Peterbilt 387 Operator’s Manual after 1-07 Peterbilt 387 Operator’s Manual after 1-07

PART 1: INTRODUCTION

This manual contains useful information for the safe and

efficient operation of your Peterbilt Model 387. It also pro vides 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 opera tion—and to present it as clearly as possible. We hope you’ll find this manual easy to use.

Please remember, though—this manual is not a training manual. It can’t 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.

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.

How To Find What You Want

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 indicate that in a cross-reference like this: (See

“PART 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 cov ered. 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.

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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 facility. If you aren’t an experi enced 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 cor rectly.

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. If you do decide to do any complex 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-build your Peterbilt vehicle is available through the Peterbilt dealer from whom your purchased your vehicle.

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 make sure it can be done safely.

Additional Sources of Information

Operator’s manuals are also supplied by the manufacturers 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.

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Your Model 387’s glove box 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 transporta tion across state lines. And various agencies in state governments are sources for regulations that differ from state to state.

WARNING! When you see this symbol & word, the message that follows is especially vital. This signals something that can cause seri ous 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 qual ified to do.

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 pre vent costly damage to your vehicle. We’ve used certain symbols and “signal words” to indicate what kind of mes sage 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.

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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.

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 liquefy and warp the valve plates or cause a hydraulic 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”.

“PA R T 6 :

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 time of manufacture. However, even with these safety fea tures, continued safe and reliable operation depends greatly upon regular vehicle maintenance. The vehicle must be operated within the range of its mechanical capa bilities and the limits of its load ratings. (See the Tire and Rim Weight Ratings label on the driver's door edge.)

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PART 2: GETTING INTO & OUT OF THE 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.

WAR NING! 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 han dles provided, and always keep at least three points of contact between your hands and feet and the truck. Look where you are going.

The illustrations that follow show the best ways to enter and exit a cab.

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Vehicle With External Grab Handle

02958-A

02958-B

Vehicle Without External Grab Handle

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 lock. Doors automatically unlock when you open them from inside, and can be locked from the outside with the key only.

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; for ward to unlock.

Remote Keyless Entry (optional)

This vehicle may be equipped with a Remote Keyless Entry (RKE) system that adds security and convenience to your vehicle. The system will lock or unlock the driver’s door and passenger’s door with the key fob and alert you with parking lights when the selected door’s are locked or unlocked. The system includes two key fobs that provide secure rolling code technology that prevents someone from recording the entry signal.

Operation

To Unlock The Driver’s Door

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Press the UNLOCK button once. The driver's door will unlock and the parking lights will come on for 40 sec onds.

To Unlock The Passenger’s Door

Press the UNLOCK button once and press again within 5 seconds. The passenger door will unlock.

To Lock Both Doors

Press the LOCK button. The doors will lock and the parking lights will come on for 2 seconds. If the doors are open they will not lock. The range of the RKE sys tem should be approximately 30 ft. This will be reduced if it is operated close to other RF sources such as TV/radio transmitters and cell towers.

Batteries

The key fob uses one CR2032, 3V battery. Batteries should last approximately three years, depending on use. Consistently reduced range is an indicator that the battery needs replacement. Batteries are available at most dis count, hardware and drug stores.

To Replace The Battery

1. Remove rear cover from key fob.

2. Remove the battery.

3. Install new battery.

4. Reinstall cover.

5. Synchronize the key fob.

Synchronization

The key fob may need to be synchronized to the truck when the battery is replaced or when the key fob has not been used for an extended period time.

To Synchronize A Key Fob

1. Hold the key fob near the receiver.

NOTE: The receiver is located behind the Speedometer/Tachometer cluster assembly.

2. Press and hold both the Lock and Unlock buttons at the same time for approximately 7 seconds.

3. When the key fob is resynchronized, the doors will

lock then immediately unlock.

4. If the fob fails to synchronize, it could be programmed to a different truck or could have failed. Contact your dealer to re-program your key fob.

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Climbing Onto the Deck Plate

When you are climbing onto and off the deck plate, maintain at least three points of contact with your hands on the grab handles and your feet on the steps.

WARNING! Do not step on vehicle components without antiskid surfaces or use components not designed for entry-and-exit use. You could fall and injure yourself if you step on a slippery surface. For example:

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 deckplate–use steps and grabhandle 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.

The pictures that follow show you the right way to get on and off the area behind your cab.

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• You could fall and injure yourself if you step onto a fuel tank surface. A fuel tank is not a step. The tank surface can get very slippery, and you might not be able to prevent a fall. Don’t step onto the surface of a fuel tank. Use only the steps and handholds provided, not chain hooks, quarter fenders, etc.

• Always reinstall steps before entering the cab or accessing the deck plate. Without steps, you could slip and fall, resulting in possible injury to yourself.

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

Hold handles as you step up

Three points of contact as you reach the deck area

Three points of contact

Three points of contact as you step to the deckplate

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PART 3: GETTING TO YOUR ENGINE

Hood Tilt

Follow this procedure to tilt the hood.

WARNING! Before opening or closing the hood, be sure there are no people or objects in the way. A hood could hurt someone in the way of its opening or descent.

1. To open your hood, find the hood release handle on the cab floor beside the driver’s seat.

Hood release handle

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2. Grasp the lever and turn it towards you. The hood will release and pop open to a neutral position, approxi mately 2” above the closed position.

WARNING! The hood uses hydraulic dampers to control movement during opening. Do not tilt the hood with these dampers discon nected. Replace damaged, worn, or leaking dampers as soon as possible. Tilting a hood with the dampers disconnected or defective may cause the hood to tilt too rapidly. You could be injured and the hood could be dam aged.

3. Proceed to the front of the vehicle and face the hood. Grasp the hood ornament on the top of the crown molding. Pull forward and down until the hood is fully open and rotation stops.

WARNING! If the hood falls, anyone under it

could be injured. Always ensure that a hood is fully tilted open any time anyone gets under a hood for any reason.

4. To close the hood, firmly push upward and rearward

on the hood ornament to start the hood tilting back wards. Continue to push until the hood moves through its neutral position. The hood will continue to tilt back wards. Apply a firm push to the hood ornament to engage the hood latches located on both sides of the

firewall.

WARNING! If the hood is not latched securely, it could open during operation and cause an accident. Be sure the hood is latched securely before moving the vehicle

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PART 4: CONTROLS AND DISPLAYS

This part explains the location of the various features on your vehicle and describes their function. For information on using these features in driving, see the paragraphs below.

Your Instrument Panel

Please remember that each Model 387 is custom-made. Your instrument panel may not look exactly like the one in the pictures that follow.

