AIR BRAKE SYSTEM -680640075

TM 5-2420-224-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

NOTE: Within designated interval, these checks are to be performed in the order listed.

INTERVAL DEFINITIONS

Q-Quarterly

S-Semiannually

A-Annually

Interval

Item

Item to be Inspected:

No.

Procedure: Check for and have repaired, filled, or adjusted as needed.

WHEELS AND TIRES (CONT)

b. Check lug nuts for proper torque of 260 Ib-ft (350 N.m).

●

AIR BRAKE SYSTEM

●

Check brake system components for leaks and damage. Check all brake

hoses for wear, pinching, or interference. If any of these conditions are

found, replace or reposition hose. Replacement is mandatory for any

hose worn or chafed before vehicle use. Replacement is mandatory for

any hose that is leaking or has bulges.

TRANSMISSION

●

Check transmission for leaks, loose bolts, and obvious damage.

FRONT AXLE

●

Check for loose screws and missing or damaged mounting hardware.

REAR AXLES

●

Check for loose screws and missing or damaged mounting hardware.

SUSPENSION

●

a. Check coil springs for cracks or breaks.

●

b. Check torque of coil spring mounting bolts. Torque should be

103 Ib-ft (140 N.m).

●

Change oil and filter in front suspension lockout system (HMMH).

FRAME AND CROSSMEMBERS

●

a. Inspect frame and side rails for cracks, breaks, bends, wear,

deterioration, and loose bolts.

Change 1

2-7