed.

• START: When the key is turned and held in this position (full right of center), the starter motor will engage and crank the engine. Also, it is not uncommon for some or all of the multiplex instrument system gauges to begin their start-up procedure again. This is due to the drop in the system voltage during engine cranking.

NOTE: The multiplex instrument system start-up (self-test) procedure is described in " STARTING & OPERATING THE VEHICLE" of this manual.

PART 7:

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PART 4: CONTROLS AND DISPLAYS Manual Override for Engine Shutdown

Starter Button

02887

With the ignition switch ON, pushing this button at the righthand drive station will perform the same function as turning the key to the START position at the left-hand drive station.

Stop Button

02888

Pushing this button at the right-hand drive station stops the engine.

Manual Override for Engine Shutdown

03020

On vehicles with an engine shutdown, you will have to hold the manual throw switch in the UP position until normal engine pressures are reached. If you have one of these systems, a label on the control panel will say so.

For detailed s tarting procedures, see the Index, under Starting And Operating.

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Panel Light Knob PART 4: CONTROLS AND DISPLAYS

Headlights

02890

The headlights are controlled by the control panel switch(es) showing the above symbol. When the headlights are ON, the dash lights, side, and tail lamps are also on.

WARNING! Do not use daytime running lights (DRL) during periods of darkness or reduced visibility. Do not use DRL as a substitute for headlights or other lights during operations that require lighting of your vehicle. Doing so could lead to an injury accident.

NOTE: On vehicles equipped with daytime running lights (DRL), the high-beam headlamps go on automatically at reduced brightness if the engine is running and the headlamp s witch is turned off. The

daytime running lights are turned off automatically while the parking brake is engaged. If the headlamp switch is turned on, the DRL system is overridden & headlamps operate normally.

Panel Light Knob

02891

The Panel Light Knob lets you vary the brightness of your instrument panel lights.

To Operate Your Panel Light Knob:

1. Turn on either the headlights, c learance lights, or fog / driving lights.

2. To brighten the instrument panel lights, turn the knob clockwise.

3. To dim the instrument lights or to turn them off, turn the knob counterclockwise.

– 26 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Fog/Driving Lights Switch

ID and Clearance Lights Switch

02892

These are the amber lights on top of your cab, the lights on the front and sides of the trailer and the red lights on the rear of a truck or trailer. They are controlled by the control panel switch shown above.

Fog/Driving Lights Switch

03021

If your vehicle has fog lights, turn them ON or OFF with the control panel switch shown above.

NOTE: State requirements vary as to when high beams and fog lights can and cannot be used together. Further, some states allow only four lights to be used together; some allow more. Whether you have dual or composite lights will affect how many lights you can have on at one time. Always comply with the state requirements where you are driving.

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Windshield Wipers and Washers PART 4: CONTROLS AND DISPLAYS

Dome Light Switch

ENGINEER - 16-04 492

A two-position switch controls each dome light.

Windshield Wipers and Washers

02895

Wiper

To turn on the wiper(s), rotate the knob(s) clockwise. As the knob is rotated, the speed of the wiper increases. To turn off the wiper, rotate the knob counterclockwise.

Washer

To use the washer, push the button on the control panel showing this symbol.

02896

WARNING! Do not drive with worn or dirty wiper blades. They can reduce visibility, making driving hazardous. Clean blades regularly to remove road ﬁlm and wax build-up. Use an alcohol based cleaning solution and a lint-free cloth, and wipe along the blades.

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PART 4: CONTROLS AND DISPLAYS Air Suspension DeﬂateSwitch(DumpValve)

CAUTION: Do not use antifreeze or engine coolant in the windshield washer reservoir— damage to seals and other components will result.

Air Suspension Deﬂate Switch (Dump Valve)

03035

If your vehicle is a tractor with a rear air suspension, it may have an air suspension deﬂationswitchonthedashthat

allows the air in the suspension to be exhausted. The purpose of this feature is to allow you to lower your tractor to get under a trailer.

You will notice a guard over the switch. This prevents you from accidentally deﬂating the suspension.

WARNING! Operating the Air Suspension Deﬂate Switch (Dump Valve) while driving can lead to an accident. Sudden deﬂation while your vehicle is moving can affect handling and control. Use this switch only when your vehicle is not moving.

CAUTION: Operating a vehicle with air suspension bags either overinﬂated or underinﬂated may cause damage to driveline components. If a vehicle must be operated under such conditions, do not exceed 5 mph.

R(08/07) Y53-6015 – 29 –

Air Suspension Deﬂate Switch (Dump Valve) PART 4: CONTROLS AND DISPLAYS

Engine Fan Switch

03023

The engine fan switch allows you to control the engine fan manually or autom atically. W ith the ignition key switch ON and the fan switch in the ON position, the engine fan will be on regardless of engine temperature. With the engine fanswitchintheAUTOMATICposition,theenginefanwill automatically turn on when the engine coolant reaches a temperature of about 200° F (93° C).

WARNING! Do not work on the fan with the engine running. Anyone near the engine fan when it turns on could be badly injured. If it is set at ON, it will turn on any time the ignition key switch is turned to the ON position. In AUTOMATIC, it could engage suddenly without warning. Before turning on the ignition or switching from AUTOMATIC to O N, be sure no one is near the fan.

CAUTION: The fan or equipment near it could be damaged if the fan turns on suddenly when you don’t expect it. Keep all tools and equipment away from the fan.

NOTE: Do not operate the engine fan in the manual (ON) position for extended periods of time. The fan hub was designed for intermittent operation. Sustained operation will shorten the fan hub’s service life as well as reduce fuel economy.

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PART 4: CONTROLS AND DISPLAYS Mirror Heat S w it c h

Power Mirror Switch

03024

The power mirror control controls the adjustment o f the right or left outside mirrors, depending on the option selected.

WARNING! Convex mirrors can distort images and make objects appe ar smaller and farther away than they really are. You could have an accident if you are too close to another vehicle or other object. Keep plenty of space between your vehicle and others when you turn or

change lanes. Remember that other objects are closer than they may appear.

NOTE: The Power Mirror Switch does not control the adjustment of the convex mirrors

Mirror Heat Switch

03022

Mirror heat is controlled by the control panel switch shown above. If the vehicle is equipped with this switch, mirror heatcanbeswitchedontohelpremovefrostandicefrom the mirror glass.

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Engine Brake PART 4: CONTROLS AND DISPLAYS

Cruise Control Switch

The master switch turns the cruise control ON or OFF. The second switch allows you to SET the desired speed or RESUME the desired speed after the cruise control function has been interrupted.

03025_26

WARNING! Do not operate the cruise control when operating on road surfaces with poor traction (wet, icy, or snow covered roads) or in heavy trafﬁc. Accelerations caused by the normal operation of the cruise control could cause

you to lose control of the vehicle resulting in an injury accident.

NOTE: Cruise control functions and features may vary depending upon which engine you have. For speciﬁc explanation of your cruise control, see th e cruise control or engine manual included with your vehicle.

Engine Brake

03028

– 32 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Interaxle Differential Lock Switch

When an engine brake is energized, the power-producing diesel engine is converted into a powe r-absorbing air compressor to retard the vehicle.

• The brake is energized whenever the driver’s foot is completely removed from the accelerator pedal.

• The brake is deenergized during driving by pressure on the accelerator pedal, and during shifting by depressing the clutch pedal.

The ON/OFF toggle switch turns the system ON or OFF.

• In Caterpillar and C ummins L10-powered vehicles equipped with a Jacobs Engine Brake, a second, two-mode switch is incorporated in the instrument panel. With this system, you can select either LOW or HIGH retarding.

For more information on when and how to use the engine brake in your vehicle, see the owner ’s manual for the engine brake that is included with your vehicle.

WARNING! Using the engine brake when operating on surfaces with poor traction (such as wet or icy, slippery roads or gravel) could cause loss of control.

Interaxle Differential Lock S witch

03029

The interaxle differential allows differential action between the forward rear and the rear driving axles. The interaxle differential lock switch allows the operator to LOCK or UNLOCK the differential. There is a guard over this switch to prevent you from accidentally activating the lock.

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Fifth Wheel Lock (Slider Adjustment) Switch PART 4: CONTROLS AND DISPLAYS

WARNING! Placing the differential lock in the “LOCK” position while your wheels are spinning could cause loss of control or axle damage. You could be hurt. Switch to “LOCK” only when your wheels are not spinning.

See "

Interaxle Differential" for more information on using

your interaxle differential.

Two-Speed Rear Axle (Range) Switch

03030

If your vehicle is equipped with a two-speed rear axle, you can select the axle range by the dash-mounted switch shown above. The low range provides maximum torque for operating off-highway. The high range is a faster ratio

for highway speeds. There is a guard over this switch to prevent you from accidentally changing speeds.

For information on how to operate your two-speed rear axle properly and safely, see " ING TH E VEHICLE" or check the Index, under Two-Speed Rear Axle (Range) Switch 29.

PART 7: STARTING & OPERAT-

Fifth Wheel Lock (Slider Adjustment) Switch

03031

Vehicles having an air-slide ﬁfth wheel have a ﬁfth wheel slider lock controlled by a switch on the instrument panel.

– 34 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Parking Brake Valve and Trailer Air Supply Valve

By placing the switch in the unlock position, you can slide the ﬁfth wheel to various positions to adjust weight distribution.

There is a guard over this switch to protect you against accidentally activating or releasing the lock.

WARNING! Do not move the ﬁfth wheel w hile the tractor-trailer is in motion. Movement of the ﬁfth wheel while a tractor-trailer is moving can cause a serious accident. Your load could shift suddenly, causing you to lose control of the vehicle. Never operate the vehicle with the switch in the unlock position. Always inspect the ﬁfth wheel after you lock the switch to be sure the ﬁfth wheel is engaged.

Parking Brake Valve and Trailer Air Supply Valve

02908

Single Valve

Your parking brake va lve is a yellow diamond-shaped knob located on the right-hand control panel. It controls the parking brakes for either straight truck or tractor-trailer combinations.

• At a right-hand drive station, a second single valve is located on the dash to the left of the steering wheel.

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Heating And Air Conditioning Controls PART 4: CONTROLS AND DISPLAYS

If your vehicle is a tractor, a red, octagonal-shaped knob will be next to the parking brake valve on the right-hand control panel. This is the trailer air supply valve for selecting operation with or without a trailer

02909

Two-Valve System

• To apply all parking brakes, pull the yellow, or parking brake, knob out. The truck or tractor parking brakes will set. If equipped, the Trailer Air Supply Valve (red octagonal knob) will automatically trip (“pop out”) and set the trailer parking brakes.

