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 597 of 1417

DISASSEMBLY

1.

Install oil filter head (Figure 2, Item 3) in soft-jawed vise (Figure 2, Item 12).

WARNING

Pressure regulator is under spring tension. Use care when removing plug. Failure to comply

may result in injury or death to personnel.

2.

Remove plug (Figure 2, Item 7), washer (Figure 2, Item 6), spring (Figure 2, Item 8), and pressure regulator

plunger (Figure 2, Item 9) from port (Figure 2, Item 10) and bore (Figure 2, Item 11). Discard washer.

3.

Remove oil filter adapter (Figure 2, Item 1) from oil filter head (Figure 2, Item 3).

4.

Remove plugs (Figure 2, Items 2 and 4) from oil filter head (Figure 2, Item 3).

CAUTION

When removing bypass valve, be careful not to score oil filter head. Failure to do so may

result in damage to engine.

5.

Using screwdriver, position blade of screwdriver behind bypass valve (Figure 2, Item 5) and pry bypass valve

out of oil filter head (Figure 2, Item 3). Discard bypass valve.

6.

Remove filter head (Figure 2, Item 3) from soft-jawed vise (Figure 2, Item 12).

TM 9-2320-272-23-2

0229

0229-4