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

a. Check electrical harnesses for burnt or a. Wiring is burnt, frayed, split or

Annual

Engine

frayed wires, corrosion, loose or broken

missing.

Electrical

connections. If connections are loose,

Components

tighten. If corrosion is present, clean.

b. Inspect, clean, and tighten cylinder head

grounding stud located at left rear of

engine. Coat with petrolatum (Item 48, WP

0165 00).

CYLINDER HEAD

GROUNDING STUD

a. Check operation of capacitor start relay in

Annual

Starting Aid

battery box by first placing battery discon-

Relay and

nect switch in ON position, then turning

Capacitor

ignition switch to ON and OFF position. A

clicking sound should be heard from relay

each time ignition switch is turned ON. If

no sound is present, perform troubleshoot-

ing (WP 0005 00).

b. Using a multimeter, check charge condi-

tion of capacitor. Voltage should be 24Vdc

or greater. If voltage is not correct, perform

troubleshooting (WP 0005 00).

Annual

Aftercooler

Perform visual inspection of aftercooler

Core

(Group 020 Commercial Service Manuals).

0009 00-24