We have tried to describe 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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Typical Cab Instruments and Controls

LEFT SIDE

2. Ignition Switch 11. Primary Air Pressure

3. Headlamps Switch 12. Secondary Air Pressure

4. Voltmeter 13. Fuel

5. Oil Pressure 14. SMC Select/Reset Switch

6. Tachometer 15. Dome Light Switch

7. Warning Light Bar 16.

Windshield Wiper/Washer

8. Speedometer-Message 17. Panel Dimmer Center (SMC)

1. ID/Clearance Lamps Switch 10. Air Cleaner Restriction

9. Water Temperature 18. Cigarette Lighter

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RIGHT SIDE

1. Parking Brake Valve 12. Engine Brake

2. Trailer Air Supply Valve 13. Engine Brake

3. Heater/AC Control Panel 14. Load Lights Switch

4. Fog Lights Switch 15. Interaxle Differential Lock Switch

5. Engine Fan Switch 16. 5th Wheel Lock Switch

6. ID/Clearance Lamps Flash 17. Air Suspension Switch

Switch

7. Trailer Brake Lever 18. Radio

8. Cruise Control Switch 19. CB Radio

9. Transmission Temperature 20. Selected Option Switch

10. Cruise Control Switch 21. Mirror Heater Switch

11. Pyrometer

02972A

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Steering Column-Mounted Controls

Turn Signal and Indicator Lights

Turn Signal

Your turn signal lever is mounted on the left side of the steering column below the steering wheel. Green direc tional indicator lights appear on the instrument panel.

NOTE: The ignition key must be turned to ON for

the signal/switch to operate.

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

WARNING! After you complete a turn, shut the system off by returning the lever to the “OFF” (center) position. The switch's lever action is NOT self-canceling. Failure to shut off a turn signal could confuse other drivers and result in an injury accident. An indicator light in the instrument panel will flash until the turn signal is turned off.

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Hazard Flasher

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.

WAR N ING! 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. Another vehicle could run into you if you do not set your flashers. Always move the vehicle a safe distance off the road when stalled or stopped for repairs.

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

Hazard Flasher

The four-way Hazard Flasher switch is on the turn signal body, just underneath the turn signal lever. It will operate with the key switch in the ON or OFF position. Use your hazard flasher whenever you are off the road or on the side of the road, or in a potentially hazardous situation.

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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 where the exhaust system could con tact dry grass, brush, spilled fuel, or any other material that could cause a fire.

High Beam Headlights

Electric Horn

Your Peterbilt has an electric horn. To sound the horn, press on the bar in the center of the steering wheel

High Beam Headlight Switch

Electric Horn Bar

Air Horn

All Peterbilt vehicles come equipped with a combination turn signal and high beam/low beam switch. To switch your headlights lower or higher, gently pull the turn signal lever up, towards the steering wheel, until you hear the switch “click” and the beam changes.

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Your Model 387 has an air horn in addition to an electric horn. Control the air horn by pulling on the lanyard extend ing from the overhead header panel.

Trailer Brake Hand Valve

02975A

This hand valve provides air pressure to apply the trailer brakes only. It operates independently of the foot treadle valve.

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

To operate the trailer brake hand valve: pull down on the lever under the right side of the steering wheel.

See the Index, under Brake Safety and Emergency for more complete information on when and how to use your trailer brake

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 vehi cle roll-away resulting in an accident. You or others could be badly injured. Always apply the parking brakes for parking or holding your vehicle on grade.

• Grabbing the trailer brake hand lever instead of the BrakeSaver lever could lead to an accident. If you have these levers, they may be close together on your steering wheel column. Be sure you get the one you want. The BrakeSaver lever is bent, while the trailer parking brake lever is straight.

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Tilt-Telescoping Steering Column

WARNING! Adjusting the Tilt-Telescoping Steering Wheel while the vehicle is in motion could cause loss of control. You would not be able to steer properly and could have an acci dent. Make all adjustments to the steering mechanism while the vehicle is stopped.

To position the wheel: Locate the Tilt-Telescope Lever on the floor, to the left of the steering column. Push this lever toward the floor. Move the steering wheel to the desired angle and height. Release the lever to lock in the correct position.

Dash-Mounted Features

Tilt-Telescope Lever

The telescoping feature of the steering wheel allows forward and rearward movement of the wheel. The tilting feature allows you to move the wheel up and down.

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Keys and Locks

The same key fits your ignition, doors, and sleeper luggage compartment. Frame-mounted tool box locks, locking fuel tank caps, and glove boxes each have individual keys.

Ignition Switch

ACC ONLY

• IGN & ACC: This position allows you to turn on the engine and all accessory power.

• START: Starter activation to start engine.

OFF

Headlights

IGN & ACC

START

02890

02977A

The headlights are controlled by the control panel switch showing this symbol. When the headlights are ON, the

Your ignition switch has four positions:

• ACC (Accessory): With your key in this position you can play the radio or use other accessories, but your engine won’t start.

• OFF: In this position all systems are off, and you can remove your key.

dash lights, side, and tail lamps are also on.

NOTE: On vehicles equipped with daytime running lights (DRL), the inboard park-and-turn lamps go on automatically at reduced brightness if the engine is running and the headlamp switch is turned off. The daytime running lights are turned off automatically while the parking brake is engaged.

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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.

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, clearance lights, or fog/ driving lights with IGN on.

2. To brighten the instrument panel lights, turn the knob clockwise (to the right).

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

ID and Clearance Lights Switches

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 may be turned on and off by the switch located on the lower left control panel labeled CL LPS and showing the symbol below.

02892

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When your clearance lights are turned on, you may blink or flash them by operating the flash switch located on the right side of the dash showing the symbol below. Press and release this rocker switch to flash your clearance lights.

Fog/ Driving Lights Switch

03021

If your vehicle has fog/driving lights, turn them ON or OFF

03912-1

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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Dome Light Switch

02894A

A momentary switch controls the main dome light:

– Press a third time: Light will turn off.

Windshield Wipers and Washers

02896

Wiper

To turn on the wipers rotate the knob to the right. As the knob is rotated, the speed of the wipers increases. To turn off the wipers, rotate the knob to the left.

• OFF (O) Position: Light is off.

• ON (I) Position:

– Press once: Light will turn on at high intensity.

Washer

To use the washer, push the knob showing the symbol above. With the electric wipers, the wipers will come on for a short time when the washer starts.

– Press again: Light will shift to low intensity.

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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 lintfree cloth, and wipe along the blades.

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

Intermittent Windshield Wiper Control

Two-speed intermittent windshield wipers are controlled by the control panel knob with the symbol shown above. To turn on the wipers, rotate the knob to the right.

As you turn the knob further to the right, intermittent delay decreases until the knob encounters the first position for continuous operation. Turn the knob further right to the next position for higher speed continuous operation. Turn off the wipers by rotating the knob to the left.

Air Suspension Deflate Switch (Dump Valve)

AIR SUSPENSION

03035

Your Model 387 may have an air suspension deflation switch that allows the air in the suspension to be exhausted from a switch on the dash. 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 pre vents 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.

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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.

Engine Fan Switch

03023

The engine fan switch allows you to control the engine fan manually or automatically. With 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

fan switch in the AUTOMATIC position, the engine fan will automatically turn on when the engine coolant reaches a temperature of about 200

°F.

WAR N ING! 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 with out warning. Before turning on the ignition or switching from AUTOMATIC to ON, 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 equip ment such as rags away from the fan, and take care no one turns on the ignition when some one is working near the fan.

CAUTION: 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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Mirror Heat Switch

Power Mirror Switch

03022

The power mirror control controls the adjustment of the right or left outside mirrors, depending on the option selected. It is located in the driver side armrest.

Mirror heat is controlled by the control panel switch shown above. If the vehicle is equipped with this switch, mirror heat can be switched on to help remove frost and ice from the mirror glass.

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

WARNING! Convex mirrors can distort images and make objects appear smaller and farther away than they really are. You could have an accident if you are too close to another vehi cle 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.

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Cruise Control Switch

CRUISE

ON/OFF

SET

CRUISE

SELECT

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

your vehicle.