• To release truck parking brakes, push in the yellow knob. If a tractor with trailer, push in both the yellow and the red knobs.

For full information on parking bra kes, see the Index, und e r Brake.

WARNING! Stopping with the parking brake controls can cause a sudden wheel lock-up, loss of control, or can cause you to be overtaken by following vehicles. You could be severely injured. Never pull out the parking brake valve while the vehicle is moving.

Heating And Air Conditioning Controls

WARNING! Exhaust fumes from the engine contain carbon monoxide, a colorless and odorless gas. Do not breathe the engine exhaust gas. A poorly maintained, damaged or corroded exhaust system can allow carbon monoxide to enter the cab. Entry of carbon monoxide into the cab is also possible from other vehicles nearby. Failure to properly maintain your vehicle could cause carbon monoxide to enter the cab and cause serious illness.

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PART 4: CONTROLS AND DISPLAYS Heating And Air Conditioning Controls

CAUTION: Never idle your vehicle for prolonged periods of time if you sense that exhaust fumes are entering the cab. Investigate the cause of the fumes and correct it as soon as possible. If the vehicle must be driven under these conditions, drive only with the windows slightly open. Failure to repair the source of the exhaust fumes may lead to personal harm.

NOTE: Keep the engine exhaust system and the vehicle’s ventilation system properly maintained. It is recommended that the vehicle’s exhaust system and cab be inspected

• by a competen t technician every 15,000 miles

• when a change is noticed in the sound of the exhaust system

• if the exhaust system, underbody, or cab is damaged

NOTE: To allow for proper operation of the vehicle ventilation system, keep the inlet grille at the base of the windshield clear of snow, ice, leaves and other obstructions at all times.

NOTE: Do not stay in the vehicle with the engine running or idling for more than 10 minutes with the vehicle’s Heater / AC v entilation system in RECIRC or at LOW FAN SPEED. Even with the ventilation system On, running the engine while parked or stopped for prolonged periods of time is not recommended.

NOTE: If you are required to idle your vehicle for long periods of time, install an auxiliary heater or automatic idle control. These auxiliary devices can reduce fuel consumption and save you money.

NOTE: When idling for short periods of time

• Set the heating or cooling system to Heat or A/C

• Set the fan to Medium or High speed

• Set the controls to FRESH AIR

NOTE: If other vehicles are parked next to you idling, move your vehicle or do not stay in your vehicle for prolonged periods of time.

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Heating And Air Conditioning Controls PART 4: CONTROLS AND DISPLAYS

Heating System

The heating system is a variable-coolant - ﬂow type of system.

• Hot engine coolant is circulated by the engine water pump through a heater core within the heater unit.

• Two blowers force air through the core and into the cab.

The amount of heat is controlled by:

02981A

• the position of the modulating water valve that regulates hot engine coolant ﬂow

• the choice of fresh air or recirculated cab interior air as feed air to the blowers

• the speed of the blowers

The system’s controls are mounted in the header in front of the driver. They include the following (see illustration below):

• A rotary knob to operate the modulating water valve (for air temperature control), located in the heater con-

Next to the rotary k nobs, two switches are available for the following functions:

• A switch to select either fresh air or recirculated cab air as blower feed air.

• A switch to select cab interior or defrost vents for heated air output.

To heat the cab, select the "Cab” mode and the desired air source, then adjust the air temperature lever and blower speed until comfortable.

trol head.

• A rotary switch to select blower speed, located in the heater control head.

– 38 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Heating And Air Conditioning Controls

WARNING! Do not drive with visibility reduced by fog, condensation, or frost on the windshield. Your view may be obscured, which could result in an injury accident. For clear visibility and safe driving it is extremely important for you to follow the instructions pertaining to the function and use of the ventilation/heating and defogging/ defrosting system. If in doubt, consult your dealer. Maximum heating output and fast defrosting can be obtained only after the engine has reached operating temperature.

CAUTION: During extreme cold weather, do not blow hot defroster air onto cold windshields. This could crack the glass. Turn the air ﬂow control lever to Defrost and adjust the fan speed accordingly while the engine warms. If the engine is already warm, move the temperature selector to Cool, then gradually increase the temperature when you see that the windshield is starting to warm up.

CAUTION:

• A cold compressor can cause refrigerant to liquefy and warp the valve plates or cause a hydraulic lock. Warm the engine before starting the air conditioner.

• To avoid damage to the compressor & blower motors, turn off all controls when a system is not in use.

NOTE: Air registers are located on both sides of the cab. They may be positioned to clear (defrost) the side windows. Closing these nonwindshield registers may help to defrost the windshield quicker.

• To defrost the windshield, select the "Defrost” mode

and the desired air source, then set the air temperature lever to “Hot” and the blower speed to “High.” [Note: If yourvehicleisequippedwitharoofmountedairconditioner, turn the air conditioner switch on.] When the windshield is clear, adjust the temperature and blower speed until comfortable.

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Heating And Air Conditioning Controls PART 4: CONTROLS AND DISPLAYS

Air Conditioning System

Your vehicle may be equipped with either of two air conditioning systems. Cab interior air is continuously recirculated and cooled by these systems. In both systems, the compressor, receiver-dryer, and condenser are located in the engine compartment. (Note: In some applications, the condenser may be mounted on the cab roof.)

Dash-mounted System

02981A

In one system, the evaporator and blower are located inside the heater unit, under the passenger dashboard. Controls for this system are located in a modiﬁed heater control head.

To cool the cab, turn on the air conditioning system, then adjust the air temperature and blower speed until comfortable. The amount of cooling is controlled by

• the temperature of the evaporator core

• the speed of the blower that forces air through the core andintothecab

• the amount of heat added to the recirculated cab air by the air temperature control

Ceiling-mounted System

In another system, the evaporator and blower are located in a ceiling-moun te d unit. This system’s control panel is

– 40 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Heating And Air Conditioning Controls

mounted in the cover piece of the unit located in the cab ceiling. It contains a rotary switch to select blower speed (see next illustration).

JPR033

To cool the cab, turn on the air conditioning system and adjust the blower speed until comfortable. The amount of cooling is controlled by

• the temperature of the evaporator core

• the speed of the blower that forces air through the core and into the cab

NOTE: When the air conditioner isn’t in regular use, operate it for at least 15 minutes once a month. This will lubricate the seals in the system

For More Efﬁcient Heating and Cooling...

• For immediate heating of a cold cab, operate the heating system with the “Fresh/Recirc” switch in the “Recirc” position. Switch to the “Fresh” position when the cab has reached a comfortable temperature.

• For immediate cooling of a hot cab, initially open a cab window. For maximum summertime cooling, both heater control valves on the engine should be shut (if so equipped).

• For both heating & cooling, use lower blower speeds and intermediate temperature selector positions to modulate cab temperature.

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Gauges And Displays PART 4: CONTROLS AND DISPLAYS

Cigarette Lighter

02912

To operate your lighter, push the knob in. After a few moments the lighter will automatically pop out, ready to use. After use, insert the knob, but don’t push it in. The lighter circuit is p rotected by a 20-ampere fuse to prevent damage should the lighter get stuck in the IN position. If this fuse needs replacement, check to ensure that the lighter is not stuck before replacing the fuse.

WARNING! Do not exceed the voltage/amperage capacity of the cigarette lighter. It could result in a ﬁre. Follow all warnings and instructions in the operator’s manual for the appliance you are using.

The lighter receptacle may be used to power auxiliary equipment that does not draw more than 20 amperes maximum.

Gauges And Displays

On the pages that follow you will ﬁnd descriptions of some of the gauges on your instrument panel. For more information about using them in driving, see " & OPERATING THE VEHICLE". Also check the Index under the name of the gauge or function you want to know more about.

WARNING! Do not ignore a warning light or buzzer. These signals tell you something is wrong with your vehicle. It could be a failure in an important system, such as the brakes, which couldleadtoanaccident. Havetheappropriate system checked immediately.

PART 7: STARTING

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PART 4: CONTROLS AND DISPLAYS Speedometer-Message Center (SMC)

Speedometer-Message Center (SMC)

NOTE: All of the warning lights and alarms for functions monitored by the multiplex instrumentation system are contained within the individual gauges of the system. The alarms for other controls or systems that you may have will be displayed separately on the instrument panel. They are described further in " THE VEHICLE" of this manual.

PART 7: STARTING & OPERATING

112 43

The speedometer-message center (SMC) is a combination of a speedometer and a message center. The speedometer indicates your vehicle’s speed in both miles and kilometers per hour. The message center contains a 7- character, segmented LCD scree n that can display the following items:

•Odometer

• Trip1odometer

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Speedometer-Message Center (SMC) PART 4: CONTROLS AND DISPLAYS

• Trip2odometer

• Hourmeter

•Clock

• Clock alarm

• Warning and Diagnostic messages (see " strumentation Syst e m Alarm Summary")

A Select/Reset switch on the right side of the dash controls the display.

The odometer is normally displayed on the screen. To choose another function, press and release the Select switch until it appears.

• The odometer reads m iles & tenths; e.g., 123456.7

• The Trip 1 odometer reads miles & tenths; e.g.,

1234.5T1

• The Trip 2 odometer reads miles & tenths; e.g.,

1234.5T2

• The hourmeter reads in hours; e.g., 12345HR

• The clock reads in hours & minutes, with A.M. or P.M. indicated at the end; e.g., _ _ 12:34A (or P).

• If the clock alarm is set and activated, the display will appear as * _ 12:34A (or P).

• The clock alarm reads in hours & minutes, with A.M. or P.M. indicated as shown; e.g., AL12:34A (or P).

Multiplex In-

To set or reset a function, follow the procedures below.

NOTE: Neither the odometer nor the hourmeter can be reset.

1.TurntheignitionswitchtoON.

2. Choose the desired function.

3. Set or reset the f unction:

• Trip Odometers: Press and hold the Reset switch until the mileage is reset to zero; this will take about 3 seconds.

•Clock

Press & release the Reset switch; the hours digit will ﬂash. A. Press & hold the Select switch; the hours digits

will increase until the switch is released. Scroll through 12 hours to change between A.M. and P. M .

B. Press & release the Reset switch; the hours dig-

its will stop ﬂashing, and the minutes digits will begin to ﬂash.

C. Press & hold the Select switch; the minutes digits

will increase until the switch is released.

D. Press & release the Reset switch; the minutes

digits will stop ﬂashing. The clock is now set.

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PART 4: CONTROLS AND DISPLAYS Speedometer-Message Center (SMC)

•ClockAlarm

A. Press & release the Reset switch; the hours digit

will ﬂash.

