TM-9-2320-272-24-4

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4

JUNE 1998

TM-9-2320-272-24-4 - Page 204 of 836

TM 9-2320-272-24-4

5-29. CRANKSHAFT AND GEAR MAINTENANCE (Contd)

7.

Remove six upper main bearings (5) and thrust bearing (6) from engine block (4). Discard

bearings (5) and (6).

NOTE

Perform step 8 for late model engines, serial number 44487830

and after.

8.

Remove twelve piston cooling nozzles (7) from engine block (4).

9.

Remove six piston cooling nozzles (7) from engine block (4).

c. Disassembly

NOTE

Before removing crankshaft gear from crankshaft, perform

subtask d of this procedure. If, as a result of inspection, the

crankshaft gear must be removed, perform steps 1 and 2.

1.

Using gear puller, remove crankshaft gear (3) from crankshaft (1).

2.

Remove dowel pin (2) from crankshaft (1). Discard dowel pin (2).

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