Engine Brake

03025

The master switch turns the cruise control ON or OFF.

RESET

03026

03028

The second switch allows you to SET the desired speed or RESET the desired speed after the cruise control func tion has been interrupted.

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 nor mal operation of the cruise control could cause you to lose control of the vehicle resulting in an injury accident.

When an engine brake is energized, the power-producing

diesel engine is converted into a power-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.

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

• In Caterpillar- and Cummins-powered vehicles equipped with a Jacobs Engine Brake, a second twoor three-mode switch is incorporated in the instrument panel. With this system, you can select either LOW or HIGH or LOW/MEDIUM/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.

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.

Two-Speed Rear Axle (Range) Switch

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.

For information on how to operate your two-speed rear axle properly and safely, see

“PART 7: STARTING &

OPERATING THE VEHICLE”.

Interaxle Differential Lock Switch

03030

The interaxle differential allows differential action between

SHIFT AT ANY SPEED EXCEPT IF A WHEEL IS SPINNING

03029

the forward rear and the rear rear driving axles. The inter axle differential lock switch allows the operator to LOCK or

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UNLOCK the differential. The guard over this switch prevents you from accidentally activating the lock. See “Inter-

axle Differential” on page 81 for more information on using

your interaxle differential.

WAR N ING! 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.

Fifth Wheel Lock (Slider Adjustment) Switch

CAB CONTROL

03031

Vehicles having an air slide fifth wheel have a fifth wheel slider lock controlled by a switch on the instrument panel. By placing the switch in the unlock position, you can slide the fifth wheel to various positions to adjust weight distri bution. There is a guard over this switch to protect you against accidentally activating or releasing the lock.

WARNING! Do not move the fifth wheel while 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.

CAUTION: Both the fifth wheel plate and the slide tracks (if a slider) should be cleaned and lubricated periodically to ensure smooth turn ing and sliding action. Failure to keep these surfaces lubricated can lead to frame or drive line damage.

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Parking Brake Valve and Trailer Air Supply Valve

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.

• 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.

Your parking brake valve is a yellow diamond-shaped knob located below the right instrument panel. It controls the parking brakes.

To apply all parking brakes, pull the yellow, or parking brake, knob out. The truck or tractor parking brakes will set, and the Trailer Air Supply Valve (red octagon knob) will automatically trip (“pop out”) and set the trailer parking brakes. To release both truck/tractor and trailer parking brakes, push in BOTH yellow and red knobs. For full infor mation on using parking brakes, see section titled “Park-

ing Brakes and Their Use” on page 98 for more

information.

(R10/06) Y53-6007 – 33 –

• Do not use the trailer hand brake or service brakes to park and hold an unattended vehi cle—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 brakes to hold a parked vehi cle.

WARNING! 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 exces sive heat build-up in the brake system, resulting in a fire.

Heater-Air Conditioning Controls

Your heat and air conditioning controls are mounted in the right hand instrument panel. Additionally, the sleeper com partment may also contain a separate heating and cooling system with separate 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/sleeper and causes serious illness.

CAUTION: Never idle your vehicle for prolonged periods of time if you sense that exhaust fumes are entering the cab . Investi gate 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 per sonal harm.

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

• by a competent 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.

– 34 – Y53-6007 (R10/06)

NOTE: Do not stay in the vehicle with the engine running or idling for more than 10 minutes with the vehicle’s Heater / AC 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.

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.

NOTES: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.

To Set the Heater-Air Conditioning Controls

The cab’s control panel may have up to six controls (see illustration below):

• A rotary knob (A) in the upper left portion controlling the blower speed with four settings.

• A rotary knob (B) in the upper center portion controlling the movement of air within the cab. This control is continuously variable through five modes (clockwise from left):

– Panel

– Panel/Floor

–Floor

– Defrost/Floor

–Defrost

• A rotary knob (C) in the upper right portion controlling the air temperature.

• A rocker switch (D) in the lower left portion to engage the air conditioner compressor.

(R10/06) Y53-6007 – 35 –

• A rocker switch (E) on the lower center portion to send power to the “bunk” or sleeper control panel.

• A rotary knob in the right portion controlling the air temperature.

• A rocker switch (F) in the lower right portion to select either fresh or recirculated air mode.

02980B

The sleeper control panel will have two controls (see next illustration):

• A rotary knob in the left portion controlling the blower speed with four settings.

02981B

The cab “bunk” control rocker switch must be ON for the sleeper controls to function.

• To heat the cab, select the desired air mode and set the temperature knob to hot (the red position on the control) and the blower to whatever speed makes you most comfortable.

WARNING! Do not drive with visibility reduced

by fog, condensation, or frost on the wind shield. Your view may be obscured, which could result in an injury accident. For clear visibility and safe driving it is extremely im

– 36 – Y53-6007 (R10/06)

portant 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. Maxi mum 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 gradu ally increase the temperature when you see that the windshield is starting to warm up.

• To defog the windshield, select the Defrost mode and turn the blower speed to high. Set the tempera ture knob to hot (the red position on the control). The air conditioner is automatically activated to remove moisture from the cab. After the windshield is clear, adjust the mode, blower speed, and temperature to your comfort.

• To cool the cab, turn on the A/C switch, set the temperature knob to cool (the blue position on the control), and the blower to high until the cab becomes

cool. Then you can turn down the blower if you wish.

For Efficient Cooling:

1. Be sure all heater - air conditioner controls are off.

2. Start the engine. Allow time for 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.

• Turn off all controls when the system is not in use. Doing so will avoid damage to the

air conditioning system components.

3. Set the air control in the RECIRC mode.

4. Close all windows.

5. Idle the engine between 1000 and 1500 RPM and turn the blower speed control to high.

(R10/06) Y53-6007 – 37 –

6. After the cab temperature cools to a comfortable level, adjust the blower speed and controls to keep the desired condition.

NOTE: When the air conditioner isn’t in regular use, operate it for at least 15 minutes at least once a month or every 5,000 miles(8,000 Km), whichever comes first. This will lubricate the seals in the air conditioning system. The air condition ing system is active when the Defrost mode is selected.

Cigarette Lighter

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 protected by a 10-ampere polyswitch to prevent damage should the lighter get stuck in the IN posi tion. If this fuse needs replacement, check to ensure that the lighter is not stuck before replacing the fuse.

WAR NING! 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 10 amperes maximum.

Ashtray

02912

Lighter

– 38 – Y53-6007 (R10/06)

WARNING! Paper or other combustible substances in an ashtray could cause a fire. Keep all burnable materials besides smoking mate rials out of the ashtray.

Glove Compartment

To open your glove compartment, pull the latch. To close it, push the cover up and press to latch it.

The glove compartment can be locked. Turn your glove box key clockwise (right) to lock and counterclockwise (left) to unlock.

WAR NING! An open glove compartment can be dangerous. In an accident or sudden stop, you or a passenger could be thrown against the cover and injured. Keep the cover closed when the vehicle is in motion.

Gauges

On the pages that follow you will find descriptions of some of the gauges on your instrument panel. For more infor mation about using them in driving, see “PART 7: START-

ING & OPERATING THE VEHICLE”. Also check the Index

under the name of the gauge or function you want to know more about.

WAR N ING! 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 could lead to an accident. Have the appropriate system checked immediately.

