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 914 of 1258
TM 9-2320-280-34
1 7 - 1 2 8
Change 1
1 7 - 2 9 . OIL PUMP ASSEMBLY REPA
I R (4L80-E) ( C o n
t ’ d )
CAUTION
All transmission parts must be lubricated with clean transmission
fluid (Dexron
®
III) before assembly. Foreign material will cause
transmission damage.
1.
Install plug (8), spring pin (7), regulator valve (11), two springs (12), spring retainer (13), reverse
boost valve (14), and bushing (15) in cover (10) with snapring (16).
2.
Install converter limit valve (23), spring (2), and plug (1) in cover (10) with spring pin (22).
3.
Install converter enable valve (5) and spring (4) in cover (10). Compress spring (4) and install spring
retainer (3).
4.
Install plug (6), spring pin (21), spring (20), converter clutch valve (19), and plug (18) in cover (10)
with snapring (17).
5.
Install drive gear (25) and driven gear (24), with marked surfaces facing up, in oil pump body (26).
NOT E
• Align reference marks on cover and pump body.
• Vent shield is used on 1997-1998 transmissions only.
6.
Install cover (10) and vent shield (29.1) on pump body (26) with five capscrews (29). Tighten
capscrews (29) to 18 lb-ft (24 N
•
m).
7.
Coat seal (27) with petrolatum and install on pump body (26).
8.
Coat selective thrust washer (9) with petrolatum and install on cover (10).
NOT E
Use small chamfer end of seal installer to install inner seal ring.
9.
Using seal installer, pusher, and sizer, install inner seal ring (30) in pump cover (10) groove.
10.
Using seal installer, pusher, and sizer, install outer seal ring (31) in pump cover (10) groove.
11.
Using oil pump seal installer, install oil pump seal (28) on pump body (26).
d. Assembly
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