B. Press & hold the Select switch; the hours digits

will increase until the switch is relea se d. Scroll through 12 hours to change between A.M. and P. M .

C. Press & re lea se the Reset switch; the hours dig-

its will stop ﬂashing, and the minutes digits will begin to ﬂash.

D. Press & hold the Select switch; the minutes digits

will increase until the switch is released.

E. Press & release the Reset switch; the m inutes

digits will stop ﬂashin g. The alarm is now s et and activated (the “*” symbol will show in the clock display to indicate this).

– To t urn the alarm OFF or ON, p res s & hold the

Select sw itch for 3 seconds while v iewing any display.

– To deactivate the buzzer when the alarm

sounds, press & release the Select switch. (Note: The alarm will automatically deactivate after 60 seconds.)

NOTE: When the ignition is OFF, the SMC will be in a “sleep” (blank) mode. To “awaken” it, press the “Select” switch. The SMC will function normally while awake; it will return to a “sleep” mode 20 seconds after a switch is last pressed.

Further use and operation of the S MC is covered in " 7: STARTING & OPERATING THE VEHICLE" of this manual.

PART

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Air Application Gauge PART 4: CONTROLS AND DISPLAYS

Tachometer

11244B

Your tachometer measures the engine speed in revolutions- per-minute (RPM). Watching your tachometer is important to driving efﬁciently. It will let you match driving speed and gear selection to the operating range of your engine. If your engine speed gets too high, you can select a higher gear to lower the RPM. If your engine speed drops too low, you can select a lower gear to raise the RPM.

Air Application Gauge

114 58

This gauge will show you how much air pressure is being applied from your foot brake valve or trailer brake hand valve.

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PART 4: CONTROLS AND DISPLAYS Primary And Secondary Air Pressure Gauges (Air Reservoir)

Primary And Secondary Air Pressure Gauges (Air Reservoir)

These air pressure gauges indicate the amount of air pressure in the brake system in pounds per square inch (psi).

The primary gauge shows the front reservoir air pressure:

114 65

The secondary gauge indicates pressure in the rear reservoir:

114 64

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Engine Oil Pressure Gauge PART 4: CONTROLS AND DISPLAYS

WARNING! The air pressure warning light and the audible alarm indicate a dangerous situation. There is not enough air pressure in the reservoirs for repeated braking and the brake system has failed. If air pressure falls below 60 psi (414 kPa) the spring brakes could suddenly apply, causing a w heel lockup, loss of control, or your vehicle to be overtaken by following vehicles. You could be in an accident and severely injured. Ifthesealarmscomeonwhileyouare driving, bring your vehicle to a safe stop right away. If the light and alarm do not turn off at start-up, do not try to drive the vehicle until the problem is found and ﬁxed.

Engine Oil Pressure Gauge

11241A

It is important to maintain oil pressure within acceptable limits. Your engine manual will give normal operating pressures for your engine.

CAUTION: Continuing to operate your vehicle with insufﬁcient oil pressure will cause serious engine damage.

– 48 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Water Temperature Gauge

• If your oil pressure fails to rise within 10 seconds after your engine starts, stop the engine and determine the cause.

• If your oil pressure suddenly drops while you are driving,bringthevehicletoastopassoonaspossibleina safe locat i on off the road an d turn off the engine. Wait a few minutes to allow oil to drain into the oil pan, and then check the oil level. Add oil if necessary. If the problem persists, contact an authorized service center.

Check the engine manufacturer’s manual for the correct oil pressure ranges for your engine.

Water Temperature Gauge

11242A

The water temperature gauge shows the temperature of the engine coolant. Under normal operating conditions the water temperature gauge should register between 165° 205° F (74° and 90° C), depending on the engine. Under certain conditions, somewhat higher temperatures may be acceptable. But the maximum allowable temperature is 225° F (107° C) with the cooling system pressurized, ex-

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Water Temperature Gauge PART 4: CONTROLS AND DISPLAYS

cept for certain special engines. Check your engine manual to be sure.

Engine Overheating

WARNING! Do not remove the radiator ﬁll cap while the engine is hot. Scalding steam and ﬂuid under pressure may escape and cause serious personal injuries. You could be badly burned.

• Wait until the coolant temperature is below 122°F (50°C).

• Protect face, hands, and arms by covering the cap with a large, thick rag to protect against escaping ﬂuid and steam.

• Carefully and slowly turn the cap one-quarter of a turn or until it reaches the ﬁrst stop— allowing excess pressure to escape—push down and turn for ﬁnal removal.

Wait until the coolant temperature is below 122° F (50° C). Protect your face, hands, and arms by covering the cap with a large, thick rag to protect you against escaping ﬂuid

and steam. Before you completely remove the cap, carefully and slowly turn the cap part way to allow excess pressure to escape. Then push down and turn for ﬁna l r emoval.

The cooling system may overheat if the coolant level is below normal or if there is a sudden loss of coolant (such as a worn hose splitting). It may also temporarily overheat during severe operating conditions such as climbing a long hill on a hot day or stopping after high-speed driving.

If the “Engine Coolant Temperature” warning light comes on, or you have any other reason to suspect the engine may be overheating:

• Stop the vehicle, but DON’T TURN OFF THE ENGINE unless a low water warning device indicates a loss of coolant.

• With the transmission in neutral, check to be certain the oil pressure gauge reads normal. Increase the engine speed to about 1100 - 1200 R PM, maximum. Return the idle speed to normal after 2 or 3 minutes. If the warning light doesn’t go off or the temperature gauge doesn’t begin to drop, then turn the engine off.

• If the overheating came from severe operating conditions, the temperature should have cooled by this

– 50 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Fuel Gauge

time. If it has not, stop the engine and let it cool before checking to see if the coolant is low.

Fuel Gauge

114 35

WARNING! Do not remove a fuel tank cap near an open ﬂame. Hot fuel vapors are combustible and can cause an explosion or ﬁre resulting in injury or death.

The fuel gauge shows the approximate amount of fuel in the fuel tanks. You will want to keep your fuel tanks at least half full to reduce condensation of moisture in the tanks. This moisture can damage your engine.

WARNING! Carrying additional fuel containers in your vehicle is dangerous. Full or empty, they may leak, explode, and cause or feed a ﬁre. Don’t carry extra fuel containers - even empty ones.

R(08/07) Y53-6015 – 51 –

Front Drive Axle or Rear Drive Axle Temperature Gauge PART 4: CONTROLS AND DISPLAYS

Transmission Temperatu re Gauge

114 27

Your Transmission Temperature Gauge indicates the temperature of the oil in your transmission. Watch this gauge to know when your transmission is overheating. If it is, have it checked by an authorized service representative. Maximum transmission temperature may vary, depending upon

the transmission and type of lubricant. It is typically 250° F (121° C); check your transmission’s owner’s manual.

Front Drive Axle or Rear Drive Axle Temperature Gauge

114 25

– 52 – Y53-6015 R(08/07)

PART 4: CONTROLS AND DISPLAYS Manifold Pressure Gauge

CAUTION: Driving with very hot temperatures in your rear drive axles can cause serious damage to axle bearings and seals. Check axle lubrication if a driver temperature alarm sounds.

These gauges indicate the temperature of the lubricant in your vehicle’s axle(s). These temperatures will vary with thekindofloadyouarecarryingandthedrivingconditions you encounter. Maximum axle temperature may vary, depending upon the axle and type of lubricant. Very high temperatures signal a need to have your axle(s)’ lubrication checked.

Manifold Pressure Gauge

11453-1

Your manifold pressure gauge indicates the power your engine is putting out by showing the amount of turbo boost. If the pressure indicated by your manifold pressure gauge goes down, there may be something wrong with your engine. Have it checked by a qualiﬁed service person.

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Air Filter Restriction Indicator Gauge PART 4: CONTROLS AND DISPLAYS

Voltmeter

114 97

Your voltmeter displays the battery voltage. Normally, it should show 12V to 14V (volts).

NOTE: Even with a healthy charge/start system, the voltmeter may fall well below 12V during engine cranking. If voltage drops below 12V and stays there, have the electrical system checked.

Air Filter Restriction Indicator Gauge

114 95

This gauge indicates the condition of the engine air cleaner and is measured by inches of water (H2O). A clean ﬁlter should register 7” H2O (may vary with system design); a ﬁlter whose life is over will register approximately 20” H2O (for Cummins engines) or 25” H2O (for Caterpillar engines).

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PART 4: CONTROLS AND DISPLAYS Shift Pattern Display

CAUTION: Continued operation with the Air Filter Restriction Gauge reading 25” H2O may cause damage to the engine. Inspect the ﬁlter and replace if necessary. Holes in the paper element render an air cleaner useless and may cause the Air Filter Restriction Gauge to give a false reading, even if the element is clogged. Replace the element if it is damaged.

Warning Light Bar

WARNING! Ignoring a warning light could lead to an accident. These signals tell you something is wrong with your vehicle. It could be a failure in an important system, such as the brakes. Never ignore a warning signal. Have the appropriate system checked right away.

The warning lights and buzzer may indicate something is wrong with one of the vital systems on your vehicle. Check the lights frequently, and respond properly as soon as you see one go on (see " could save you from a serious accident.

R(08/07) Y53-6015 – 55 –

ABS Warning Lamp s"). These lights

When you turn on your ignition, the warning light bar icons will turn on for 3 - 5 seconds, as a test to let you know they are working.

Shift Pattern Display

The correct shift pattern for your vehicle appears on your control panel or windshield o r on a medallion in the shift knob. It is important that you know more about your transmission than just the shift pattern. Please read the manufacturer’s manual that is included with your vehicle.

07802

Mirrors PART 4: CONTROLS AND DISPLAYS

Mirrors

WARNING! Optional convex outside rear-view mirrors make objects appear smaller and farther away than they really are. You could have an accident if you were too close to another vehicle or other object. Keep plenty of space between your vehicle and others when you turn or change lanes. Remember that other objects are closer than they seem.

Your vehicle is equipped with outside mirrors to enable you to see to the sides and behind your vehicle. Be sure they are adjusted properly before you drive off. You will have the best ﬁeld of view to the side if you adjust each mirror so you can just see the side of your vehicle in the inboard part of the mirror.

– 56 – Y53-6015 R(08/07)

PART 5: SEAT AND RESTRAINT SYSTEMS Seat Belts And Their Proper Use

PART 5: SEAT AND RESTRAINT SYSTEMS

Seat

For information on the features and adjustment of the seat, see the seat manufacturer’s literature included with the vehicle.

WARNING!