NOTE: All of the warning lights and alarms for functions monitored by the multiplex instrumentation system instrument 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 instru ment panel. They are described further in “PA RT

7: STARTING & OPERATING THE VEHICLE” of

this manual.

(R10/06) Y53-6007 – 39 –

Speedometer-Message Center (SMC)

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 miles & 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

11243

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 7character, segmented LCD screen that can display the fol lowing items:

• Odometer • Hourmeter

• Trip 1 odometer • Clock

• Trip 2 odometer • Clock alarm

• 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).

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

• Warning and Diagnostic messages (see page 117)

– 40 – Y53-6007 (R10/06)

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

1. Turn the ignition switch to ON.

2. Choose the desired function.

3. Set or reset the function:

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

• Clock

a. Press & release the Reset switch; the hours

digit will flash.

b. Press & hold the Select switch; the hours dig-

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

c. Press & release the Reset switch; the hours

digits 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 min-

utes digits will stop flashing. The clock is now set.

• Clock Alarm

a. Press & release the Reset switch; the hours

digit will flash.

b. Press & hold the Select switch; the hours dig-

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

c. Press & release the Reset switch; the hours

digits 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 min-

utes digits will stop flashing. The alarm is now set and activated (the “*” symbol will show in the clock display to indicate this).

– To turn the alarm OFF or ON, press &

hold the Select switch for 3 seconds while viewing any display.

(R10/06) Y53-6007 – 41 –

– To deactivate the buzzer when the alarm

sounds, press & release the Select switch. (Note: The alarm will automati cally 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 nor mally while awake; it will return to a “sleep” mode 20 seconds after a switch is last pressed.

Further use and operation of the SMC is covered in “PA RT

7: STARTING & OPERATING THE VEHICLE” of this man-

ual.

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.

– 42 – Y53-6007 (R10/06)

Air Application Gauge

11458

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

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:

1146

The secondary gauge shows rear reservoir pressure.

1146

(R10/06) Y53-6007 – 43 –

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 wheel lockup, loss of control, or your vehicle to be overtaken by fol lowing vehicles. You could be in an accident and severely injured. If these alarms come on while you are 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 you normal operating pressures for your particular engine.

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

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

– 44 – Y53-6007 (R10/06)

• If your oil pressure suddenly drops while you are driving, bring the vehicle to a stop as soon as possible in a safe location off the road and 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 cen ter.

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°

and 210° - 225° F (99° and107° C), depending on the engine. Under certain conditions, somewhat higher tem peratures may be acceptable. But the maximum allowable temperature is 225° F (107° C) with the cooling system pressurized, except 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.

(R10/06) Y53-6007 – 45 –

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, care fully and slowly turn the cap part way to allow excess pressure to escape. Then push down and turn for final removal.

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.

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

Fuel Gauge

• With the transmission in neutral, check to be certain

11435

the oil pressure gauge reads normal. Increase the engine speed to about 1100 - 1200 RPM, maximum.

– 46 – Y53-6007 (R10/06)

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.

Warning Lights and Buzzers

WARNING! Ignoring a warning light or buzzer 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 your brakes. Never ignore a warning signal. Have the appropriate system checked right away.

When you turn on your ignition, the following will turn on for 3 - 5 seconds, as a test to let you know they are work ing.

LAMPS:

• Left Turn • Fifth Wheel

• Check Engine • Seat Belts

• Stop Engine • Right Turn

• Diff Lock • High Beam

• ABS • Trailer ABS

OPTIONAL LAMPS: Additional lamps may be operational depending on how the truck is equipped. These will also turn on for three seconds as a test to let you know they are working. (See ABS lamp information on

page 89.)

After this self-test period, the module operates normally.

09091

(R10/06) Y53-6007 – 47 –

The warning lights 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. These lights could save you from a serious acci dent.

Emission System Lamps

This vehicle may be equipped with an exhaust system that meets 2007 EPA emission requirements. The following lamps wil be on your dashboard

Emissions, Diesel Particulate Filter (DPF)

Transmission Temperature Gauge

Illuminates when diesel particulate trap is plugged. This warning will also illuminate when regeneration operation is disabled.

Emissions, High Exhaust System Temperature (HEST)

Illuminates when the exhaust gas temperature and exhaust components become extremely hot.

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.

11427

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 man

ual.

– 48 – Y53-6007 (R10/06)

Front Drive Axle or Rear Drive Axle Temperature Gauge

11425

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 the kind of load you are carrying and the driving condi tions 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 per

son.

(R10/06) Y53-6007 – 49 –

Pyrometer

11467

Your vehicle may be equipped with a pyrometer gauge. The pyrometer gauge indicates engine exhaust gas tem perature. Since it responds almost immediately to changes in exhaust gas temperature, the pyrometer is an excellent indicator of engine output.

Monitor it in conjunction with the tachometer and manifold pressure gauge. The pyrometer can be a useful aid to operating your vehicle more efficiently and avoiding sud

den changes in engine operating temperature. See your engine owner’s manual for maximum temperature recom mendations.

Voltmeter

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.

11497

– 50 – Y53-6007 (R10/06)

Air Filter Restriction Indicator Gauge

11495

This gauge indicates the condition of the engine air cleaner and is measured by inches of water (H

clean filter should register 7” H

O (may vary with system

design); a filter whose life is over will register approxi mately 20” H2O (for Cummins engines) or 25” H2O (for

Caterpillar engines).

O). A

CAUTION: Continued operation with the Air Filter Re-striction 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.

Shift Pattern Display

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

Mirrors

WARNING! Optional convex outside rearview

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.

(R10/06) Y53-6007 – 51 –

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.

Luggage Compartment(s)

An interior luggage compartment is under the bunk in the sleeper. The exterior compartment is beneath the bunk, opening from the driver’s side, on the outside of the cab.

WARNING! Carrying objects loose in your cab or sleeper can be dangerous. In a sudden stop, or even going over a bad bump, they could fly forward and strike you or a passen ger, possibly causing serious injury. Secure loose objects. Carry any heavy objects in the exterior luggage compartment and close it securely.

Appliances in the Cab

You may decide to equip your vehicle with a radio, a refrigerator, or other appliances and conveniences. Be sure they are compatible with your truck’s electrical system. Secure them in the cab so they can’t fly loose in a sudden stop.

WARNING! In a sudden stop or collision a heavy object in your cab could strike you or anyone with you. You could be injured or killed. Secure any appliance (such as a refrig erator or radio) you add to your cab.

Refrigerator

Follow the procedure below to operate the refrigerator.

CAUTION: Leaving your refrigerator on when the vehicle’s engine is not running will rapidly run down your vehicle’s batteries. This may cause premature battery failure.

– 52 – Y53-6007 (R10/06)

NOTES:

• For additional information about the refrigerator, refer to the refrigerator owner’s manual that came with this appliance.

• Refrigerator cooling ability decreases as sleeper temperature increases.

The main power supply to the refrigerator and cooling fan (located behind the refrigerator) is controlled by a switch labeled "REFRIG/FAN" located on the sleeper control panel.

• To turn the refrigerator and cooling fan on, move the REFRIG/FAN switch to ON, then turn the thermostat dial (located inside the refrigerator) clockwise from the OFF setting.

• To turn the refrigerator and cooling fan off, turn the thermostat dial inside the refrigerator counterclock wise to the OFF setting, then move the REFRIG/FAN switch to OFF.

