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 SHROUDS, AIR DEFLECTORS, AND COOLING FANS, VANES, AND 0025 00 HOUSING OVERHAUL—Continued INSPECTION – Continued Table 1. Components Requiring Overhaul Inspection – Continued. COMPONENT OIP Intermediate left bank mounting plate 11641919* (Table 41) (item 13, Figure 4) Lower left bank engine cooling shroud 12354437* (Table 42) (item 15, Figure 4) Lower right bank engine cooling shroud 12354439** and (item 16, Figure 4) 12354442*** (Table 43) Engine cooling fan centrifugal housing 8682658 (Table 44) (item 3, Figure 5) Fan rotor engine body hub (item 8, Figure 5) 8761050 (Table 45) Cooling engine axial fan impeller (item 9, Figure 5) 554132 (Table 46) Damper end radiator fan shroud (item 11, Figure 5) 8682785 (Table 47) Flywheel end mounting bracket (item 15, Figure 5) 8682682 (Table 48) *Models AVDS-1790-2CA and AVDS-1790-2DA **Model AVDS-1790-2CA ***Model AVDS-1790-2DA RECLAMATION 0025 00-5 Change 1 Engine cooling fans (part no. 554132) with broken blades can be reclaimed by TIG welding using the procedure outlined below. Refer to Table 48. NOTE Only weld fan blades that are broken on the outer 2/3 of the blade (within 3.16 in. (80.264 mm) of the outer edge). a. Thoroughly clean the fan using cleaning compound solvent and a wiping rag. b. Using the TIG welding process in accordance with AMS-STD-1595, weld the broken blades with a 1/16 or 3/32 x 36 x 4043 electrode. c. Using a suitable hand grinder, grind the welded areas to drawing specifications (DWG 8761242). d. Reinspect after welding to ASTM-E-1417 with the following acceptance criteria: (1) Linear indications exceeding 1/16 inch (1.5240 mm) in length are not acceptable. (2) Craters exceeding 1/8 inch (3.3020 mm) in diameter and 1/8 inch (3.3020 mm) in depth are not acceptable. (3) Excessive porosity is not acceptable. (4) Unacceptable indications may be blended out and rechecked - provided blueprint dimensions are maintained.