TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 17-14 Change 1 17-5. TRANSMISSION CASE REPAIR (3L80) Manual References TM 9-2320-280-24P Equipment Condition Transmission disassembled into subassemblies (para. 17-3). General Safety Instructions • Compressed air for cleaning purposes will not exceed 30 psi (207 kPa). • Protective clothing must be used when steam cleaning. Maintenance Level General support NOTE Work area should be well-ventilated, clean, and free from blowing dirt and dust. 1. Remove transmission case (3) from transmission holding fixture. WARNING When steam cleaning, protective clothing must be used. Failure to do this may cause serious injury. 2. Thoroughly steam clean transmission case (3). WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with effective chip guarding and personal protective equipment (goggles/shield, gloves, etc). 3. Blow all dirt and cleaning solution from transmission case (3) with compressed air. NOTE For general inspection instructions, refer to para. 2-14. 1. Inspect all surfaces and general overall condition of transmission case (3). 2. Inspect front and rear band anchor pins (2) for looseness. Replace transmission case (3) if anchor pins (2) are loose or missing. 3. Inspect intermediate clutch plate lugs (5) for damage. Replace transmission case (3) if lugs (5) are damaged. 4. Inspect governor bore (1) for scoring, pitting, or damage. Replace transmission case (3) if scored, pitted, or damaged. NOTE If transmission was manufactured before March 1, 1990 and a new transmission case is to be used, install a new center support assembly. 5. Inspect all threaded holes in transmission case (3) for damage. Repair any damaged threaded hole with thread repair inserts. If unable to repair threaded hole, replace transmission. b. Inspection a. Cleaning INITIAL SETUP: Applicable Models All vehicles except: M997A2, M1025A2, M1035A2, M1043A2, M1045A2, M1097A2, M1123 Tools General mechanic’s tool kit: automotive (Appendix G, Item 1) Special Tools Bushing service set (Appendix G, Item 33) Driver handle (Appendix G, Item 34) Materials/Parts Bushing (Appendix E, Item 4) Center support assembly (Appendix E, Item 5.1) This task covers: a. Cleaning b. Inspection