NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
Page 84 of 1014
NMWR 9-2815-220 CRANKCASE ASSEMBLY OVERHAUL—Continued 0006 00 CLEANING INSPECTION 1. Inspect components not covered by an OIP in accordance with WP 0005 00. 2. The main bearing and main thrust bearing bores must be inspected without bearings installed and again with bearings installed. Main bearing caps must be installed in their original locations according to the following procedure: (a) Install crankcase on engine overhaul stand using an appropriate lifting device and secure with four bolts and flat washers. (b) Check main bearing cap stud torque using a torque wrench as shown in Figure 1. Torque on studs must be 450 lb-in. (50.84 N•m). Studs that do not tighten to specified torque must be removed for further inspection. Refer to WP 0005 00 when replacing studs. NOTE Never tighten main bearing studs above recommended torque. NOTE: STUD TORQUE 450 LB-IN. 50.84 N•m Figure 1. Checking Torque of Main Bearing Cap Stud. (c) Apply a light coating of engine oil to the ends of the seven main bearing caps with sleeve bearing halves installed. Using crankcase spreading tool, install the bearing caps in their proper locations in the crankcase, according to the location number stamped on the crankcase and cap. The side of the bearing cap marked “FLY END” must face the rear of the crankcase. 0006 00-2 Change 1 Refer to WP 0005 00 for general cleaning instructions.