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 CRANKCASE ASSEMBLY OVERHAUL—Continued 0006 00 REPAIR – Continued (b) To detect dimensional changes caused by welding repair, precisely measure crankcase at several key positions depending upon the location of the repair. For repair to side walls, measure the positions outlined below. Letters in parentheses below refer to dimension identifications used in Figure 7 unless otherwise indicated. (1) Across the main bearing cap support web machined surfaces (B). (2) Across the inside of the crankcase at the junction of the side wall and the oil pan rail (D). (3) From oil pan rail face to main bearing cap support face (C). (4) From cylinder mounting deck to crankshaft bearing support bore centerline using a suitable plug or bore in the crankcase bearing bore (A). This measurement shall be within 8.377 – 8.369 in. (212.776 – 212.573 mm). (5) Oil pan rail shall be flat within 0.010 (0.254 mm) when all four corners are on the same plane. (c) For repair in other locations, measure in the appropriate locations to insure that critical dimensions are held. Record dimensions for future use. Figure 7. Points of Measure for Checking Crankcase Before and After Welding Repair. 0006 00-10 Change 1