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

NOTE

Semiannual

Rear Axle

Assembly

Refer to Group 090 Commercial Service Manuals for instructions on per-

forming the following maintenance.

Rear axle assembly refill capacity is 41 pt (19.4 L).

a. While axle is still warm, drain oil from hub

wheel ends and from differential.

b. Perform scheduled Routine Maintenance

as indicated in Section A, page A3 of the

Commercial Service Manual.

c. Remove and disassemble planet carrier

unit and hub/annulus units. Perform a thor-

ough inspection of all removed compo-

nents.

d. Inspect brake assembly components, to

include brakeshoe lining thickness.

Remove and repair components as

required.

e. Reassemble and install all removed com-

ponents. Adjust wheel bearings (hub end

float).

f. Refill hub wheel ends and differential with

gear lubricating oil (Item 38, 39 or 40, WP

0165 00).

Semiannual

Rear Brakes

Check brake adjustment at rear axle. Adjust

brakes as required (Group 090 Commercial

Service Manuals).

a. Inspect fifth wheel air cylinder and hose

Semiannual

Fifth Wheel

for looseness or damage. Replace any

Air Cylinder

damaged component (WP 0083 00).

and Hose

b. With engine running and air system fully b. Any leaks are evident.

pressurized, operate fifth wheel lock and

check for air leaks.

0009 00-22