TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 17-116.2 Change 1 17-27.1. 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. NOTE If replacing any seal, coat seal with transmission fluid (Dexron ® III). 5. Inspect inner seal (3) and piston seal (5) for nicks, cuts, or damage. Replace inner seal (3) and piston seal (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). NOTE Work area should be well-ventilated, clean, and free from blowing dirt and dust.