• To turn only the refrigerator off, turn the thermostat dial counterclockwise to OFF.

(R10/06) Y53-6007 – 53 –

– 54 – Y53-6007 (R10/06)

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 with 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.

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 emer gency. 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 fas ten your seat belt.

(R10/06) Y53-6007 – 55 –

02998

Person In Crash, Unbelted

Shoulder Belt

Your combination shoulder-lap belt needs proper adjustment:

• The lap portion should be worn as low on the hips as possible

Properly worn belt

– 56 – Y53-6007 (R10/06)

Improperly worn belt

WARNING! 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 bones. This could cause serious inter nal injuries. Always wear your seat belt low over your pelvic bones.

• The shoulder portion should fit snugly across your body. It should always be worn over the shoulder next to the door. It you put the belt under your arm, it can’t protect you properly.

Correct (over arm)

(R10/06) Y53-6007 – 57 –

• 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 abdo

men.

WARNING! A too-loose seat belt can lead to injury in a crash. It can allow you to fall too far forward, possibly causing head and neck inju

ries. You could strike the wheel or the windshield. Adjust your belt so that there is no more than one inch (25 mm) of slack.

• Watch that you don’t twist the belt in the process of put-

Incorrect (under arm)

ting it on. A twisted belt won’t work as well to protect you.

WARNING! Wearing the shoulder belt under your arm could lead to serious injury. In a crash your body would move too far forward, increasing the chance of head and neck injury. The belt would apply too much force to the ribs, which aren’t as strong as your shoul

der bones. You could also suffer internal injuries. Wear the shoulder belt over your shoulder.

02930

Twisted Belt

– 58 – Y53-6007 (R10/06)

WAR N ING! You could be seriously injured by a twisted belt. In a crash, the full width of the belt wouldn’t be protecting you. And the twisted belt could cut into your body. Straighten the belt before buckling it. If you can’t, have your dealer or service person fix it.

To connect your shoulder-lap belt: Grasp the belt tongue and pull in a smooth, slow motion across your chest and lap. Insert the tongue into the buckle on the inboard side of the seat. Push down until you hear a click. Pull on the belt to make sure it is buckled. Check that it is positioned correctly on your body.

Comfort Feature

Your Peterbilt contains a feature designed to eliminate cinching and provide improved safety and comfort. Cinch ing 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, par ticularly over long distances.

To eliminate cinching simply activate the comfort 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 (about 1 inch) in the belt. Be sure to allow only a small amount of slack. See the Warning on a loose belt, on the previous page.

3. When the slack is right, slide the comfort feature up When the slack is right, flip the latch cover up, cinch ing it into place. This locks the Komfort-Lok.

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 worry

that in a crash the seat belt could hurt the baby. But if a woman wears her belt 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.

(R10/06) Y53-6007 – 59 –

Pregnant Woman With Belt Properly Worn

Sleeper Bunk Restraints

If your cab is equipped with a sleeper, be sure to use the restraint device. You may have belts which either are over the bunk or cover the opening. Of course, you do not need to use a restraint if you sleep in a parked vehicle. But any one using the sleeper while the truck is in motion should be restrained in a safety device.

CAUTION: To avoid damage when lifting a bunk, remove all items from the top of the bunk mattress, and arrange bedding so that items will not slide down the mattress and fall behind the bunk.

The bunk restraint is attached to the sleeper in six locations (see illustration below):

1. Two buckles at the upper rear wall

2. Two buckles at the side walls

3. Bolts in two places at the lower rear wall

There is also a buckle at the driver’s side front of the bunk for easy entry/exit of the sleeper with the bunk restraint in use.

– 60 – Y53-6007 (R10/06)

• The lower rear wall: The restraint is attached to the

lower rear wall by bolts that do not require removal for use or stowage of the bunk restraint.

You will notice that if your Peterbilt has an upper bunk, it has no restraint device. This is because no one should ever be in an upper bunk when the vehicle is moving.

WARNING!

a sleeper bunk could be seriously injured. He or she could be thrown from the bunk. Be sure anyone occupying the sleeper is

• In an accident an unrestrained person lying in

restrained while a vehicle is moving.

• Be sure that no one ever rides in the upper bunk. That person would be thrown out in

• The upper rear wall: Access to the bunk is easiest when these connections are buckled and the front buckle is detached.

• The side walls: The tenting straps are attached to the side wall sills with easy-to-use buckles.

Passengers

Anyone riding in your vehicle should wear a seat belt. The responsible operator sees to it that everyone in the vehicle

an accident and could be very seriously injured.

rides safely - and that means with a seat belt.

(R10/06) Y53-6007 – 61 –

Some Other Safety Restraint Tips:

Tether Belts

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

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

• 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 fol lowing 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.

Tether belts are installed on suspension seats. They help secure the seat to the floor to restrain it in case of a sud den 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.

Tether Adju stment

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

– 62 – Y53-6007 (R10/06)

injury may occur if head clearance is not adequate. Shorten the tether belt as neces sary to provide adequate head clearance.

• 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.

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 inspec tion 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 vehi cles often see this type of mileage in a very short period of time, and accumulation of mileage in excess of 500,000 miles (800,000 km) during the vehicle life time is not unusual.

• A significant 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 nor mally occurs whenever the truck is in operation, can cause wear of the seat belt webbing.

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• Environmental conditions represent another major difference in the systems in automobiles and heavy duty and specialty vehicles. Unlike the automotive environ ment, 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 contin ual 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 envi ronmental conditions make it crucial to inspect the threepoint 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 shows cuts, fraying, extreme or unusual wear, significant discoloration due to UV exposure, abrasion to the seat belt webbing, or dam age 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 that any time a vehicle is involved in an accident,

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, hard ware, or other factors which indicate that belt replacement is necessary.

1. Check the web wear in the system. The webbing must

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.

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 typ

– 64 – Y53-6007 (R10/06)

ical places where the web will experience cutting or abrasion. Cuts, fraying, or excessive wear would indi cate the need for replacement of the seat belt system.

2. The D-loop web guide is the area where almost constant movement of the seat belt webbing occurs because of relative movement between the seat and the cab.

3. Check the comfort feature 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.

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5. Inspect the retractor web storage device, that is mounted on the floor or B-pillar of the vehicle for dam age. The retractor is the heart 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 ultravi olet rays; replace the system.

WAR NING! 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 INSTALLATION 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 com ponents must be remounted back in the same position as

– 66 – Y53-6007 (R10/06)

the original 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 rec ommended 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 har ness system, because the cab mounting points are not structurally designed for a three-point seat belt.

(R10/06) Y53-6007 – 67 –

– 68 – Y53-6007 (R10/06)

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 inspec tion 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 can’t fix it yourself, please have a qualified mechanic fix it 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 manufacturing of your Peterbilt, including advanced engineering techniques, rigid quality control, and demanding inspections. These manufactur ing 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

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WARNING! Do not 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 acci dent—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

MAINTENANCE AND SERVICE” for the complete preven-

tive maintenance schedule for your vehicle.

“PA R T 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 lubri cation? Have a qualified mechanic examine any ques-

tionable items and repair them without delay.

Checking Under the Hood or Cab

With the engine stopped:

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

2. Check the engine coolant level while the engine is cold. Top up as necessary with premixed coolant. Refer to the instructions on ant to the proper level.

