TM-9-2320-280-34

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1996

TM-9-2320-280-34 - Page 908 of 1258

TM 9-2320-280-34

1 7 - 1 2 2

Change 1

1 7 - 2 8

. CONTROL VA LVE AND A C C U M U L ATOR HOUSING REPA

I R ( 4 L 8 0 - E

) ( C o n

t

’ d

)

1.

Coat seals (3) and (5)

with petrolatum and install on third clutch piston (4).

2.

Install third clutch piston (4) on housing (2).

3.

Coat seal (6) with petrolatum and install on fourth clutch piston (7).

NOT E

Perform step 4 for 1995-1996 transmissions only.

4.

Install fourth clutch piston (7) on pin (8) and install snapring (9) in lower snapring groove.

5.

Install fourth clutch piston (7) and pin (8) in housing (2) and secure with snapring (1) on the outside

housing.

6.

Install springs (17) and (11) on control valve assembly (16).

7.

Install gasket (15), spacer plate (14), and gasket (13) on control valve assembly (16).

8.

Install gasket (12) and accumulator housing (2) on control valve assembly (16) with six

capscrews (10). Tighten capscrews (10) in sequence shown to 97 lb-in (11 N

•

m).

h. Accumulator Housing Assembly

1.

Inspect accumulator housing (2) for cracks, breaks, and scoring on bores and sealing surfaces.

Remove minor scoring. Replace if damaged.

2.

Inspect springs (11) and (17) for breaks and distortion. Replace if damaged.

3.

Inspect pistons (4) and (7) for cracks, breaks, and chipped or damaged seal grooves. Replace if

damaged.

4.

Inspect pin (8) for cracks, bends, and damaged grooves. Replace if damaged.

g. Accumulator Housing Inspection