MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company

Vehicle Recovery and Spring Brakes
6. With a wrench, turn the
release stud assembly nut until
the compression spring is 90–95
percent caged. While doing this,
check to make sure the push rod
(adapter push rod or service
push rod) is retracting. Do not
over-torque the release stud assembly. (S–Cam type
maximum: 50 ft-lb, Wedge type maximum: 30 ft-lb.) The
spring brake is now mechanically released.
Freeing the Vehicle from Sand,
Mud, Snow and Ice
WARNING! Do not spin the wheels faster
than 35 mph (55 km/h). Spinning a tire at
speedometer readings above this can be
dangerous—tires can explode from spinning
too fast. Under some conditions, a tire may
be spinning at a speed twice that shown on
the speedometer. Any resulting tire explosion
could cause severe injury or death to a
bystander or passenger, as well as extensive
vehicle damage: including tire, transmission
and/or rear axle malfunction.
Operating Instructions
If the vehicle gets stuck in sand, mud, snow, or ice:
• Move the gearshift lever or selector from First to
Reverse.
• Apply light pressure on the accelerator pedal while the
transmission is in gear.
• Remove your foot from the accelerator while shifting.
• Do not race the engine.
• For best traction and safety, avoid spinning the wheels.
Comply with the following instructions to avoid transmission
damage:
• Always start the vehicle in motion with the shift lever in
first gear.
• Be sure that the transmission is fully engaged in gear
before releasing the clutch pedal (manual only).
• Do not shift into reverse while the vehicle is moving.
• Do not permit the vehicle to be towed for long distances
without removing the driveshaft.
Tire Chains
If you need tire chains, install them on both sides of the driving
axle.
– 112 – PB1318 3/01 Model 330