3. Check the engine belts. Refer to the instructions on

page 187 to check belt condition and adjust tension.

4. Check brake lines and hoses.

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

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

page 172 for adding cool-

– 70 – Y53-6007 (R10/06)

7. Check the power steering fluid reservoir; top up as necessary.

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

9. Drain the fuel/water separator.

Checking the Luggage Compartment

1. Check the fire extinguisher charge.

2. Check the road emergency kit. Is it complete?

Checking Outside the Vehicle

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.

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.

page 164.

6. Check emergency flashers and exterior lamps.

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

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.

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

9. Check the air cleaner and exhaust system. Are they tight and secure?

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

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11. Is the trailer spare wheel secure? Inflated?

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

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

14. Is the sliding 5th wheel locked?

15. Check for loose or missing suspension fasteners.

16. Check springs or other suspension parts for damage such as cracks, gouges, distortions, bulges, or chaf ing.

17. Check the air system. Are there leaks?

18. 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 auto matic drain valves.

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

“PART 2: GETTING

INTO & OUT OF THE CAB AND FRAME ACCESS” of this manual for more informa-

tion.

1. Adjust the seats.

2. Fasten and adjust safety restraint belts. See “PAR T 5 :

SEAT AND RESTRAINT SYSTEMS”, or the Index,

under Restraint Systems.

3. Sleeper Restraints: Check and inspect condition. See

“PART 5: SEAT AND RESTRAINT SYSTEMS”, or the

Index, under Restraint Systems.

4. Adjust the steering column.

5. Check mirror adjustment.

6. Operate air-powered devices to circulate lubricants.

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

Superintendent of Documents

U.S. Government Printing Office

Washington, DC 20402

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PART 7: STARTING & OPERATING THE VEHICLE

Since each Model 387 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 in your glove box. It will give you tips on starting, shifting, and driving a truck. Below are instructions for both normaltemperature starting and cold-weather starting.

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.

• If your vehicle is equipped with a digital message center (DMC), the DMC display will come on in the “Clock” mode.

• The multiplex instrumentation system will begin a self-test:

– Gauge pointers will move to a 12:00 position,

with their LED warning lights on, for 5 seconds.

– Gauge pointers will then move to their actual

gauge readings and their LED warning lights will go off.

• The speedometer message center (SMC) will display the odometer.

NOTE: If the SMC displays other messages or if

other alarms activate after the key is turned ON, see the “Warning Alarms” section at the end of this part

page 115.

5. Turn the key to start.

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

NOTE: Some starters are equipped with overcrank

protection. Check the “Engine Operation and Maintenance Manual” for details.

If the 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 2 minutes before trying again. If the engine still won’t start after a couple of tries, check the manual override shut down valve and fuel lines for possible fuel starvation or air leaks. Starting failure may mean fuel isn’t reaching the injectors.

1. 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.

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

3. 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 ser vice 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.

WARNING! Do not use ether or starting fluid in conjunction with flame-start air intake heating systems. Flame-start systems use an open flame inside the manifold to heat the air/fuel mix ture for cold weather starting. If ether is also used with flame-start, the air/fuel will ignite inside the manifold, which could cause an explo sion and severe injury.

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Engine Warmup

The purpose of engine warmup is to allow oil film to be established between pistons and liners, shafts and bear ings 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

WARNING! Do not start or let the engine run in an enclosed, unventilated area. Exhaust fumes from the engine contain carbon monox ide, a colorless and odorless gas. Carbon monoxide can be fatal if inhaled.

2. After a few minutes of idling at 600 RPM, increase your idle speed to 900 or 1000 RPM. Continue your

warmup. This procedure allows oil to warm and flow freely while pistons, liners, shafts, and bearings expand slowly and evenly. In extremely cold tempera tures, you may have to increase idle speed.

NOTE: In colder climates where the temperature is often below freezing, the warmup for turbocharged engines is especially important. Chilled external oil lines leading 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.

(R10/06) Y53-6007 – 75 –

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 or sleeper. 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/sleeper and causes serious illness.

CAUTION: Never idle your vehicle for prolonged periods of time if you sense that exhaust fumes are entering the cab or sleeper. 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.

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 must use a winterfront:

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

• Use only a winterfront available from your Peterbilt dealer that is compatible with a EPA-compliant engine cooling system. These winterfronts are specifically designed for use with new grill snap pat terns.

– 76 – Y53-6007 (R10/06)

NOTES:

• Keep the engine exhaust system and the vehicle’s cab/sleeper ventilation system properly maintained. It is recommended that the vehi cle’s exhaust system and cab/sleeper 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, cab

or sleeper is damaged

• 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.

Transmission Warmup

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 Neutral.

• 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.

Idling the Engine

• 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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Under most circumstances, idling your engine for long periods merely wastes fuel. In severe arctic weather con ditions, 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 opera tion of the engine, even for a short time, may result in serious engine damage or a fire.

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 lubrica tion. 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 allow 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.

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. Unneces sary stress and possible brake malfunction could occur if the vehicle is forced to move before the air system reaches 100 psi (689 kPa).

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Shifting The Transmission

Operating the Clutch

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 correct sequence for your particular transmis sion. 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.

“Riding” the Clutch

The clutch pedal is not a footrest. Driving with your foot on

the clutch pedal will allow your clutch to slip, causing

excessive heat and wear. You can damage your vehicle this way.

Clutch Travel

CAUTION: Always use first gear or a low speed 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 engaged.

(R10/06) Y53-6007 – 79 –

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 excessive 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 unneces sary 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 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 pedal 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 trans-

mission, gradually release the clutch. Then the drive gear

can roll enough to allow the teeth to line up properly and complete the shift.

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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 without 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 trans mission and on your engine, helping your vehicle match engine speed with driveline speed and achieving clashfree 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 tachom eter 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.

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

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.

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SHIFT AT ANY SPEED EXCEPT IF A WHEEL IS SPINNING

03029

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 without tire chains – Dirt roads – Loose sand, mud, or other off-road conditions

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

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 differ

ential locked. Lock the differential only when operating on surfaces with poor trac

tion, 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 will 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.

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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.

03030

Range Selector

Using 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 transmis sion to maintain the road speed you want.

4. When you go from off-highway to highway driving, shift the axle to the HIGH range this way:

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

want the axle to shift.

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d. Then release the accelerator until the axle has

shifted.

e. You are now in the HIGH axle range on the highway.

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

Selector 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.

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

SHIFT AT ANY SPEED EXCEPT IF A WHEEL IS SPINNING

03029

Interaxle In Unlock

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

– 84 – Y53-6007 (R10/06)

SHIFT AT ANY SPEED EXCEPT

IF A WHEEL IS SPINNING

03029

Interaxle In Lock

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

CAUTION: If you shift the axle range with the interaxle differential in LOCK, you could do 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 Transmission

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

WAR NING! 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, see your transmission manufacturer’s manual for its proper operation.

(R10/06) Y53-6007 – 85 –

If Your Vehicle Must Be Towed

2. Cover open hubs when removing drive axle shafts.

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: Failure to lift the driving wheels off the ground or remove the driveline and axle shafts before towing the vehicle could seri ously damage your vehicle. All lubricating and clutch application oil pressure is pro vided by an engine-driven pump, which does not work when the engine is stopped. When vehicles are towed either by wrecker or piggy back, 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.

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 cov ered 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.

