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 902 of 1258
TM 9-2320-280-34
1 7 - 1 1 6 . 2
Change 1
1 7 - 2 7 . 1 . REAR SERVO REPAIR (1996-1998 - 4L80-E)
INITIAL SETUP:
Applicable Models
M997A2, M1025A2, M1035A2
M1043A2, M1045A2, M1097A2, M1123
Tools
General mechanic’s tool kit:
automotive (Appendix G, Item 1)
Materials/Parts
Transmission fluid (Appendix B, Item 24)
Manual References
TM 9-2320-280-24P
Equipment Condition
Transmission disassembled into subassemblies
(para. 17-14).
Maintenance Level
General support
This task covers:
a.
Disassembly
c.
Inspection
b.
Cleaning
d.
Assembly
1.
Inspect pistons (4) and (11) for cracks, porosity, and damaged seal grooves. Remove minor burrs and
scoring. Replace if damaged.
2.
Inspect rear servo spring (7) and assist spring (2) for breaks and distortion. Replace if damaged.
3.
Inspect pin (9) for cracks, burrs, bends, and chipped or damaged retainer groove. Replace if damaged.
4±
.
Inspect outer oil seal (10) for nicks, cuts, or damage. Replace seal (10) if nicked, cut, or damaged.
NOT E
If replacing any seal, coat seal with transmission fluid (Dexron
®
I±I±I±)±
.
5±
.
Inspect inner seal (3) and piston seal (5) for nicks, cuts, or damage. Replace inner seal (3) and piston
s±e±a±l (5) if nicked, cut, or damaged.
c. Inspection
1.
Install spring retainer (8), rear servo spring (7), spacer (6), and accumulator piston (4) on pin (9).
2.
Install accumulator piston (4) and assist spring (2) into servo piston (11) and install retaining clip (1)
on pin (9).
d. Assembly
b. Cleaning
a. Disassembly
Clean all parts in accordance with para. 2-13.
1.
Remove retainer clip (1) from pin (9) in servo piston (11).
2.
Remove assist spring (2), accumulator piston (4), spacer (6), rear servo spring (7), and spring
retainer (8) from pin (9).
NOT E
Work area should be well-ventilated, clean, and free from blowing
dirt and dust.
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