• Do not drive or ride wit h your seat back in the reclined position. You could be injured by sliding under the seat belts in a collision.

• Do not adjust the driver’s seat while the vehicle is moving. The seat could move suddenly and unexpectedly and can cause you to lose control of the vehicle. Make all adjustments to the seat while the vehicle is stopped. After adjusting the seat and before driving off, ensure that the seat is ﬁrmly latched in position.

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Seat Belts And Their Proper Use

Seat (or safety) belts have proven to be the single most effective means available for reducing the risk of serious injury and death in motor vehicle accidents. It’s not just an opinion -- it’s a fact: Seat belts save lives.

WARNING! Do not drive vehicle without your seat belt and your riders’ belt fastened. Riding without a safety belt properly fastened can lead to increased injury or death in an emergency. Unbelted riders could be thrown into the windshield or other parts of the cab or could be thrown out of the cab. They could strike another person. Injuries can be much worse when riders are unbelted. Always fasten your seat belt.

Lap/Shoulder Belt PART 5: SEAT AND RESTRAINT SYSTEMS

1. Grasp the belt tongue and pull the belt in a continuous slow motion across your chest and lap.

2. Insert the belt tongue into the buckle on the inboard side of the seat.

3. Push down until the tongue locks securely (with an audible click). Pull on the belt to check for proper fastening.

02998

Person In Crash, Unbelted

• Pull the shoulder section to make sure the belt ﬁts

snugly across the chest.

• The shoulder belt must be positioned over the

Lap/Shoulder Belt

shoulder— it must never rest against the neck.

• Belts should ﬁt snugly across the pelvis and chest.

The combination lap-shoulder belt is equipped with a lock-

Make sure any slack is wound up on the retractor.

ing mechanism. The system adjusts automatically to a person’s size and movements as long as the pull on the belt

To unfasten the belt:

is slow. Hard braking or a collision locks the belt. The belt will also lock when driving up or down a steep hill or in a sharp curve. To fasten the belt,

1. Push in the release button on the buckle. The belt will spring out of the buckle.

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PART 5: SEAT AND RESTRAINT SYSTE MS Proper Safety Belt Adjustment

Proper Safety Belt Adjustment

Your combination lap-shoulder belt may need adjustment. Adjust safety belts properly.

• The lap belt should be worn as low and tight on the hips as possible. Make sure any slack is taken up by the belt mechanism.

• The shoulder belt should ﬁt snugly across your body.

01888

Unfastening a belt

2. To release a locked belt, lean back to take the body pressure off of the belt.

3. To store a lap-shoulder belt, allow the belt to wind up on the retractor by guiding the belt tongue until the belt comestoastop.

It should be positioned midway over the shoulder (nearer to the door); it should never res t against your neck. It you put the belt under your arm, it can’t protect you properly.

• Be sure, also, that your belt is not too loose. A loose belt could allow you to slide under it in an accident, and that could bring the belt up around your abdomen.

• Do not twist the belt in the process of pu tting it on. A twisted belt will not work as well to protect you.

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Proper Safety Belt Adjustment PART 5: SEAT AND RESTRAINT SYSTEMS

belts

Safety Restraint Belts

WARNING!

• Always wear your seat belt low over your pelvic bones.

• You can be seriously injured if your belt is buckled too high. In a crash, it would apply force to your abdomen, not your pelvic

juries.

• Do not drive with your seat belt loose. A seat belt that is too loose can allow you to fall too far forward, possibly causing head and neck injuries. You could strike the wheel or the windshield. Adjust your belt so that there is no more than 1 in. (25mm) of slack.

– 60 – Y53-6015 R(08/07)

bones. This can result in serious internal in-

PART 5: SEAT AND RESTRAINT SYSTE MS Komfort-Lok® Feature

• Do not wear the shoulder belt under your arm or otherwise out of position. In a crash your body would move too far forward, increasing the chance of head and neck injury. Also, thebeltwouldapplytoomuchforcetothe ribs, which are not as strong as your shoulder bones, and could cause you to suffer internal injuries. Wear the shoulder belt over your shoulder.

• Do not twist the belt in the process of putting it on. A twisted belt will not work as well to protect you. In a crash, the full width of the belt would not be protecting you. A twisted belt could cut into your body and cause serious injuries. Straighten the belt before buckling it. If you are unable to wear it without twisting it, have your dealer or service person repair it as soon as possible.

Komfort-Lok® Feature

Your Peterbilt contains a feature designed to eliminate cinching and provide improved safety and comfort. Cinching is the condition where a belt becomes continually tighter around you during a rough, bouncy ride. The need for this feature increases with rough road conditions, particularly over long distances.

To eliminate cinching simply activate the Komfort-Lok feature at the appropriate time:

1. Fasten your seat belt according to the directions.

2. You are now ready to activate the Komfort-Lok. Lean forward to pull a little slack (maximum of one inch, measured from the belt to your chest) in the belt. Be sure to allow only a small amount of slack (see the Warningonaloosebelt).

3. When the slack is right, ﬂip the latch cover up, cinching it into place. This lock s the Komfort-Lok.

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Pregnant Women PART 5: SEAT AND RESTRAINT SYSTEMS

properly - low over her pelvis, below her abdomen - the belt won’t harm the baby, even in a crash. And remember

- the best way to keep an unborn baby safe is to keep the mother safe.

02395

4. To release the Komfort-Lok latch, reach up and pull the latch cover open (down), or simply pull down on the shoulder belt.

5. When you want to get out of the cab, release the latch, then just push the button on the buckle.

Pregnant Women

Sometimes pregnant women w orry that in a crash the seat

Pregnant Woman With Belt Properly Worn

PREGNT

belt could hurt the baby. But if a woman wears her belt

– 62 – Y53-6015 R(08/07)

PART 5: SEAT AND RESTRAINT SYSTE MS Tether Belts

Passengers

Anyone riding in your vehicle should wear a seat belt. The responsible operator sees to it that everyone in the vehicle rides safely - and that means with a seat belt.

Some Other Safety Restraint Tips:

• Don’t wear belts over rigid or breakable objects in or on your clothing. Such things might be eyeglasses, pens, keys, etc. T hese could cause injury in an accident.

• Damaged belts in the cab must be replaced. Belts that have been stretched, cut, or worn out may not protect youinanaccident.

• Avoid catching belts in the doors or seat hardware. They could be damaged.

• Don’t modify or disassemble the seat belts in your vehicle. They won’t be available to keep you and your passengers safe.

• Never bleach or dye seat belts; chemicals can weaken them. Do, however, keep them clean by following the

care label on the belts. Let them dry completely before allowing them to retract.

• If any seat belt is not working properly, see an authorized Peterbilt dealer for repair or replacement.

Tethe r Belts

Tether belts are installed on suspension seats. They help secure the seat to the ﬂoor to restrain it in case of a sudden stop or an accident.

WARNING! Do not remove, modify, or replace the tether belt system with a different tether system. A failed or missing tether belt could allow a seat base to fully extend in the event of an accident leading to greater injuries or death.

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Tether Belts PART 5: SEAT AND RESTRAINT SYSTEMS

Tether Adjustment

WARNING!

• Failure to adjust tether belts properly can cause excessive movement of the seat in an accident. This could lead to greater injuries for you. Tether belts should be adjusted so that they are taut when the seat is in its most upward and forward position.

• Before driving or riding in a vehicle, ensure that there is adequate head clearance at maximum upward travel of seat. Serious injury may occur if head clearance is not adequate. Shorten the tether belt as necessary to provide adequate head clearance.

sk28514_Page_1

Illustration of a Tether

• Make sure the tether belt is attached to the cab deck and seat frame. It should be routed through the buckle on each side.

• To lengthen the tether, turn the buckle to a right angle to the webbing. Then pull the buckle. To shorten the tether, pull on the strap.

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PART 5: SEAT AND RESTRAINT SYSTEMS Inspection of the Restraint System

Inspection of the Restraint System

WARNING! Failure to properly inspect and maintain restraint systems can lead to serious injury or loss of life. Without periodic inspection and maintenance to detect unsafe conditions, seat restraint components can wear out or not protect you in an accident.

The typical three-point seat systems in passenger cars may seem very similar to the three-point seat belt system in heavy duty vehicles, but there are some key differences that all users of this system should be aware of:

• In typical passenger vehicle automotive seat belt applications, the normal life of the vehicles is usually 8 to 10 years and the total mileage frequently does not exceed 125,000 miles (200,000 km). Heavy duty vehicles often see this type of mileage in a very short period of time, and accumulation of mile age in excess of 500,000 miles (800,000 km) during the vehicle lifetime is not unusual.

•Asigniﬁcant difference in the two systems is the amount of movement of webbing in the system. In an automotive application, there is little movement of the seat belt system, except when the user puts on or

takes off the belt. In trucks, however, there is almost constant movement of the belt through hardware due to ride characteristics and seats which are designed to move, in order to enhance driver comfort. There can even be movement of the webbing in the seat belt system when the belt in not being used. Relative movement between the seat and the cab, which normally occurs whenever the truck is in operation, can cause wear of the seat belt webbing.

• Environmental conditions represent another major difference in the systems in automobiles and heavy duty and specialty vehicles. Unlike the automotive environment, heavy duty and specialty vehicles may be very dirty, and have more exposure to the sun’s damaging ultraviolet rays, thus resulting in a reduction of the life of the seat belt system.

The high mileage associated with heavy duty vehicles and possible wear of the 3-point seat belt system, the continual relative movement of the system, the possible contact with the vehicle seat or other parts of the cab structure, and the potential exposure of this system to severe environmental conditions make it crucial to inspect the three-point seat belt systems regularly. It is recommended that the seat belt system in a vehicle be inspected every 20,000 miles (32,000 km) or more often if the vehicle is exposed to severe environmental conditions. Any seat belt system that

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Inspection of the Restraint System PART 5: SEAT AND RESTRAINT SYSTEMS

shows cuts, fraying, extreme or unusual wear, signiﬁcant discoloration due to UV exposure, abrasion to the seat belt webbing, or damage to the buckle, latch plate, retractor hardware or any other obvious problem should be replaced immediately, regardless of mileage.

WARNING! It is important to remember th at any time a vehicle is involved in an accident, the entire seat belt system must be replaced. Unexposed damage caused by the stress of an accident could prevent the system from functioning properly the next time it is needed, which could result in severe injury or even death.

One of the most critical areas to be inspected is the seat belt webbing. Constant movement of the belt actually means the webbing is experiencing wear as it travels in and out of the retractor, through the pillar loop web guide and through the various pieces of hardware associated with the belt. The following guidelines detail how to inspect for cuts, fraying, extreme or unusual wear of the webbing, etc. and damage to the buckle, retractor, hardware, or other factors which indicate that belt replacement is necessary.

