Peterbilt Medium Duty Trucks Operator's Manual after 1-07

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Transmission and Clutch As the clutch pedal is depressed further, with harder pressure, the release yoke moves the release bearing away from the engine. This causes the clutch plate to release from the driven disks in the clutch. This is called release travel. And finally, on 9-, 10-, and 11-speed transmissions, as the pedal is pushed to the last 1/2 to 1 inch of travel, the release bearing contacts and engages the clutch brake. This is called clutch brake squeeze. When the clutch wears, the release bearing gradually moves toward the engine, decreasing free pedal and free travel. When all free pedal and free travel are gone, the clutch requires adjustment. The clutch is adjusted by turning an adjustment ring that is built into the clutch. When the ring is turned, the release bearing moves back toward the transmission, restoring free pedal and clutch free travel. Under normal clutch wear this is the only adjustment needed. Do not attempt to change any other component. See the Medium Duty Maintenance Manual for details. Clutch Adjustment — Normal Wear Preventive Maintenance Clutch pedal free travel is usually 1 3/4 in. to 2 in. (34 to 51 mm). This should be your guide for determining whether your truck needs clutch adjustment. Also, if it becomes increasingly difficult to shift into gears, or the truck creeps with the clutch pedal depressed, your clutch needs adjustment. See the Medium Duty Maintenance Manual for the proper adjustment procedures. Some vehicles have automatic clutch adjustment. If yours doesn't have this feature, adjustment will have to be done by a trained certified mechanic. Have the adjustment done before clutch pedal free travel is reduced to the minimum allowable 1/2 in. (13mm). Clutch Linkage The Medium Duty is equipped with a rod and lever mechanical clutch linkage. Lubricate each pivot point on the clutch linkage. – 204 – Y53-6008 Medium Duty (R10/06)
Preventive Maintenance Automatic Transmissions Service Intervals Check daily with engine idling. See Table 2, “Recommended Maintenance Intervals,” Page 120 for service intervals. Automatic Transmission Oil Level Transmission and Clutch NOTE: The vehicle must be parked on level ground. Maintain the oil level and check it daily. Oil should be up to the “HOT” mark on the dipstick when (1) the engine is running, (2) the transmission is at operating temperature, and (3) the transmission is in Neutral. See the Transmission Operator's Manual in the glove compartment for more information on checking the transmission oil level. Table 11 Transmission Lubrication — Automatic transmissions MODEL RECOMMENDED LUBRICANTS AMBIENT TEMPERATURE RANGE DEG. C DEG. F VISCOSITY (SAE) ALLISON TranSynd (Castrol) Above -23 Above -10 10W Medium Duty (R10/06) Y53-6008 – 205 –
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O PERAT O R’S M ANUAL Medium Duty
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Introduction INTRODUCTION How to Us
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Introduction Vehicle Safety Make su
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Introduction Medium Duty Body Build
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Operating Instructions Start-Up OPE
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Operating Instructions NOTE: Any al
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Operating Instructions After loweri
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Operating Instructions GAWR: is the
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Operating Instructions 1. Lights—
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Operating Instructions Start-Up 5 6
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Operating Instructions Instruments
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Operating Instructions Coolant (Wat
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Operating Instructions WARNING! If
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Operating Instructions Voltmeter (o
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Operating Instructions WARNING! Do
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Operating Instructions (2) Trailer
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Operating Instructions aware of a r
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Operating Instructions Defogging CA
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Operating Instructions Radio ACCESS
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Operating Instructions Introduction
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Operating Instructions Seats • Be
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Operating Instructions Tether Adjus
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Operating Instructions Seats If any
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Operating Instructions Emergency Fl
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Operating Instructions Power Mirror
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Operating Instructions Starting Pro
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Operating Instructions Starting Pro
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Operating Instructions After the en
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Operating Instructions OPERATING TH
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Operating Instructions If you have
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Operating Instructions Release Bear
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Operating Instructions Brake Operat
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Operating Instructions (2) Trailer
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Operating Instructions Using the Br
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Operating Instructions Front Brakes
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Operating Instructions To prevent d
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Operating Instructions • If a tra
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Operating Instructions On tractors
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Operating Instructions Compressed A
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Operating Instructions ders which a
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Operating Instructions OPERATING TH
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Operating Instructions going down s
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Operating Instructions countershaft
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Operating Instructions Driving Tips
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Operating Instructions Driving Tips
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Operating Instructions Driving with
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Operating Instructions Fifth Wheel
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Operating Instructions Vehicle Reco
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Operating Instructions Vehicle Reco
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Operating Instructions Introduction
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Preventive Maintenance • When wor
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Preventive Maintenance MAINTENANCE
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Preventive Maintenance Maintenance
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Preventive Maintenance Lubrication
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Preventive Maintenance ENGINE MAINT
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Preventive Maintenance NOTE: To exp
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Preventive Maintenance To Check the
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Preventive Maintenance Engine Cooli
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Preventive Maintenance 8. Idle the
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Preventive Maintenance BRAKE SYSTEM
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Preventive Maintenance • Do not u
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Page 201 and 202: Preventive Maintenance Cab Maintena
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Page 205: Preventive Maintenance Transmission
Page 209 and 210: Preventive Maintenance Steering and
Page 211 and 212: Preventive Maintenance Front Axle a
Page 213 and 214: Preventive Maintenance Torque CAUTI
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Page 219 and 220: Preventive Maintenance Grade 8 Caps
Page 221 and 222: Preventive Maintenance Fifth Wheel
Page 223 and 224: Preventive Maintenance Engine • R
Page 225 and 226: Preventive Maintenance Transmission
Page 227 and 228: Preventive Maintenance Noise and Em
Page 229 and 230: Preventive Maintenance Vehicle Iden
Page 231 and 232: Preventive Maintenance Consumer Inf
Page 233 and 234: Preventive Maintenance Federal Safe
Page 235 and 236: Index fan drive 222 operating the c
Page 237 and 238: Lubrication 150, 210 axle 209 brake
Page 239 and 240: Turbocharger 114, 166 Turn signal/h
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Peterbilt Medium Duty Trucks Operator's Manual after 1-07

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