TM-9-2320-272-23-4

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 4 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-4 - Page 435 of 1393

CLEANING, INSPECTION, AND REPAIR

1.

For General Cleaning Instructions, refer to (Volume 5, WP

0819).

2.

For General Inspection Instructions, refer to (Volume 5, WP

0819).

3.

Remove five keys (Figure 5, Item 2) and bushings (Figure 5, Item 1) from sprockets (Figure 5, Item 3).

Discard

keys.

4.

Inspect bushings (Figure 5, Items 1, 6, and 7) for wear and damage. If worn or damaged, replace bushings.

5.

Inspect ratchet shaft (Figure 5, Item 4) for burrs, nicks, and corrosion. If damaged, repair with file or emery

cloth. If damage is excessive, replace.

6.

Test spring action of lock plunger (Figure 5, Item 5). If spring action is weak, replace lock.

7.

Install five keys (Figure 5, Item 2) and bushings (Figure 5, Item 1) on sprockets (Figure 5, Item 3).

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