1. Check the web wear in the system. The webbing must be closely examined to determine if it is coming into contact with any sharp or rough surfaces on the seat or other parts of the cab interior. These areas are typical places where the web will experience cutting or abrasion. Cuts, fraying, or excessive wear would indicate the need for replacement of the seat belt system.

03004A

2. The D-loop web guide is the area where almost constant movement of the seat belt webbing occurs be-

– 66 – Y53-6015 R(08/07)

PART 5: SEAT AND RESTRAINT SYSTEMS Inspection of the Restraint System

cause of relative movement between the seat and the cab.

3. Check the Komfort Latch™ for cracks or possible damage and that it works properly.

4. Check the buckle and latch for proper operation and to determine if the latch plate is worn, deformed, or damaged.

5. Inspect the retractor w eb storage device, that is mounted on the ﬂoo r or B-pillar of the vehicle for damage. The retractor is the hear t of the occupant restraint system and can often be damaged if abused, even unintentionally. Check retractor web storage device operation to ensure that it is not locked up and that it spools out and retracts webbing properly.

WARNING! Failure to adjust tether belts properly can cause excessive movement of the seat in an accident. This could lead to greater injuries for you. Tether belts should be adjusted so that they are taut when the seat is in its most upward and forward position.

6. If adjustable tethers are being used, be sure they are adjusted in accordance with installation instructions. Tethers must also be inspected for web wear, just as with the seat belt systems.

7. Mounting hardware should be evaluated for corrosion, and for tightness of bolts and nuts.

8. Check web in areas exposed to ultraviolet rays from the sun. If the color of the web in these areas is gray to light brown, the physical strength of this web may have deteriorated due to exposure to the sun’s ultraviolet rays; replace the system.

WARNING! Replace the entire belt system (retractor and buckle side) if replacement of any one part is necessary. Unexposed damage to one or more components could prevent the system from functioning properly the next time it is needed, which could result in severe injury or even death.

If the inspection indicates that any part of the seat belt system requires replacement, the entire system must be replaced, both retractor and buckle side. An installation guide is attached to every replacement belt. This set of instructions is entitled “THREE-POINT SEAT BELT INSTAL- LATION GUIDE.” There are separate seat belt instruction guides for suspension and ﬁxed bench seats. Use the proper guide for your type of seat, and follow the instructions very closely. It is vitally important that all components must be remounted back in the same position as the origi-

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Inspection of the Restraint System PART 5: SEAT AND RESTRAINT SYSTEMS

nal components that were removed. This will maintain the design integrity of the mounting points for the seat belt assembly.

Once the need for replacement of the seat belt has been determined, be certain that it is only replaced with the recommended replacement seat belt. The occupant restraint

system has been developed and tested speciﬁcally for this vehicle. If the vehicle was originally equipped with a lap belt, it cannot be replaced with a three-point shoulder harness system, because the cab mounting points are not structurally designed for a three-point seat belt.

– 68 – Y53-6015 R(08/07)

PART 6: DRIVER’S CHECKLIST Safe Vehicle Operation

PART 6: DRIVER’S CHECKLIST

Safe Vehicle Operation

To keep your vehicle in top shape, and to maintain its high level of safety for you, your passengers, and your load, make a thorough inspection every day before you drive. You’ll save maintenance time later -- and the safety checks could help prevent a serious accident. Please remember, too, that Federal law requires a pre-trip inspection and so do commercial trucking companies.

For more information, you can refer to Federal Motor Carrier Safety Regulation 392.7 which tells you that interstate commercial motor vehicles are not to be driven unless the driver is sure that certain parts and accessories are in working order.

You aren’t expected to become a professional mechanic. The purpose of your inspections is to ﬁnd anything that might interfere with the safe and efﬁcient transportation of yourself and your load. If you do ﬁnd something wrong and

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can’t ﬁx it y ourself, please have a qualiﬁed mechanic ﬁxit right away.

For your safety, as well as those around you, be a responsible driver:

• If you drink, do not drive.

• Do not drive if you are tired, ill, or under emotional stress.

Much has gone into the ma nufacturing of your Peterbilt, including advanced engineering techniques, rigid quality control, and demanding inspections. These manufacturing processes will be enhanced by you—the safe driver— who observes the following:

• knows & understands how to operate a vehicle and all its controls

• maintains the vehicle properly

• uses driving skills wisely

Checking Under the Hood or Cab PART 6: DRIVER’S CHECKLIST

WARNING! Do n ot drink and drive. Your reﬂexes, perceptions, and judgment can be affected by even a small amount of alcohol. You could have a serious—or even fatal accident—if you drive after drinking. Please do not drink and drive or ride with a driver who has been drinking. The use of alcohol, drugs, and certain medications will seriously impair perception, reactions, and driving ability. These circumstances can substantially increase the risk of an accident and personal injury.

The daily checks listed below are the foundation of your overall preventive maintenance program. See " MAINTENANC E AND SERVICE" for the complete preventive maintenance schedule for your vehicle.

PART 8:

Approaching the Vehicle

1. Check the overall appearance and condition. Are windows, mirrors, and lights clean and unobstructed?

2. Check beneath the vehicle. Are there signs of fuel, oil, or water leaks?

3. Check for damaged, loose, or missing parts. Are there parts showing signs of excessive wear or lack of lubrication? Have a qualiﬁed mechanic examine any questionable items and repair them without delay.

Checking Under the Hood or Cab

With the engine stopped:

1. Check the engine oil level; top off as necessary. Refer to your engine’s operating m anual for the type of oil to use.

2. Chec k the engine coolant level. Top off as necessary with premixed coolant. Refer to the instructions on "

Topping Off" for adding coolant to the proper level.

3. Check the condition of the engine belt(s).

4. Check brake lines and hoses.

5. Chec k all other accessories, controls, belts, hoses, and wiring for condition and adjustment.

6. Check the windshield washer ﬂuid level; top off as necessary.

7. Chec k the power steering ﬂuid reservoir; top off as necessary.

– 70 – Y53-6015 R(08/07)

PART 6: DRIVER’S CHECKLIST Checking Outside the Vehicle

8. Check the steering components (pitman arm; draglink; power steering hoses, etc.)

9. Drain the fuel/water separator.

Checking Outside the Vehicle

WARNING!

• Diesel fuel in the presence of an ignition source (such as a cigarette) could cause an explosion. You could be seriously injured. A mixture of gasoline or alcohol with diesel fuel increases this risk of explosion. Use only the fuel recommended for your engine.

• Hot fuel vapors are combustible and can cause an explosion or ﬁre resulting in injury or death. Do not remove a fuel tank cap near an open ﬂame.

1. Be sure all wheel studs and cap nuts are secure. Check wheel cap nut torque weekly; refer to the instructions on "

2. Check tires for condition and proper inﬂation.

Wheel Nuts".

3. Check the front wheel bearing lube level.

4. Check parking (spring) brakes as to the condition and tightness of air lines, breathers, clamp rings & bolts, mounting studs, and release bolts.

5. Check turn signal operation.

6. Check emergency ﬂashers and exterior lamps.

7. Check the fuel tanks. Is there enough fuel? Are the tank caps secure?

8. Visually inspect the fuel tank mounting hardware. Are the tank straps tight? Is the webbing in place?

9. If equipped with fuel tank steps: are they damaged or broken? Is the grommet/windlace in place between the tank and side plate? Are bolts missing or loose?

10.Check the air cleaner and mufﬂer(s). Are they tight and secure?

11.Check the trailer connections. Are they secure and the lines clear? If they are not being used, are they stored properly?

12.Is the trailer spare wheel secure? Inﬂated?

13.Is the landing gear up and the handle secured?

14.Check the 5th wheel. Is the kingpin locked?

15.Is the sliding 5th wheel locked?

16.Check for loose or missing suspension fasteners.

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After Engine Warmup PART 6: DRIVER’S CHECKLIST

17.Check springs or other suspension parts for damage such as cracks, gouges, distortions, bulges, or chafing.

18.Check the air system. Are there leaks?

19.Drain excess moisture from all air supply tanks. Make sure the drain valves are closed. This procedure is also required for air supply tanks equipped with automatic drain valves.

20.Check that cab latch or hood hold-downs are hooked.

In - Cab Checklist

CAUTION: To avoid injury while entering or leaving the cab, keep your feet in contact with the steps and your hands on the handhold. Always have three points of contact as you enter or exit a cab. See " ACCESS" of this manual for more information.

1. Adjust the seats.

2. Fasten and adjust safety restraint belts. (See " 5: SEAT AND RESTRAINT SYSTEMS" or the Index, under Restraint Systems.)

PART 2: CAB AND FRAME

PART

3. Safety Restraints: Check and inspect condition. (See "

PART 5: SEAT AND RESTRAINT SYSTEMS" or the

Index, under Restraint Systems.)

4. Check mirror adjustment.

5. Operate air-powered devices to circulate lubricants.

After Engine Warmup

1. Check automatic transmission oil (if equipped).

NOTE: The above items should be checked daily, as a minimum. They are in addition to, not in place of Federal Motor Carrier Safety Regulations. These may be purchased by writing to:

Superintendent of Documents U.S. Government Printing Ofﬁce Washington, DC 20402

– 72 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE Normal Temperature Starting Procedure

PART 7: STARTING & OPERATING THE VEHICLE

Since each vehicle is custom-equipped, all engine operation instructions in this manual are general. You will want to consult the manual for your engine to ﬁnd out details about your speciﬁc engine’s needs. You may need to use a slightly different procedure from the one outlined here.

Also check the ATA Truck Driver’s Handbook provided with your vehicle. It will give you tips on starting, shifting, and driving a truck.

Below are ins truction s for both normal-temperature starting and cold-weather starting.

NOTE: If the instrument panel displays other messages or if other alarms activate after the key is turned ON, see the Instruments and Controls section to understand what you should do.

CAUTION: Never operate the starter motor while the engine is running. The starter and ﬂywheel gears could clash or jam, severely damaging them.

Normal Temperature Starting Procedure

When the outside temperature is above 50° F (10° C), you can use the following procedure.

1. Set the parking brake.

2. Put your main transmission in Neutral.

3. Disengage (depress) the clutch (with manual transmission).

4. Turn the key switch to ON. The vehicle’s system will conduct a test of all gauges and warning lights.

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5. Turn the ignition key to the START position. If the

NOTE: Some starters are equipped with overcrank protection. Check t he “Engine Operation and Maintenance Manual” for details.

engine does not start within 30 seconds, release the starter button. To avoid overtaxing the starter motor or the batteries, don’t use the starter for more than 30 seconds. Let the starter motor cool and the batteries recover for two minutes before trying again.

