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 198 of 836

TM 9-2320-272-24-4

5-28. CYLINDER LINERS AND BLOCK MAINTENANCE (Contd)

e. Engine Block Assembly

CAUTION

Ensure all engine block oil passages are free of obstructions.

Failure to do so may result in damage to engine.

NOTE

• Perform step 1 for late model engines, serial

number 44487830 and after.

• Perform step 2 if dowel pins were removed.

1.

Install twelve piston cooling nozzles (7) in engine block (2).

2.

Install two new dowel pins (3) in engine block (2).

3.

Install six piston cooling nozzles (7) in engine block (2).

NOTE

• Apply adhesive sealant to mating surfaces of all expansion

plugs before installation.

• Wrap male pipe threads with antiseize tape before installation.

4.

Install new expansion plug (4) in engine block (2).

5.

Install new expansion plugs (6) and (1) on engine block (2).

6.

Install three pipe plugs (5) on engine block (2). Tighten pipe plugs (5) 6 lb-ft (8 N•m).

NOTE

Perform step 7 if dowel pins were removed.

7.

Install four new dowel pins (8) on engine block (2).

8.

Install new expansion plug (13) on engine block (2).

9.

Install new expansion plug (12) on engine block (2).

10.

Install new expansion plug (11) on engine block (2).

11.

Install pipe plugs (10) and (14) on engine block (2). Tighten pipe plug (14) 6 lb-ft (8 N•m). Tighten

pipe plug (10) 27 lb-ft (37 N•m).

12.

Install new expansion plug (9) on engine block (2).

13.

Install new drainvalve (15) on engine block (2).

14.

Install two new expansion plugs (16) on engine block (2).

15.

Install three new expansion plugs (17) on engine block (2).

16.

Install new expansion plug (18) on engine block (2).

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