TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 3-15. REAR MAIN OIL SEAL REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Applicable Models Manual References All except 'A2" models TM 9-2320-280-10 TM 9-2320-280-20 Tools TM 9-2815-237-34P General mechanic's tool kit: automotive (Appendix G, Item 1) Equipment Condition Oil pump removed (para. 3-16). Materials/Parts Drivebelts loosened (TM 9-2320-280-20). Two seals (Appendix E, Item 172) Anerobic gasket sealer (Appendix B, Item 45) General Safety Instructions Lubricating oil (Appendix B, Item 32) Cleaning will be done in a well-ventilated area and Dry-cleaning solvent (Appendix B, Item 14) a fire extinguisher will be kept nearby when solvent Adhesive (Appendix B, Item 1) is used. Personnel Required Maintenance Level One mechanic Direct support One assistant a. Removal NOTE This task is for 6.2 L engine rear main oil seal replacement only. Disassembly of 6.5 L engine is necessary before replacing 6.5 L engine rear main oil seal Refer to TM 9-2815-237-34 for 6.5 L engine rear main oil seal replacement. Before replacement of seal, thoroughly inspect engine crankcase ventilation system, tubes, rubber hoses, and CDR valve for blockage which may have caused pressure build-up in crankcase and seal failure. Correct as necessary. Gently tap rear main bearing cap from engine with rubber or brass mallet. 1. Remove two long capscrews (9), two short capscrews (10), and main bearing cap (6) from engine block (3). NOTE The rear oil seal may be a nylon rope or a neoprene rubber. Perform step 2 for a nylon rope seal. Perform step 3 for a rubber seal. The crankshaft may need to be rotated by front crankshaft bolt to assist in seal removal. 2. Screw a sheet metal screw (1) into nylon rope seal (2). Using pliers, pull nylon rope seal (2) from engine block (3) seal groove. Discard nylon rope seal (2). 3. Using pliers, pull rubber seal (4) from engine block (3). Discard rubber seal (4). 4. Remove seal (5) from rear main bearing cap (6). Discard seal (5). 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 or damage to equipment. 5. Using drycleaning solvent, thoroughly clean the seal groove (8), oil relief slot (7), and engine block (3). 3-30