Engine Warmup PART 7: STARTING & OPERATING THE VEHICLE

If the engine still won’t start after a couple of tr ies, check the manual override shutdown valve and fuel lines for possible fuel starvation or air leaks. Starting failure may mean fuel isn’t reaching the injectors.

6. As soon as the engine starts, begin to watch the oil pressure gauge. Check your engine manufacturer’s manual for the right pressure for your engine. If the oil pressure doesn’t rise within a few seconds, stop the engine. Find out what is wrong before restarting the engine.

Your vehicle’s multiplex instrument system may be equipped with an engine shutdown feature. If certain unacceptable conditions develop after start-up, this feature will automatically shut down the engine within 30 seconds. If this occurs, refer to the multiplex instrument system operations & service manual for more information.

7. Slowly engage (release) the clutch after the engine has started.

8. Wait until normal engine oil pressure registers on the gauge before idling or accelerating the engine beyond 1000 RPM.

Cold Temperature Starting Procedure

In cold weather, fast engine starting helps relieve the loads on the electrical system and cranking motor. Using the special cold starting equipment will help starting. If you follow a few simple guidelines, you will extend the service life of your engine.

• Keep the electrical system in top condition.

• Use the best quality fuel of the recommended grade.

• Use recommended engine lubricating oil.

Engine Warmup

The purpose of engine warmup is to allow oil ﬁlm to be established between pistons and liners, shafts and bearings while your engine gradually reaches operating temperature.

Warmup Procedure

1. After you’ve started your engine, idle it at approximately 600 RPM while you check

• oil pressure

• air pressure

• alternator output

– 74 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE Engine Warmup

2. After a few minutes of idling at 600 RPM, increase your idle speed to 900 or 1000 RPM. Continue your warmup. T his procedure allows oil to warm and ﬂow freely while pistons, liners, shafts, and bearings expand slowly and evenly. In extremely c old temperatures, you may have to increase idle speed.

NOTE: In colder clim ates where the temperature is often below freezing, the warmup for turbocharged engines is espec ially important. Chilled external oil lines le ad ing to the turbocharger will slow the oil ﬂow until the oil warms, reducing oil available for the bearings. Watch the engine oil temperature or pressure gauge for a warming trend before increasing engine idle speed (RPM).

3. Continue the engine warmup until the coolant temperature reaches at least 130° F (54° C). At this temperature, you can use partial throttle. Wait until the coolant temperature is at least 160° F (71° C) before operating at full throttle.

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Transmission Warmup PART 7: STARTING & OPERATING THE VEHICLE

CAUTION: The use of a winterfront can result in excessive engine coolant, oil, and charge air (intake) temperatures, which can lead to overheating and possible engine damage. If you mustuseawinterfront

• Refer to the “Engine Operation and Maintenance Manual” for operating restrictions and recommendations.

• Keep the engine exhaust system and the vehicle’s cab ve n ti la ti on system properly maintained. It is recommended that the vehicle’s exhaust system and cab be inspected

– By a competent technician every 15,000

miles

– Whenever a change is noticed in the sound

of the exhaust system

– Whenever the exhaust system, underbody,

or cab is damaged

NOTE:

• Do not stay in the vehicle with the engine running or idling for more than 10 minutes with the

vehicle’s Heater and A/C ventilation system in RECIRC or at LOW FAN SPEED. Even with the ventilation system On, running the engine while parked or stopped for prolonged periods of time is not recommended.

• If other vehicles are parked next to you idling, move your vehicle or do not stay in your vehicle for prolonged periods of time.

Transmission Warmup

WARNING! Do not operate this vehicle if you notice a gradual or sudden increase in cable shift effort or a decrease in the usable travel. Take the vehicle to the nearest authorized Peterbilt dealer for repair. Failure to correct either of these conditions could result in serious injury or death.

CAUTION: Cables are designed to be contaminant resistant, not contaminant proof. Protect cable from contaminants, chemicals, and physical damage which may damage the control cable.

– 76 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE Idling the Engine

Idling the Engine

NOTE: Shift control cables are lubric ated for life and are non-repairable. The cables cannot be lubricated and/or repaired. If you detect a broken seal, moisture, or if the cable has frozen, the shift cable must be replaced. Do not apply heat to thaw or improve performance of the cables.

In cold weather you may ﬁnd shifting sluggish when you ﬁrst start the engine. Transmission warmup is especially

important at this time, but it is always a good idea to warm up your transmission before starting out on the road.

To warm up the transmission lubricating oil during engine warmup, with a single transmission:

• Check that the transmission is in Neutra l.

• Release the clutch pedal.

If you have a two-transmission combination:

• Put the main transmission in gear.

• Put the auxiliary transmission in Neutral. This will allow the transmission countershaft to turn, agitating the oil and warming it.

Under most circumstances, idling your engine for long periods merely wastes fuel. In severe arctic weather conditions, however, you may need longer idling to be sure all parts of your engine are fully lubricated.

WARNING! To reduce the chance of personal injury and/or vehicle damage from overheated engines, which can result in a ﬁre, never leave the engine idling without an alert driver present. If the engine should overheat, as indicated by the engine coolant temperature light, immediate action is required to correct the condition. Continued unattended operation of the engine, even for a short time, may result in serious engine damage or a ﬁre.

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Shifting Gears in a New Vehicle PART 7: STARTING & OPER ATING THE VEHICLE

CAUTION: Do not allow your engine to idle, at low rpm’s (400–600 rpm), longer than ﬁve minutes. Long periods of idling after the engine has reached operating temperatures can decrease engine temperature and cause gummed piston rings, clogged injectors, and possible engine damage from lack of lubrication. The normal torsional vibrations generated can also cause transmission wear.

During the time it takes you to drink a cup of coffee, your engine can cool as much as 60° F (33° C) below normal operating temperature. To keep the engine warm during a short break, turn it off. And don’t a llow your engine to idle longer than ﬁve minutes.

Putting The Vehicle In Motion

This section discusses the clutch and transmission operation to get your Peterbilt underway.

WARNING! Do not carry loose objects in your cab, it can be dangerous. In a sudden stop, or even going over a bump in the road, they could ﬂy through the air and strike you or a passen-

ger. You could be injured or even killed. Secure all loose objects in the cab before moving the vehicle.

Shifting The Transmission

You will ﬁnd a shift pattern either on a decal in your cab or on a medallion in the shift knob. Check to be sure you know the c orrect sequence for your particular transmission. Refer to the transmission manual included with your vehicle for complete instructions in the operation of your transmission.

Shifting Gears in a New Vehicle

Shift carefully in a new vehicle. The transmission may be a little stiff at ﬁrst. So be careful to avoid gear clashing. When you are operating a new vehicle or one that has been exposed to cold weather, you want the transmission lubricant to circulate and coat the contacting surfaces of the gears. Metal contacting metal in moving parts may seriously damage your transmission. So don’t drive in one gear for long until the transmission lubricant has had a chance to coat those contacting surfaces.

– 78 – Y53-6015 R(08/07)

PART 7: STARTING & O PERATING THE VEHICLE Operating the Clutch

Operating the Cl utch

“Riding” the Clutch

The clutch pedal is not a footrest. D riving with your foot on the clutch pedal will allow your c lutch to slip, causing excessive heat and wear. You can damage your v eh icle this way.

Clutch Travel

CAUTION: Always use ﬁrstgearoralowspeed range to start the vehicle in motion. The use of a higher gear or speed range forces undue strain on the engine, clutch, other transmission components, and may cause damage.

To put your vehicle into motion, push down on the clutch pedal until the clutch brake makes contact. This contact will occur at about 1/2 inch to 1 inch from the end of pedal stroke. Select a gear low enough to let your vehicle start forward with the throttle at idle until the clutch is fully e ngaged.

The total stroke of the clutch pedal is about 10 inches. The ﬁrst 1 3/4 to 2 inches is free travel. After that is the release stroke, the part that fully releases the clutch. The last 1/2

to 1 inch engages the clutch brake. If your vehicle is new, watch the free travel in your clutch carefully for the ﬁrst few hundred miles. As your clutch lining wears and high spots get worn smooth, you will get less free travel.

Always start out in a low gear with a ceramic-faced clutch. Starting in higher gears, even with a light load, will cause a very jumpy start and excessiv e wear.

And don’t allow your vehicle to roll in the opposite direction at all during clutch engagement. If you need to start up on an incline, apply your service brakes before you release the parking brake. Then release your service brakes as you engage the clutch and apply throttle.

Release Bearing Wear

When you must idle your engine for any period of time, shift your transmission to neutral and engage the clutch (take your foot off the pedal). This helps prevent unnecessary wear of your clutch release bearing. And it is less tiring for you, too.

Clutch Adjustment

Inspect manual and self-adjusting clutches regularly to maintain correct clutch adjustment. Have your dealer’s

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Operating the Clutch PART 7: STARTING & OPERATING THE VEHICLE

service department perform any adjustments necessary. Do not adjust your clutch by adjusting the external linkage without ﬁrst checking (and correcting if necessary) the internal clutch adjustment. Using only the external linkage adjustment could damage the clutch.

Clutch Brake

Your clutch brake is used for stopping gear rotation to let you shift into 1st gear or reverse when your vehicle is at a standstill.

About the last 1/2 to 1 inch of clutch pedal travel activates your clutch brake. So if you are stopped and want to shift directly into 1st or reverse, depress the clutch p ed al until contact with the clutch brake is made to stop transmission gear rotation.

If you have a butt-tooth condition and can’t shift the transmission, gradually release the clutch. Then the drive gear can roll enough to allow the teeth to line up properly and complete the shift.

CAUTION: Be careful not to apply the clutch brake while the vehicle is moving. The purpose of the clutch brake is to stop the transmission so that you can shift into a starting gear with-

out grinding. Applying the clutch brake when the vehicle is moving causes a braking effect on the entire vehicle. This wear naturally shortens the service life of your clutch brake.

Double Clutching

Whether you are upshifting or down shifting, it is best to double clutch. Double clutching is easier on your transmission and on your engine, helping your vehicle match engine speed with driveline speed and achieving clash free shifts. To double clutch:

1. Push down the clutch pedal to disengage the clutch.

2. Move the gear shift lever to neutral.

3. Release the pedal to engage the clutch. This lets you control the RPM of the mainshaft gears. Thus you can match the RPM of the mainshaft gears to those of the output shaft.

