TM-9-2320-272-23-2

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

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-2 - Page 541 of 1417

INSTALLATION

NOTE

Perform Step (1) if dowel pins were removed.

1.

Install new dowel pins (Figure 2, Item 2) on engine block (Figure 2, Item 1).

2.

Install new seal (Figure 2, Item 3) on rear cover (Figure 2, Item 11).

3.

Apply gasket sealant to threads of 12 screws (Figure 2, Item 5) and mating surfaces of flywheel housing

(Figure

2,

Item

4) and engine block (Figure 2, Item 1).

4.

Position flywheel housing (Figure 2, Item 4) on engine block (Figure 2, Item 1). Ensure flywheel housing is

properly aligned on dowel pins (Figure 2, Item 2) and gasket (Figure 2, Item 4) is not damaged.

5.

Install flywheel housing (Figure 2, Item 4) on engine block (Figure 1, Item 1) with 12 screws (Figure 2, Item 5).

Tighten screws to 45 lb-ft (61 N·m) in sequence shown in Figure 3.

6.

Lubricate eight screws (Figure 2, Item 9) with clean engine oil.

CAUTION

Do not use timing pin to prevent engine from turning. Doing so may cause damage to timing

pin.

7.

Install crankshaft adapter (Figure 2, Item 6), flexplate (Figure 2, Item 7), and clamping ring (Figure 2, Item 8)

on crankshaft (Figure 2, Item 10) with eight screws (Figure 2, Item 9). Tighten screws to 100 lb-ft (136 N·m) in

sequence shown in Figure 3.

TM 9-2320-272-23-2

0221

0221-4