TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 573 of 953
TM 9-2320-280-20-2 5-2 Change 3 5-2. TRANSMISSION SERVICE This task covers: a. Draining Fluid c. Transmission Filter Installation b. Transmission Filter Removal d. Replenishing Fluid INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Nonmetallic round seal (Appendix G, Item 286) Filter assembly (Appendix G, Item 31) (3L80) Gasket (Appendix G, Item 48) (3L80) Filter element kit (Appendix G, Item 33) (4L80-E) Gasket (Appendix G, Item 58) (4L80-E) Two locknuts (Appendix G, Item 103) Transmission fluid (Appendix C, Item 26 or 27) Drycleaning solvent (Appendix C, Item 18) Manual References TM 9-2320-280-10 TM 9-2320-280-24P General Safety Instructions Drycleaning solvent is flammable and will not be used near an open flame. a. Draining Fluid b. Transmission Filter Removal NOTE Perform steps 1 through 5 for 3L80 transmissions only. 1. Remove thirteen capscrews (6), oil pan (3), and gasket (5) from transmission (4). Discard gasket (5). 2. Clean gasket (5) material from transmission (4) and oil pan (3) mating surfaces. 3. Remove capscrew (11), oil filter (10), and spacer (9) from transmission (4). 4. Pull suction tube (8) from oil filter (10) and remove seal (7). Discard seal (7). WARNING Drycleaning solvent is flammable and will not be used near an open flame. A fire extinguisher will be kept nearby when the solvent is used. Use only in well ventilated places. Failure to do this may result in injury to personnel and/or damage equipment. 5. Clean suction tube (8) and oil pan (3) thoroughly with drycleaning solvent. NOTE • Transmission service for the 3L80 and 4L80-E transmissions is basically the same. Differences are noted. • Do not shift through driving gear ranges when warming trans- mission fluid for removal. Shifting through driving gear ranges is a procedure used only when refilling transmission fluid. • Transmission should be warm when draining fluid. • Have drainage container ready to catch fluid. 1. Remove drainplug (1) and gasket (2) from oil pan (3). Allow fluid to drain. NOTE Inspect fluid for grit, foaminess, and/or milkiness. If present, notify DS maintenance. 2. Install gasket (2) and drainplug (1) in oil pan (3) and tighten drain plug (1) to 20 lb-ft (27 N•m).