Upshifts- Let the engine and gears slowdown to the RPM required for the next gear. Use the tachometer to determine optimum RPM for gear engagement.

Downshifts- Press accelerator to increase engine and gear speed to the RPM required in the lower gear. Use the tachometer to determine optimum RPM for gear engagement.

– 80 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE Interaxle Differential

4. Now quickly press the pedal to disengage the clutch. Move the gear shift lever to the next gear speed position.

5. Release the pedal to engage the clutch.

Interaxle Differential

On vehicles with tandem rear axles, the interaxle differential allows each axle to turn independently. Differential action between the tandems relieves stress on the rear axles and tires and provides better performance. When operating normally on paved, dry surfaces, keep your truck’s interaxle differential in the UNLOCK position.

0004

Switch In Unlock Position

In the LOCK position, continuous operation on a paved, dry surface stresses the tandem axles, possibly causing internal damage to them.

• Shift into the LOCK position to operate on slippery surfaces like

– Ice or snow - with or with o ut tire chains

– Dirt roads

– Loose sand, mud, or other off-road conditions

• Switch into LOCK when checking performance on a chassis dynamometer.

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Dual Range (Two Speed) Axles PART 7: STARTING & OPERATING THE VEHICLE

WARNING!

• Do not put the differential lock in the LOCK position while the wheels are spinning freely (slipping), you could lose control of the vehicle or cause axle damage—you could be injured. Switch to LOCK only when the wheels are not spinning.

• Do not operate the vehicle on dry pavement with the differential locked; it could lead to an injury accident. On dry pavement, you will not be able to steer well with the differential locked. Lock the differential only when operating on surfaces with poor traction, such as wet, slippery roads or loose gravel.

• Do not use the differential lock during downhill operation or at speeds above 25 mph (40 km/h). When it is engaged under these conditions, your vehicle w ill exhibit “understeer” handling characteristics. This “understeer” condition will cause your vehicle to not turn as quickly and more steering effort will be required, which can cause an injury accident.

To reduce load on the drive train, ease up on the throttle pedal whenever you shift into LOCK or UNLOCK.

Dual Range (Two Speed) Axles

If you have this option, dual range axles provide two rear axle ratios for operating under heavy loads or off-highway as well as for over the road trucking. The Low range provides maximum torque for off-road work. The High range is a faster ratio for highway speeds and conditions. A switch on your instrument panel controls this function. You will notice that it has a guard to protect you from activating it accidentally.

0005

Range Selector

– 82 – Y53-6015 R(08/07)

PART 7: STARTING & O PERATING THE VEHICLE Dual Range (Two Speed) Axles

How to use your dual range axle:

WARNING! Never shift the axle when moving downhill. Engine driveline disengagement may occur, eliminating engine retardation and allowing the wheels to spin faster than the current speed of the engine. This may require severe braking to slow the vehicle down and can result in an injury accident.

1. Unlock the interaxle differential before starting.

2. Put the Range Selector in the LOW range. Shift the transmission to start the truck moving.

3. Off-Highway: When you are driving on rough terrain and secondary roads, or under a very heavy load, keep the axle in the LOW range. Shift your transmission to maintain the road speed you want.

4. When you go from off-highway to highway driving, shift theaxletotheHIGHrangethisway:

A. Be sure the differential is UNLOCKED.

B. Keep the accelerator down and move the Range

Selector lever to HIGH.

C. Keep driving with the accelerator down until you

wanttheaxletoshift.

D. Then release the accelerator until the axle has

shifted.

E. You are now in the HIGH axle range on the high-

way. Shift the transmission normally to reach your desired cruising speed.

5. If you need to downshift the axle for more power

A. Keep the accelerator down & move the Range Se-

lector lever to LOW.

B. Keep driving with the accelerator down until you

want to downshift the axle.

C. Then release and depress the accelerator pedal

quickly to increase the engine RPM.

D. The axle will shift to the LOW range.

Important Tips on Operating Your Dual Range Axle

NOTE: If your vehicle has an automatic transmission, it may be necessary to shift it to the Neutral position momentarily to allow the main differential lock splines to fully engage or disengage.

• To avoid damaging your vehicle, shift the axle at a slower speed until you are used to driving with the dual range axle.

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Automatic and Automated Transmissions PART 7: STARTING & OPERATING THE VEHICLE

• When driving on a surface with g ood traction, keep the interaxle differential unlocked. You can drive with the axle in LOW or HIGH range.

0006

• When you are driving with poor traction, lock the differential. When you have the differential locked, drive with the axle in LOW range only.

• Always UNLOCK the interaxle differential before shifting the axle speed range.

CAUTION: If you shift the axle range with the interaxledifferentialinLOCK,youcoulddo serious damage to your axles. Never shift the axle range with the differential locked.

• Park the truck with the Range Selector in LOW.

Automatic and Automated Transmissions

An automatic or automated transmission makes shifting much easier. It remains important to completely understand how to operate the transmission to optimize its efﬁciency. Please read the manual for your automatic or automated transmission included with your vehicle.

There is no “park” position. So you will need to apply the parking brake before leaving the cab.

– 84 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE If Your Vehicle Must Be Towed

WARNING! Do not leave the cab without applying the parking brake. The truck could roll and cause an injury accident. Always apply the parking brake before you leave the cab. If your vehicle has a Freedomline™ transmission, be aware that it can roll backwards when stopped on a hill or grade, or when starting from a stop on a hill or grade. This could cause serious damage or personal injury. Observe the following guidelines:

• When stopped on a hill or grade, press the brake pedal.

• When starting from a stop on a hill or grade, quickly remove your foot from the brake pedal and ﬁrmly press on the accelerator pedal.

Auxiliary Transmission

If you have an auxiliary transmission, se e your tran smission manufacturer ’s manual for its proper operation.

If Your Vehicle Must Be Towed

Follow these directions to ensure your vehicle is not damaged when towing is required.

1. Lift driving wheels off the ground or remove the driveline and axle shafts before towing the vehicle.

CAUTION: F ailure to lift t he driving wheels off the ground or remove the driveline and axle shafts before towing the vehicle could seriously damage your vehicle. All lubricating and clutch application oil pressure is provided by an engine-driven pump, which does not work when the engine is stopped. When vehicles are towed either by wrecker or piggyback, lubricant in the top front of the drive axle will drain to the rear. This will leave the top components dry, resulting in friction that will seriously damage these components.

2. Cover open hubs when removing drive axle shafts.

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If Your Vehicle Must Be Towed PART 7: STARTING & OPERATING THE VEHICLE

CAUTION: Water, dirt and other material can enter an open hub or axle. This can contaminate the axle ﬂuid and cause possible damage to components. Ensure that the hubs are covered with plastic whenever a drive axle shaft is removed.

3. For vehicles with driver-controlled main differential lock, install the caging bolt before removing the axle shafts for towing.

A. Remove the air line and ﬁrmly cap

0007

Illustration of Driver-Controlled Main Differential

Lock

B. Remove the caging bolt from its storage hole.

C. Screw the caging bolt into the air line hole. When

fully engaged, a 0.25 - 0.5 in. (6-1/2 mm) space will remain between the air cylinder and the bolt head. This action will lock the differential by pushing a piston into a “lock” position.

– 86 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE If Your Vehicle Must Be Towed

CAUTION: Failure to install the caging bolt

when towing vehicles with driver-control main d ifferential lo ck can result in damage by failing to lock internal components in position.

WARNING! Ensure there are no open air lines

on the recovered vehicle if the recovery vehicle and recovered vehicle brake systems are connected. An open air line on the recovered vehicle will cause a leak in the air brake system of the recovery vehicle possibly causing an accident and personal injury.

CAUTION: A recovered vehicle will have no

operational brake system. Additionally, the rear axle spring brakes will probably be applied.

• If you desire to use the recovered vehicle’s brakes, ensure that the vehicles air system is connected to that of the recovery vehicle. Also ensure that any

air line that has been removed from a driver-controlled main differential lock is ﬁrmly capped to prevent loss of air pressure from the recovery vehicle.

• If you don’t desire to use the recovered vehicle’s brakes, ensure that you cage the spring brakes before attempting to move the vehicle.

4. Install recovery hitches and rigging.

CAUTION: Connect recovery rigging only to hitches intended for that purpose. Do not attach to bumpers or brackets. Connections to other structural parts could damage the vehicle.

5. Follow all state/provincial and local laws that apply to vehicles in tow.

6. Do not tow vehicles at speeds in excess of 55 mph (90 kph).

Returning a Towe d Vehicle to Service

You will have to add lubricant to prevent damage after your vehicle has been towed.

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Anti-Lock Braking System Operating Information PA RT 7: STARTING & OPERATING THE VEHICLE

1. Into the pinion cag e, a d d 1 pint (.47 liter) of lubricant, OR Into the inter-axle differential, add 2 pints (.9 4 liter) of lubricant. See the Index, under Lubricant Speciﬁcations, for the lubricant required by each axle.

2. After adding the speciﬁed type and amount of lubricant, drive the vehicle. It should be unloaded. Drive 1 to 2 miles (1.5 to 3 km) at a speed lower than 25 mph (40 km/h).

This will thoroughly circulate the lubricant through the assembly.

Anti-Lock Braking System Operating Information

This vehicle may be equipped with an anti-lock braking system (ABS). This ABS reduces the possibility of wheel lock-up. If a wheel is about to lock during braking, the ABS will aut omatically adjust air pre ssure to the brake chamb ers on the appropriate wheel(s) to prevent wheel lock-up. The ABS is automatically turned on when the ignition switch is turned on.

WARNING!

• The brake system is a critical vehicle safety system. For the safety of you and others around you, have the vehicle submitted for periodic preventive maintenance checks as well as having any suspected problems immediately checked by an Authorized Service Center. Failure to properly maintain your brake system can lead to serious injury accidents.

• Do not drive through water deep enough to wet brake components, as it may cause the brakes to work less efﬁciently than nor- mal. The vehicle’s stopping distance may be longer than expected, and the vehicle may pull to the left or right when brakes are applied, which could contribute to an accident.

– 88 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE ABS Warning Lamps

WARNING! Do not rely on an anti-lock brake system that is functioning improperly. You could lose control of the vehicle result ing in a severe accident and personal injury. If any ABS lamp goes on while you are driving or stays on after the self-check, that anti-lock system might not be working. That ABS may not function in an emergency. You will still have conventional brakes, but not anti-lock brakes. If any warning lamp indicates a problem, have that ABS checked.