CAUTION: To avoid damaging your vehicle shift the axle at slower travel speeds until you are used to driving with a dual range axle.

– 86 – Y53-6007 (R10/06)

a. Remove the air line and firmly cap

Air Line - Remove to Install

Caging Bolt

Caging Bolt Storage Location

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 pis ton into a “lock” position.

CAUTION: Failure to install the caging bolt when towing vehicles with driver-control main differential lock can result in damage by fail

ing 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 sys

tem 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 dif

ferential lock is firmly capped to prevent loss of air pressure from the recovery vehi

cle.

(R10/06) Y53-6007 – 87 –

• 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.

1. Into the pinion cage, add 1 pint (.47 liter) of lubricant, OR Into the inter-axle differential, add 2 pints (.94 liter) of lubricant. See the Index, under Lubricant Specifica tions, for the lubricant required by each axle.

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).

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

Returning a Towed Vehicle to Service

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

– 88 – Y53-6007 (R10/06)

A Model 387 is 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 automatically adjust air pressure to the brake chambers 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 Ser vice 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 normal. 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 acci dent.

• Do not rely on an anti-lock brake system that is functioning improperly. You could lose control of the vehicle resulting 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 antilock brakes. If any warning lamp indicates a problem, have that ABS checked.

ABS Warning Lamps

Truck/Tractor ABS Warning Lamp

A truck/tractor ABS warning lamp illuminates when the ignition switch is first turned on and will remain on until the system self-test has been completed successfully. Nor mally, this ABS lamp will remain on until a speed of no more than 9 mph has been reached and the speed sen sors have been checked for correct output. The lamp should remain off after this point unless a failure in the system is detected.

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.

The truck/tractor ABS lamp is located in the warning lamp cluster. (See illustration on

page 47.).

(R10/06) Y53-6007 – 89 –

ABS

02999A

CAUTION: If the trailer 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.

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

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 PLC Trailer ABS warn ing lamp in the cab (see page 47):

A trailer ABS warning lamp will illuminate for a bulb check when the ignition switch is first 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:

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

ABS

– 90 – Y53-6007 (R10/06)

CAUTION:

• The center pin of the 7-way trailer light line may be constantly powered for ABS. Make sure it will not accidently turn on trailer equipment.

• Do not splice into the non-switchable “Auxiliary” circuit on the primary 7-way trailer light line. Doing so may cause the trailer ABS to malfunction. This circuit is dedi cated for trailer ABS power. To add a switchable “auxiliary” circuit, contact a Kenworth Dealership.

NOTES:

• A “properly connected” ABS-equipped trailer is

– a trailer with PLC hooked up to the J560 con-

nector

– a trailer without PLC that is hooked up to an

optional ISO 3731 connector

• For doubles or triples: PLC does not distinguish between trailers. An ABS problem in any trailer will activate the trailer ABS warning lamp.

2. If an ABS-equipped trailer is properly connected, the trailer ABS warning lamp will remain illuminated for a few more seconds while the trailer ABS is tested.

• If no trailer ABS problems are detected, the lamp will go off.

• If a trailer ABS problem is detected, the lamp will remain on. The driver should have the trailer’s ABS problem corrected before the vehicle is driven with

that trailer attached.

Advanced ABS with Stability Control

This vehicle may be equipped with an optional Electronic Stability Program (ESP). ESP is a feature for ABSequipped vehicles that reduces the risk of rollovers, jack knifing and other loss of control. ESP features include Roll Stability Program (RSP) and Yaw Control.

During operation, the ECU of the Bendix Advanced ABS system constantly compares performance models to the vehicle’s actual movement, using the wheel speed sen sors of the ABS system, as well as lateral, yaw, and steering angle sensors. If the vehicle shows a tendency to leave an appropriate travel path, or if critical threshold val

(R10/06) Y53-6007 – 91 –

ues are approached, the system will intervene to assist the driver.

Roll Stability Program

Bendix RSP, an element of the overall ESP system, addresses rollover conditions. In the case of a potential roll event, the ECU will override the throttle and quickly apply brake pressure at all wheel ends to slow the vehicle combination. The level of braking application during an RSP event will be proportional to roll risk.

A Real World Example Of How The RSP System Operates:

Excessive speed for road conditions creates forces that exceed the threshold at which a vehicle is likely to rollover on a higher-friction surface.

The system automatically reduces engine torque and applies the service brakes (based on the projected rollover risk) to reduce the vehicle speed, thereby reducing the tendency to roll over.

RSP Example

– 92 – Y53-6007 (R10/06)

Yaw Stability

Yaw Control

Yaw stability counteracts the tendency of a vehicle to spin about its vertical axis. During operation, if the friction between the road surface and the tires is not sufficient to oppose lateral (side) forces, one or more of the tires can slide, causing the truck/tractor to spin.

These yaw events are referred to as either “under-steer” (where there is a lack of vehicle response to steering input due to tire slide on the steer axle) or “over-steer” (where the tractor's rear end slides out due to tire slide on the rear axle) situation. Generally, shorter wheelbase vehicles (tractors, for instance) have less natural yaw stability, while longer wheelbase vehicles (straight trucks, for instance) have greater natural yaw stability. Factors that influence yaw stability are: wheelbase, suspension, steer ing geometry, weight distribution front to rear, and vehicle track width.

Yaw Control responds to a wide range of low- to high-friction surface scenarios including rollover, jackknife and loss of control. In the case of vehicle slide (over-steer or understeer situations), the system will reduce the throttle and then brake one or more of the “four corners” of the vehicle (in addition to potentially applying the trailer brakes), thus applying a counter-force to better align the vehicle with an appropriate path of travel. For example, in an over-steer situation, the system applies the “outside” front brake; while in an under-steer condition, the “inside” rear brake is applied.

(R10/06) Y53-6007 – 93 –

IMPORTANT SAFETY INFORMATION ABOUT THE STABILITY SYSTEM

ESP May Reduce The Vehicle Speed Automatically

To minimize unexpected deceleration and reduce the risk of a collision the operator must:

A Real World Example Of How Yaw Control Operates:

Excessive speed exceeds the threshold, creating a situation where a vehicle is likely to spin and jackknife.

• Avoid aggressive driving maneuvers, such as sharp turns or abrupt lane changes at high speeds, which might trigger the stability system.

• Always operate the vehicle safely, drive defensively, anticipate obstacles and pay attention to road, weather and traffic conditions. ABS, ATC and ESP stability systems are no substitute for prudent, careful driving.

Towing Doubles Or Triples May Reduce The Effectiveness Of Stability Systems

ESP is designed and optimized for trucks and for tractors

The Bendix® Yaw Control system reduces engine throttle and selectively applies brakes to reduce the vehicle speed, thereby reducing the tendency to jackknife.

Yaw Control Example

that tow single trailers. If a tractor equipped with ESP is used to power multiple trailer combinations (known as “doubles” or “triples”) the effectiveness of the ESP system may be greatly reduced.

– 94 – Y53-6007 (R10/06)

WAR N ING! Exercise extreme care when towing doubles or triples with a vehicle equipped with Electronic Stability Program. Excessive speed and aggressive maneuvers, such as sharp turns, sudden steering inputs or abrupt lane changes should be avoided because these maneuvers could cause loss of vehicle control possibly resulting in severe personal injury.

