Peterbilt Car 388 Vacuum

WARNING!: Do not attempt to modify, alter, repair or disconnect any component of the air system.

WARNING!: Prior to the removal of any air system component, always block and hold the vehicle by a secure means other than the vehicle's own brakes.

WARNING!: After completing any repairs to the air system, always test for air leaks, and check the brakes for safe operation before putting the vehicle in service.

WARNING!: Never connect or disconnect a hose or line containing air pressure.

WARNING!: Never exceed recommended air pressure and always wear safety glasses when working with air pressure.

WARNING!: Never attempt to disassemble a component until you have read and understood recommended procedures.

WARNING!: Completely bypassing a Bendix® AD-IS air dryer will bypass the system’s pressure protection valves.

The operation of the vehicle’s braking system and many vehicle accessories depends upon the storage and application of a high-pressure air supply.

Frame Fifth Wheel: Check the kingpin lock and plate for wear and function

Front Suspension Spring Pins: Check for proper function

Front Suspension U-bolts (OFF HIGHWAY): Check the general condition and the tightness of the nuts

Drum Brakes (All) Slack adjusters: Check the push rod travel and check the control arm for cracks

Drum Brakes (All) Brake air system: Check air lines and fittings for leaks

Hub, Drum, and Hubcap Hubcaps: Clean the sight window. Check the center plug, mounting flange, and fill plug for leaks and for proper installation

Main and auxiliary transmission Main and auxiliary transmission and transfer case: Inspect for visible damage, signs of overheating, and leaks

Auxiliary transmission Cotta Transfer Case TR2205: Inspect: Check oil level; inspect for leaks and any visible damage

Tires and Wheels Tires: Inspect for cuts, irregular wear, missing lugs, sidewall damage, etc

Refer to specific manufacturer's literature for any special instructions.

Check lock guard operation using a commercial lock tester.

Clean and oil all moving parts.

Lubricate the lock mechanism with a lithium-base grease.

All grease fittings (especially those which grease the top surface of the fifth wheel).

Every 60,000 miles or 6 months:

Refer to specific manufacturer's literature for any special instructions.

Check frame fasteners for tightness; tighten to the specified torque value as required.

Inspect frame crossmembers and mounting brackets for cracks and loose fasteners. Replace or tighten to the specified torque value as required.

Check and adjust front axle (Meritor) total vehicle alignment as required.

Inspect front axle (Meritor) steering knuckle spindles, thrust bearings, kingpins, drawkeys, tie rod ends, steering stops, and bushings for wear and damage and endplay. Shim or replace as required.

Visually check the steering gear and components.

Check for the following possible causes if the steering feels unbalanced from side-to-side while turning: unequal tire pressures, vehicle overloaded or unevenly distributed load, wheels out of alignment, wheel bearings improperly adjusted.

Visually check the following parts: Crosstube, Draglink tube clamp, Ball joints and steering U-joints, Steering wheel for excessive free-play.

Check and adjust front axle (Dana) total vehicle alignment as required.

Lubricate front axle (Dana) kingpin bushings, thrust bearings, and tie rod ball ends (ON HIGHWAY) with approved grease.

Front Axle (Meritor) Drawkeys: Tighten nuts

Front Suspension Spring Pins: Lubricate with approved grease.

Front Suspension U-bolts (OFF HIGHWAY): Check the general condition and the tightness of the nuts.

Drum Brakes (All) Brake treadle valve: Clean the area around the treadle, boot, and mounting plate.

Drum Brakes (All) Brake lining: Inspect; replace as required.

Hub, Drum, and Hubcap Hubs (non-LMS): Check the bearing endplay and adjust as required.

Hub, Drum, and Hubcap Hub seals (all): Check for leaks; replace as required.

Hub, Drum, and Hubcap Brake drums: Inspect for visible cracks, heat checking, galling or scoring of the braking surface, and for severe corrosion on the outside surface.

Main and auxiliary transmission Main and auxiliary transmission and transfer case: Check the drain plugs for tightness.