TM-9-2320-280-20-2

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3

JANUARY 1996

TM-9-2320-280-20-2 - Page 125 of 951

3-56. LEFT EXHAUST MANIFOLD REPLACEMENT (Cont’d)

FOLLOW-ON TASKS: • Install 200 ampere alternator (para. 4-109 or 4-110).

• Install 100 ampere alternator (para. 12-23 or 12-24).

• Install 60 ampere alternator (para. 4-2).

• Install oil dipstick tube (para. 3-2).

• Install engine access cover (para. 10-15).

TM 9-2320-280-20-2

Change 3

3-103

CAUTION

Alternate screw and stud tightening. Flanges often break when

each screw is tightened completely before others are snugged up.

NOTE

Ensure replacement gasket has a silver, shiny surface, not a dull,

dark surface, which is characteristic of a gasket containing

asbestos.

1.

Install gasket (5) and exhaust manifold (4) on cylinder head (6) with seven washers (13), socket-

head screws (12), washer (3), and stud (2).

2.

Using hex-head driver, tighten seven socket-head screws (12) and stud (2) to 25-33 lb-ft (34-45 N

.

m).

3.

Install alternator support bracket (1) on exhaust manifold (4) and stud (2) with washer (15) and

locknut (14). Tighten locknut (14) to 31-39 lb-ft (42-53 N

.

m).

4.

Install manifold seal (10) and crossover pipe (7) on exhaust manifold (4) with three washers (9),

capscrews (11), washers (9), and locknuts (8). Tighten locknuts (8) to 37 lb-ft (50 N

.

m).

b. Installation