Medium Duty Operator's Manual - Peterbilt Motors Company
Medium Duty Operator's Manual - Peterbilt Motors Company Medium Duty Operator's Manual - Peterbilt Motors Company
Rear Axle and Suspension Preventive Maintenance 1 3 Rear Suspension Fasteners Continual road shock and load stresses may force the rear axles out of alignment. If you detect rapid tire wear on the rear axles, you may have misaligned axles. Have your rear axle alignment checked and adjusted by a Peterbilt Dealer or Authorized Service Center. Rear Axle Filler and Drain Holes and Breather Vent Axle Housing Breather Vent • Check and clean the axle housing breather vent (3) at each oil level check. 2 0446A Every 5,000 miles (8000 km) or 180 days, whichever occurs first and thereafter, retorque all suspension fasteners to recommended specifications. See the Fastener Torque Table for proper torque specifications. Load the vehicle to its normal gross weight before tightening U-bolts. Loading the vehicle ensures proper adjustment of the U-bolt and spring assembly. U–bolts are difficult to tighten unless you have the right equipment. If you cannot tighten them correctly yourself, be sure to have them checked and tightened regularly by an authorized mechanic. – 246 – Y53-6008A Medium Duty (R05/09)
Preventive Maintenance WARNING! Do not replace U–bolts and nuts with common U–bolts or standard nuts. These parts are critical to vehicle safety. If the wrong U–bolts or nuts are used, the axle could loosen or separate from the vehicle and cause a serious injury accident. Use only U–bolts and nuts of SAE Grade 8 specification or better. WARNING! Do not operate the vehicle if the U– bolts are not properly tightened. Loose U–bolts do not properly secure the axle to the suspension. This could cause loss of vehicle control and an injury accident. Loose U–bolts can also cause uneven tire wear and poor alignment. Suspension alignment should be checked when any one of the following conditions exist: • Discovery of loose suspension fasteners (Any torque below the recommended torque value.). • Discovery of elongated holes in a suspension component. • Bushing replacement. • Excessive or abnormal tire wear. NOTE: To ensure an accurate torque reading, use properly maintained and calibrated torque wrenches. Rear Axle and Suspension Grade 5 Capscrew Torque Specifications Capscrew Body Torque Size (inches-thread) Lb. ft. N.m. 1/4-20 6—9 8—12 -28 7—10 9.5—14 5/16-18 13—18 18—24 -24 14—20 19—27 3/8-16 22—32 30—43 -24 25—40 34—54 7/16-14 35—50 47—68 -20 39—56 53—76 1/2-13 54—77 73—104 -20 58—87 79—118 9/16-12 78—111 105—151 -18 87—124 118—168 5/8-11 108—154 147—209 -18 122—174 166—236 3/4-10 192—273 260—370 -16 214—305 290—414 7/8-9 309—441 419—598 -14 341—486 462—659 1 -8 464—662 629—898 1-12 508—724 689—982 Medium Duty (R05/09) Y53-6008A – 247 –
- Page 196 and 197: Air System CAUTION: When draining t
- Page 198 and 199: Air System High Frequency Vibration
- Page 200 and 201: Tires and Wheels Introduction TIRES
- Page 202 and 203: Tires and Wheels Tire Inflation Mos
- Page 204 and 205: Tires and Wheels Wheel Mounting and
- Page 206 and 207: Tires and Wheels Preventive Mainten
- Page 208 and 209: Tires and Wheels Preventive Mainten
- Page 210 and 211: Tires and Wheels Wheel and Tire Rep
- Page 212 and 213: Heater and Air Conditioner CAUTION:
- Page 214 and 215: Electrical System All the electrica
- Page 216 and 217: Electrical System Overcharge: this
- Page 218 and 219: Electrical System before proceeding
- Page 220 and 221: Electrical System • When fast cha
- Page 222 and 223: Electrical System Electrical and Al
- Page 224 and 225: Cab Maintenance Cleaning, Protectio
- Page 226 and 227: Cab Maintenance At least every spri
- Page 228 and 229: Cab Maintenance • Remove soap wit
- Page 230 and 231: Cab Maintenance Preventive Maintena
- Page 232 and 233: Cab Maintenance Preventive Maintena
- Page 234 and 235: Transmission and Clutch Preventive
- Page 236 and 237: Transmission and Clutch Automatic T
- Page 238 and 239: Steering and Driveline Preventive M
- Page 240 and 241: Front Axle and Suspension Preventiv
- Page 242 and 243: Front Axle and Suspension Torque CA
- Page 244 and 245: Rear Axle and Suspension It is impo
- Page 248 and 249: Rear Axle and Suspension Grade 8 Ca
- Page 250 and 251: Frame and Fifth Wheel Fifth Wheel M
- Page 252 and 253: Noise and Emission Control Engine
- Page 254 and 255: Noise and Emission Control Transmis
- Page 256 and 257: Noise and Emission Control Preventi
- Page 258 and 259: Consumer Information and Vehicle Id
- Page 260 and 261: Consumer Information and Vehicle Id
- Page 262 and 263: Consumer Information and Vehicle Id
- Page 264 and 265: INDEX INDEX A Accessories 70 Air co
- Page 266 and 267: INDEX Cooling system conventional c
- Page 268 and 269: INDEX G Gauges and Displays 35 Driv
- Page 270 and 271: INDEX use 62, 88, 97, 121, 143, 146
- Page 272 and 273: INDEX U U-Bolt torque 242 Underbody
- Page 274: Y53-6008A 06/09 Printed in the U.S.
Rear Axle and Suspension<br />
Preventive Maintenance<br />
1<br />
3<br />
Rear Suspension Fasteners<br />
Continual road shock and load stresses may force the rear<br />
axles out of alignment. If you detect rapid tire wear on the<br />
rear axles, you may have misaligned axles. Have your rear<br />
axle alignment checked and adjusted by a <strong>Peterbilt</strong> Dealer or<br />
Authorized Service Center.<br />
Rear Axle Filler and Drain Holes and Breather Vent<br />
Axle Housing Breather Vent<br />
• Check and clean the axle housing breather vent (3) at<br />
each oil level check.<br />
2<br />
0446A<br />
Every 5,000 miles (8000 km) or 180 days, whichever occurs<br />
first and thereafter, retorque all suspension fasteners to recommended<br />
specifications. See the Fastener Torque Table for<br />
proper torque specifications.<br />
Load the vehicle to its normal gross weight before tightening<br />
U-bolts. Loading the vehicle ensures proper adjustment of<br />
the U-bolt and spring assembly.<br />
U–bolts are difficult to tighten unless you have the right<br />
equipment. If you cannot tighten them correctly yourself, be<br />
sure to have them checked and tightened regularly by an<br />
authorized mechanic.<br />
– 246 – Y53-6008A <strong>Medium</strong> <strong>Duty</strong> (R05/09)