• If very rapidly winding steering inputs are inputted at high speeds,

• There are mechanical problems with suspension leveling of the tractor or trailer resulting in uneven loads,

• The vehicle is maneuvering on a high banked road creating either additional side forces due to the weight (mass) of the vehicle or a deviation between expected & actual yaw rates,

Limitations Of Stability Systems

The ESP stability system’s effectiveness may be greatly reduced if:

• The load shifts due to improper retention, accident damage or the inherently mobile nature of some loads (for example, hanging meat, live animals or partially laden tankers),

• The vehicle has an unusually high or off-set center of gravity (CG),

• One side of the vehicle drops off the pavement at an angle that is too large to be counteracted by a reduc tion in speed,

• The vehicle is used to haul double or triple trailer combinations,

(R10/06) Y53-6007 – 95 –

• Gusty winds are strong enough to cause significant side forces on the vehicle and any towed vehicles.

To Maximize The Effectiveness Of ESP:

• Loads must be properly secured and evenly distributed at all times.

• Drivers need to exercise extreme caution at all times, and avoid sharp turns, sudden steering inputs or abrupt lane changes at high speeds, particularly if:

– the vehicle hauls loads that could shift,

– the vehicle or load has a high or off-set center of

gravity (CG) when loaded, or

– the vehicle tows doubles or triples.

Truck Chassis Modifications

The ESP system was specifically calibrated and validated only for your vehicle’s original factory-built configuration. If your vehicle’s chassis components are altered (for exam ple; a wheelbase extension or reduction, tag axle addition or removal, tractor to truck conversion or steering system component change) the ESP system must be disabled immediately by a qualified mechanic.

the steering wheel is changed or re-centered, the Steer ing Angle Sensor must be re-calibrated.

WARNING! If the Steering Angle Sensor is not

re-calibrated, the Yaw Control system will not function properly, which could result in a loss of control of your vehicle.

Wheel Spin Control Warning Lamp

WARNING! Failure to disable ESP “Electronic Stability Program” when modifying a vehicle could result in a loss of vehicle control possi bly resulting in severe personal injury.

WARNING! For vehicles equipped with ESP “Electronic Stability Program” do not replace the vehicle’s steering wheel. Using a different steering wheel could cause ESP to malfunc tion causing a loss of vehicle control possibly

Your truck/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 these features is monitored by a warning lamp located on the main dash.

ATC

resulting in severe personal injury.

Steering Angle Sensor Re-Calibration

Whenever maintenance or repair work is performed to the steering mechanism, linkage, gear, adjustment of the

03034

wheel track, or if the steering angle sensor is replaced or

– 96 – Y53-6007 (R10/06)

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 will 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 sys tem.

Except for checking for proper illumination of the ABS and Wheel Spin Control 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 specific ABS that was provided with your vehicle.

Brake Safety and Emergency

To stop your vehicle in an emergency, vary the service

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, includ ing 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.

(R10/06) Y53-6007 – 97 –

• Unless you have an anti-lock braking sys-

tem, always avoid completely depressing the service brake pedal, if possible, even during emergency braking. Depressing the brake pedal too aggressively can cause the wheels to lock, which can lead to an uncon trolled skid and could cause an accident.

Overheated Brakes

Under normal braking conditions, the energy generated will bring the internal brake drum temperature to about 500° F (260° C). This is well within the safe zone: The maximum safe temperature of linings for drum type brakes is usually about 800° F (427° C).

But if service brakes are used improperly or for prolonged periods, internal brake drum temperatures may commonly exceed 800° F (427° C). Such brake overheating may be detected by a burning smell or smoke coming from a drum. If this occurs, you should immediately stop and check for cracked brake drums or lining fires. If neither exists, get back behind the wheel and resume a slow speed as soon as possible to cool the brakes.

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 put ting 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 oper ating level, the spring brakes will apply automatically, bringing your vehicle to a stop.

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.

– 98 – Y53-6007 (R10/06)

Red / Yellow Controls

02909

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.

• 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.

(R10/06) Y53-6007 – 99 –

NOTE: Today’s diesel electronic engines have significant torque and startability power at low RPM. Combinations of engine speed and avail able 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 pressure and setting the trailer brakes.

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 parked.

• 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 trailer system and release the trailer parking brakes:

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

• Push the red knob in.

• Hold the red knob in by hand until the trailer air pres-

sure builds to a pre-set level, about 45 psi. At this point it will remain in.

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

– 100 – Y53-6007 (R10/06)

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 situa tions, the spring brakes may be manually released to allow the vehicle to be towed. This section 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. Driv ing 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 roll ing before manually releasing the spring brakes.

• Disassembling the spring brake chamber is dangerous and could cause serious injury. These chambers contain a powerful spring that is compressed. Sudden release of this

spring could cause you to be badly injured. Do not disassemble a spring brake cham ber.

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

(R10/06) Y53-6007 – 101 –

To release spring brakes manually

1. Remove the cap from the spring chamber.

2. Remove the release stud assembly from the side pocket; remove the release nut and washer from the release stud.

02936A

02936B

– 102 – Y53-6007 (R10/06)

Peterbilt 387 Operator’s Manual after 1-07 Peterbilt 387 Operator’s Manual after 1-07

Specifications and Main Features

Frequently Asked Questions

User Manual

How To Find What You Want

A Special Word About Repairs

Additional Sources of Information

Warnings

Vehicle Safety

Door Lock and Keys

Remote Keyless Entry (optional)

Operation

Batteries

Synchronization

Climbing Onto the Deck Plate

Hood Tilt

Your Instrument Panel

Typical Cab Instruments and Controls

Steering Column-Mounted Controls

Turn Signal and Indicator Lights

Hazard Flasher

High Beam Headlights

Electric Horn

Air Horn

Trailer Brake Hand Valve

Tilt-Telescoping Steering Column

Dash-Mounted Features

Keys and Locks

Ignition Switch

Headlights

Panel Light Knob

ID and Clearance Lights Switches

Fog/ Driving Lights Switch

Dome Light Switch

Windshield Wipers and Washers

Wiper

Washer

Intermittent Windshield Wiper Control

Air Suspension Deflate Switch (Dump Valve)

Engine Fan Switch

Mirror Heat Switch

Power Mirror Switch

Cruise Control Switch

Engine Brake

Two-Speed Rear Axle (Range) Switch

Interaxle Differential Lock Switch

Fifth Wheel Lock (Slider Adjustment) Switch

Parking Brake Valve and Trailer Air Supply Valve

Heater-Air Conditioning Controls

To Set the Heater-Air Conditioning Controls

Cigarette Lighter

Ashtray

Glove Compartment

Gauges

Speedometer-Message Center (SMC)

Tachometer

Air Application Gauge

Primary And Secondary Air Pressure Gauges (Air Reservoir)

Engine Oil Pressure Gauge

Water Temperature Gauge

Engine Overheating

Fuel Gauge

Warning Lights and Buzzers

Emission System Lamps

Transmission Temperature Gauge

Front Drive Axle or Rear Drive Axle Temperature Gauge

Manifold Pressure Gauge

Pyrometer

Voltmeter

Air Filter Restriction Indicator Gauge

Shift Pattern Display

Mirrors

Luggage Compartment(s)

Appliances in the Cab

Refrigerator

Seat

Seat Belts And Their Proper Use

Shoulder Belt

Comfort Feature

Sleeper Bunk Restraints