TM-9-2320-272-23-3

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

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 3 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-3 - Page 1019 of 1469

CLEANING AND INSPECTION

WARNING

Solvent cleaning compound is flammable and will not be used near an open flame. A fire

extinguisher will be kept nearby when solvent is used. Use only in well-ventilated places.

Failure to comply may result in damage to equipment, injury, or death to personnel.

1.

Clean gasket or sealant remains from mating surfaces of axle shaft and hub.

NOTE

Do not use compressed air to dry bearings.

2.

Clean all hub and drum components in cleaning compound and allow to air-dry.

3.

Inspect hub for cracks and breaks. Replace hub if cracked or broken.

4.

Inspect inner bearing and outer bearing (TM 9-214). Replace if damaged.

5.

Inspect inner bearing cup and outer bearing cup (TM 9-214). Replace if damaged.

NOTE

Perform Steps (6) and (7) only if bearing, bearing cups, or hub are to be replaced.

6.

Remove bearing cups from hub by tapping alternately on outer edge.

7.

Press inner bearing cup and outer bearing cup into hub. Ensure bearing cups are seated.

8.

Inspect drum for deep grooves. Replace drum if grooves are deeper than 1/32 in. (0.79 mm).

END OF TASK

INSTALLATION

1.

Install dust shield (Figure 4, Item 2) on inside of drum (Figure 4, Item 1) with five washers (Figure 4, Item 3)

and screws (Figure 4, Item 4).

TM 9-2320-272-23-3

0480

0480-4