4-15. MAINTENANCE OF CRANKCASE

TM-10-4320-315-24 Pumping Assembly Water 600 GPM Trailer Mounted (NSN 4320-01-31448844) Manual
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TM 10-4320-315-24 4-15. MAINTENANCE OF CRANKCASE This task covers: a. Disassembly b. Inspect c. Repair d. Assembly INITIAL SETUP: Tools Equipment Conditions General Mechanics Tool Kit Camshaft and tappets removed (para. 4-14). (Item 1, Appendix B) Crankshaft removed (para. 4-13). Materials/Parts Lockwashers (TM 10-4320-315-24P) a. DISASSEMBLE. (Figure 4-21) (1) Remove plugs (1, 2, 3, 4, 5, and 6) and sealing rings (7, 8, 9, 10, and 11). (2) Remove clamping bushings (12). (3) Remove piston cooling nozzle (13) and lockwasher (14) (for piston pin cooling). b. INSPECT. (1) Check oil ducts for free passage. Clean and remove obstructions. (2) Check walls and bearing webs for cracks. Replace crankcase if cracks are found. (3) Check condition of bearing bores. If wear marks on bearing shells are not noticeable, check dimensions of bearing bores. Correct dimension is 3.0535-3.0542 in. (77.5-77.519 mm). c. REPAIR. Repair is accomplished by replacement of parts. d. ASSEMBLE. (1) Install sealing rings (7, 8, 9, 10, and 11) and plugs (1, 2, 3, 4, 5, and 6). (2) Install clamping bushings (12). (3) Install lockwashers (14) and piston cooling nozzles (13). 4-34

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