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 OIL PUMP ASSEMBLY OVERHAUL—Continued 0013 00 RECLAMATION – Continued (c) Prepare surfaces to be coated in accordance with standard metalizing procedures as follows: (1) Mask surfaces, not to be coated, with suitable grit blast masking material. (2) Grit blast bearing surfaces with clean, oil free 25 mesh chilled iron grit. (3) Remove grit blast masking material and remask with suitable metalspray masking material. (4) Apply 1/8 inch TM spray bronze wire (wire spray system) or self-bonding aluminum bronze powder (thermospray system) to prepared surfaces in accordance with MIL-STD-1687A(1). Coat thickness of approximately 0.010 in. (0.254 mm) over drawing finish dimension to allow for finish machining. (5) Machine coated bearing surfaces to drawing specifications. NOTE All mounting surfaces repaired by this process shall be 100% inspected for coating integrity after machining. The coating shall show no bond separation at the coating to base metal interface. The coating shall be free from blistering, cracking, chipping, and frayed edges. There shall be no bleedout of oil or other contaminants through the finished coating. REPAIR 1. Refer to WP 0005 00 for general repair instructions. 2. Refer to WP 0005 00, Table 2, and Figure 4 when replacing oil pump assembly studs. Table 2. Oil Pump Assembly Standard Stud Identification. References Figure Item Setting Number Stud size and length Number Number Height Required 4 1 25/32 5 5/16-18 (3/4) x 5/16-24 (35/64) x 1-3/8 2 2 1 5/16-18 (3/4) x 5/16-24 (9/16) x 2-9/16 3 5-9/32 3 5/16-18 (23/32) x 5/16-24 (39/64) x 5-11/16 4 5-11/16 2 5/16-18 (11/16) x 5/16-24 (3/4) x 6 Figure 4. Oil Pump Assembly Standard Studding. 0013 00-7 Change 1