NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 GENERAL MAINTENANCE, OVERHAUL, AND REPAIR PROCEDURES—Continued 0005 00 INSPECTION OF COMPONENTS - Continued 7. Repairing Damaged Threads. a. When determined feasible, damaged threads should be repaired by re-tapping, use of a thread die, or by “chasing” on a lathe. b. Tapped holes that have mutilated threads may be repaired by filling tapped hole and by welding, re- drilling, and tapping hole to original size or by use of helical-coil inserts. 8. Removing Burrs, Scratches, and Raised Metal. Small defects such as nicks, burrs, scratches, raised metal, etc., may be removed by using a fine mill file, soft stone, or crocus cloth dipped in mineral spirits or petroleum solvent. ASSEMBLY INSTRUCTIONS 1. Assembly Procedures. Detailed instructions for assembly are contained in TM 9-2815-220-34. 2. Lubrication. The oil used in the engine is crucial to the reliability and performance of the vehicle. The oil has three primary functions that are essential to the health of the engine. It provides a continually renewed surface coating on parts to reduce friction between contact surfaces. The oil removes heat from internal engine areas resulting from the combustion process and removes combustion by product contaminates from the engine. Without these functions being accomplished, successful operation of the vehicle power plant would be of short duration and poor power delivery. Use of the proper oil, maintaining correct level, and keeping the oil clean are of utmost importance to obtain maximum performance. a. TM 9-2815-220-10 contains instructions, locations, intervals, and materials for lubrication of the engine, subassemblies and components. b. All mating wear surfaces shall be lubricated during assembly. Lubricants are also applied to O-rings, seal rings, and lip-type seals to ease assembly and prevent damage during initial start. c. Oil specifications are as follows: (1) MIL-PRF-21260E, type I, Grade 10, engine oil shall be used during break-in and preservation. (2) MIL-PRF-2104G, Grade 10, engine oil will be used during operation when ambient temperature is above 0°F (-18°C). Refer to TM 9-2350-256-10 for cold weather operations. d. Capacities (approximate) are as follows: (1) Dry Engine – 20.0 US gallons (2) Oil and filter change – 17.0 US gallons (3) Recheck the oil level after the engine has operated long enough to reach operating temperature and allowed cool. (4) Never allow the oil level to go below the “add” mark or above the “full ” mark on the oil level gage. 0005 00-23 Change 1