ABS Warning Lamps

Truck/Tractor ABS Warning Lamp

A truck/tractor ABS wa rning lamp illumin ates when the ignition switch is ﬁrst turned on and will remain on until the system self-test has been completed successfully. Normally, this ABS lamp will remain on until a speed of no more than 9 mph has been reached and the speed sensors have been checked for correct output. The lamp should remain off after this point unless a failure in th e system is detected. The

truck/tractor ABS lamp is located in the warning lamp cluster (see "

Warning Light Bar").

ptc218aMod

CAUTION: If the truck/tractor ABS warning lamp does not illuminate when the ignition is ﬁrst turned on, there is a problem with the bulb or wiring. The driver should have this checked as soon as possible.

Trailer ABS Warning Lamp

Trucks, tractors, and trailers built on and after March 1, 2001 are equipped with power line communication (PLC) per U.S. FMVSS 121, including a trailer ABS warning lamp in the cab (see "

Warning Light Bar"):

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ABS Warning Lamps PART 7: STARTING & OPERATING THE VEHICLE

1. If no trailer is connected, or if a non-ABS-equipped trailer is connected, the trailer ABS lamp will go off after one second.

NOTE:

ptc220

• A “properly connected” ABS-equipped trailer is

CAUTION: If the trailer ABS warning lamp does not illuminate when the ignition is ﬁ rst turned on, there is a problem with the bulb or wiring. The driver should have this checked as soon as

– a trailer with PLC hooked up to the J560

connector

– a trailer without PLC that is hooked up to

an optional ISO 3731 connector

possible.

• For doubles or triples: PLC does not distinguish between trailers. An ABS problem in

NOTE: A successful warning lamp illumination and bulb check at ignition on does not indicate that a trailer has trailer ABS. You should personally inspect every trailer to determine its braking system.

A trailer ABS warning lamp will illuminate for a bulb check when the ignition switch is ﬁ rst turned on - whether or not a trailer is connected to the vehicle. If the bulb check is satisfactory, the lamp will next do either of the following:

2. If an ABS-equipped trailer is properly c onnected, the trailer ABS warning lamp will remain illuminated for a few more secon d s while the trailer ABS is tested.

• If no trailer ABS problems are detected, the lamp

will go off.

any trailer will activate the trailer ABS warning lamp.

• If a trailer ABS problem is d etected, the lamp will

remain on. The driver should have the trailer’s ABS

– 90 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE Bobtail Brake Proportioning System

problem corrected before the vehicle is driven with that trailer attached.

Wheel Spin Control Warning Lamp

Your tru ck/ tractor ABS may have an acceleration slip regulation (ASR) or automatic traction control (ATC) feature. This feature is controlled by a switch as shown in the next illustration. Either of th ese features is monitored by a warning lamp located on the switch.

0008

The Wheel Spin Control warning lamp will brieﬂy illuminate and then go out when the ignition switch is ﬁrst turned on.

The Wheel Spin Control warning lamp will illu minate whenever the ASR or ATC system detects drive wheel spin. The lamp w ill remain illuminated as long as wheel spin is detected and the ASR or ATC system is applying the drive wheel brakes or reducing engine torque. Do not allow the Wheel Spin Control lamp to remain on continuously for an extended length of time. Extended continuous use of the ASR / ATC can cause overheating of the drive wheel brakes. Engine torque or vehicle speed should be reduced to eliminate wheel spin and prevent excessive application of the ASR/ATC system. Except for checking for proper illumination of the ABS and Wheel Spin Co ntro l warning lamps when ﬁrst starting the vehicle, and for monitoring these lamps while driving, no special operating procedures are required. For detailed system description, see service literature for your speci ﬁc ABS that was provided with your vehicle.

Bobtail Brake Proportioning System

NOTE: The follo win g information is applicable only to tractor conﬁgurations built on or after March 1, 1997 and not registered in the United States.

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Overheated Brakes PART 7: STARTING & OPERATING THE VEHICLE

Peterbilt tractors without anti-lock brake syste ms (ABS) are typically equipped with a bobtail brake proportioning system. When a trailer is not connected, the drive axle brake application pressure will automatically be limited by the proportioning system. When driven in a bobtail mode, these tractors will require greater brake pedal application to provide the equivalent braking to a bobtail tractor not equipped withaproportioningsystem.

WARNING! Because of the increased use of the steer axle brakes when driving bobtail, always ensure the steer axle brakes are functioning and properly adjusted. Failure to do so can lead to decreased braking ability, longer stopping distances, loss of vehicle control, and can cause an accident.

Brake Safety and Emergency

To stop your vehicle in an emergency, vary the s ervice brake application pressure to provide maximum braking force without locking the wheels. Use engine compression to assist the service brakes; i.e., don’t depress the clutch pedal until the engine reaches idle speed.

WARNING!

• Do not operate the vehicle in the event of a malfunction in any air circuit. The vehicle should not be operated until the system is repaired and both braking circuits, including all pneumatic and mechanical components, are working properly. Loss of system air can cause the service brakes not to function resulting in the sudden application of the spring brakes causing wheel lock-up, loss of control, or overtake by following vehicles. You could be in an accident and severely injured.

• Unless you have an anti-lock braking system, always avoid completely depressing the service brake pedal, even during emergency braking. This action can cause the wheels to lock, which can lead to an uncontrolled skid and could cause an accident.

Overheated Brakes

Overheated brakes may be detected by a burning smell or smoke coming from a brake assembly. If this occurs,

– 92 – Y53-6015 R(08/07)

PART 7: STARTING & O PERATING THE VEHICLE Parking Brakes and Their Use

you should immediately stop and check for cracked brake drums, cracked brake rotors or lining ﬁres. If neither exists, resume at slow speeds to help cool the brakes. Schedule an appointment with an authorized service technician at your earliest convenience.

Parking Brakes and Their Use

The yellow diamond-shaped knob on your instrument panel controls your parking brakes. These are spring brakes which you activate by releasing air pressure from their chambers. When they are not in use, air pressure compresses the springs and releases the brakes. But putting the valve in the Park position exhausts air from the chambers and allows the springs to extend and apply the brakes. Also, if your system air drops below the safe operating level, the spring brakes will apply automatically, bringing your vehicle to a stop.

Red / Ye llo w Controls

WARNING! On trailers built before March 1975 you may not have parking brakes if the trailer reservoir pressure leaks down. If you depend on them to hold your vehicle, they could release, causing a serious accident. These older trailers have emergency brakes not designed for parking. They will apply only if there is enough trailer reservoir pressure. Don’t use your trailer emergency brakes for parking. Apply your tractor parking valve too.

02909

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Parking Brakes and Their Use PART 7: STARTING & O PER ATING THE VEHICLE

WARNING!

• Do not leave the cab without applying the parking brake. T he truc k could roll and cause an injury accident. Always apply the parking brake before you leave the cab.

• Stopping with the parking brake controls can cause a sudden wheel lock-up, loss of control, or can cause you to be overtaken by following vehicles. You could be severely injured. Never pull out the parking brake valve while the vehicle is moving.

• Do not use the trailer hand brake or service brakes to park and hold an unattended vehicle— use the parking brakes. Because service brakes work with air pressure, these brakes could slowly release. Your vehicle could roll, causing a serious accident. Someone could be hurt or killed. Never rely on the service b rakes to hold a parked vehicle.

• Never drive your vehicle with the parking brake applied. Always release the parking brakes prior to moving the vehicle. Failure to disengage the parking brakes prior to moving your vehicle could result in excessive

heat build-up in the brake system, resulting in a ﬁre.

NOTE: Today’s diesel electronic engines have signiﬁcant torque and startability pow er at low RPM. Combinations of engine speed and available torque may over-power the vehicle’s parking brakes.

To apply all your parking brakes, pull the yellow knob Out. The parking brakes will set. And the trailer air supply valve (red octagon knob) will automatically pop out, releasing air p r essure and setting the trailer brakes.

CAUTION: Do not try to put the vehicle in motion before pressure in the system reaches 100 psi (689 kPa) because the wheels are locked by the spring brake action. Unnecessary stress and possible brake malfunction could occur if the vehicle is forced to move before the air system reaches 100 psi (689 kPa).

To release your truck or tractor brakes ONLY, push in the yellow knob. Your trailer will remain parked.

• To release the trailer brakes ONLY, push in the red knob. The truck or tractor will remain parke d.

– 94 – Y53-6015 R(08/07)

PART 7: STARTING & OPERATING THE VEHICLE Manually Releasing Spring Brakes

• To release the full combination of brakes, push in BOTH yellow and red knobs.

Trailer Air Supply Valve

The red octagon knob controls the air supply to the trailer. To supply air to the tra iler system and release the trailer parking brakes:

• Allow the tractor air system pressure to build up to operating level.

• Pushtheredknobin.

• Holdtheredknobinbyhanduntilthetrailerairpressure b uilds to a pre-set level, abo u t 45 psi. At this point it will remain in.

The yellow knob will remain out; the tractor w ill remain parked. If you ever have a failure or disconnect of the air supply hose to the trailer, the trailer parking brakes will s et. The red knob will automatically pop out and seal off the tractor air reservoirs to pr ot ect the tractor air system pressure. When operating the tractor “bobtail”: The red knob must remain out to protect the tractor air system pressure

Manually Releasing Spring Brakes

There may be an occasion when you need to tow the vehicle but the air system does not produce enough operating pressure to release the parking brakes. For these situations, the spring brakes may be manually released to allow the vehicle to be towed. This sections details how to release a drum or an air disc brake.

WARNING!

• Do not operate a vehicle when the spring brakes have been released manually. Driving a vehicle that has had its spring brakes manually released is extremely dangerous. You would probably have no brakes at all. You could have a serious or fatal accident.

• Releasing the spring brakes on an unsecured vehicle could lead to an accident. The truck could roll, causing severe injury. Always secure the truck with wheel chocks, chains, or other safe means to prevent rolling before manually releasing the spring brakes.

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Manually Releasing Spring Brakes PART 7: STARTING & OPERATING THE VEHICLE

3. Slide out the release stud.

NOTE: The primary purpose of the manual release feature is to permit the vehicle to be towed to a repair facility.

To release spring brakes manually

1. Remove the cap from the spring chamber.

01897

4. Insert the release stud through the opening in the spring chamber where the cap was rem oved. Insert itintothepressureplate. Turnthereleasestud1/4

01895

2. Remove the release stud assembly from the s ide pocket, and remove the release nut and washer from

turn clockwise in the pressure plate. This secures the cross pin into the cross pin area of the pressure plate and locks it into the manual release position.

the release stud.

01898

01896

– 96 – Y53-6015 R(08/07)

Peterbilt 320 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual