TM-9-2815-237-34 HMMWV Engine Direct Support & General Support Maintenance Manual Download
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a. Cleaning b. Inspection c. Repair TM 9-2815-237-34 2-17. CRANKSHAFT REPAIR This task covers: a. Cleaning c. Repair b. Inspection INITIAL SETUP Tools Equipment Condition General mechanic’s tool kit: Engine disassembled automotive (Appendix E, Item 1) (para. 2-15). Micrometer (Appendix E, Item 16) Materials/Parts Abrasive crocus cloth (Appendix B, Item 5) Manual References TM 9-2815-237-34P into subassemblies 1. Clean all drilled oil passages (5) with a rod and cloth. 2. Refer to para. 2-9 for additional cleaning information. NOTE For general inspection instructions, refer to para. 2-10. 1. Inspect crankshaft (1) for scratches, nicks, and cracks. Replace if scratched, nicked, or cracked. 2. Check main bearing journals (4) and connecting rod journals (6) for taper, out-of-round, and diameter using an outside micrometer. Replace crankshaft (1) if any bearing journal is tapered, out-of-round, or out of specifications (table 2-2 or 2-3). 3. Inspect rear seal area (3) for roughness, scoring, grooving, flaking, pitting, and galling. Replace crankshaft (1) if rough, scored, grooved, flaked, pitted, or galled. 4. Inspect threaded holes (2) and (7) in crankshaft (1) for damage. Replace crankshaft (1) if threads are damaged. Buff all minor nicks and scratches using abrasive crocus cloth. 2-52