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

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CLEANING, INSPECTION, AND REPAIR
1.
Clean track (Figure 4, Item 1) and inspect for cracks and chipped or nicked wheel surface. Discard if cracked.
Use file to smooth wheel surface if chipped or nicked.
2.
Clean poppet (Figure 4, Item 8) and inspect for cracks, bends, and damaged threads. Discard if cracked, bent,
or threads are damaged.
3.
Clean spring (Figure 4, Item 7) and inspect for broken or collapsed coils. Discard if coils are broken or collapsed.
4.
Clean nut (Figure 4, Item 9) and inspect for damaged threads. Discard if threads are damaged.
5.
Clean latch (Figure 4, Item 6) and inspect for cracks. Discard if cracked.
6.
Clean nuts (Figure 4, Item 5) and inspect for damaged threads. Discard if threads are damaged.
7.
Clean stopscrews (Figure 4, Item 2) and nuts (Figure 4, Items 3 and 4) and inspect for bends, cracks, or
damaged threads. Discard if bent, cracked, or threads are damaged.
8.
Clean wheel (Figure 4, Item 10) and inspect for cracks and damaged roller surface. Discard if cracked or roller
surface is damaged.
9.
Inspect bearing (Figure 4, Item 11) for chips, cracks, and damaged cage. Discard if chipped, cracked, or cage
is damaged.
10.
Clean thrust washer (Figure 4, Item 12) and inspect for cracks and wear. Measure thickness. Discard if cracked
or thickness is less than 0.058 in. (1.47 mm).
11.
Clean axle (Figure 4, Item 13) and inspect for cracks and scoring. Discard if cracked or scored.
12.
Clean screw (Figure 4, Item 18) and inspect for cracks, scoring, and damaged threads. Discard if cracked,
scored, or threads are damaged.
13.
Clean two thrust washers (Figure 4, Item 14) and inspect for cracks and wear. Measure thickness. Discard if
cracked or thickness is less than 0.058 in. (1.47 mm).
14.
Clean sheave (Figure 4, Item 17) and inspect for cracks. Discard if cracked.
15.
Clean sleeve (Figure 4, Item 16) and inspect for cracks and scoring. Discard if cracked or scored.
16.
Inspect bearing (Figure 4, Item 15) for chips, cracks, and damaged cage. Discard if chipped, cracked, or cage
is damaged.
TM 9-2320-272-23-4
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