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 NOTE Quality control will inspect finished parts to ensure adherence to procedures. 1. Pressure oil pump housing (part no. 11683965). Repair cracks in the pump housing by mig welding. Refer to Table 23 (OIP 11683971). Welding operators to be qualified per AWS D17.1. (a) Thoroughly clean and degrease housing with cleaning compound degreaser. (b) Using a suitable hand grinder, grind all cracks in pump housing to a V-shape with an included angle of 60 degrees minimum with a 1/8 inch minimum radius at the root of the groove. (c) Using a gas tungsten arc welding machine, weld all cracks in accordance with Welding Code 12472301. NOTE When welding inside diameters of bearing and impeller bores, overbuild welds sufficiently to allow for remachining to original drawing tolerances. (d) Using a suitable grinder, remachine welded housing surfaces and bore I.D.’s to drawing specifications (DWG 11683965). (e) Inspect weld. (1) Apply liquid penetrant and inspect weld per ASTM-E-1417. (2) Acceptance criteria is no linear indications due to weld cracking, crater cracking, lack of fusion, etc. No porosity exceeding 1/8 inch diameter for a single indication on the entire welded area, or more than three indications larger than 1/16 inch diameter on the entire welded area. (f) Pressure test in accordance with TCM/M60 PD 62236, Class 6 (100 psi [689 kPa]). 0013 00-3 Change 1