Table 1. Unit Preventive Maintenance Checks and Services (PMCS) for the M878A2 Yard Tractor cont'd

TM 9-2320-312-24-1

Table 1. Unit Preventive Maintenance Checks and Services (PMCS)

for the M878A2 Yard Tractor - Continued.

LOCATION

EQUIPMENT NOT

ITEM TO

ITEM

READY/AVAILABLE

CHECK/

NO.

INTERVAL

PROCEDURES

IF:

SERVICE

Semiannual

Cooling

System

WARNING

DO NOT remove radiator cap unless engine has cooled to at least 120F

(50C) as indicated on coolant temperature gauge. This is a pressurized

cooling system and escaping steam or hot coolant will cause serious burns.

Wear effective eye, glove, and skin protection when handling coolants.

Failure to do so may cause injury.

NOTE

Refer to Group 020 Commercial Service Manuals for cooling system ser-

vice information.

a. Test cooling system to ensure adequate

freeze protection.

b. Verify coolant contains no traces of trans-

mission fluid, which would indicate a

faulty oil cooler.

c. Inspect radiator and charge air cooler for c. Class III leaks are evident.

leaks, bent or broken fins, loose mounting,

corrosion, and protruding objects.

d. Inspect radiator hoses for cracks, bulges or

soft spots. Ensure that hose clamps are

tight.

e. Inspect radiator cap, gaskets, and rubber e. Fan shroud is cracked. Class

isolator mounts and fan shroud for cracks

III leaks are evident.

and leaks.

f. Replace coolant filter element (WP 0024

g. Inspect fan for cracks or looseness. Notify g. Fan is cracked, broken or

Direct Support maintenance if cracked or

loose.