TM-9-2815-237-34 HMMWV Engine Direct Support & General Support Maintenance Manual Download
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2-35 TM 9-2815-237-34 2-15. ENGINE DISASSEMBLY INTO SUBASSEMBLIES (Cont’d) z. Pistons and Connecting Rods 1. 2. 3. 4. 5. 6, 7. 8. 9. Remove ridge from upper inside wall of each cylinder (12) with ridge reamer. Rotate cylinder block (4) approximately 90°. Rotate crankshaft (13) to gain access to two nuts (6). Check sides of connecting rod (10) and rod cap (7) for matching identification numbers. If no numbers are present, stamp connecting rod (10) and rod cap (7) with cylinder number for assembly. Remove two nuts (6) securing rod cap (7) to connecting rod (10) and remove rod cap (7) and two bearings (8). Discard bearings (8). Cover connecting rod bolts (9) with 3/8-in. rubber hose. Push connecting rod (10) and piston (11) out from the inside and remove from cylinder block (4). Remove rubber hose from connecting rod bolts (9) and install rod cap (7) on connecting rod (10) and secure with nuts (6). Repeat steps 3 through 8 for remaining pistons and connecting rods.