NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
Page 175 of 1014
NMWR 9-2815-220 PISTON AND CONNECTING ROD ASSEMBLY OVERHAUL—Continued 0011 00 INSPECTION – Continued 4. Refer to WP 0005 00 and the OIPs in Table 1 for specific inspection criteria for selected items. Table 1. Components Requiring Overhaul Inspection. COMPONENT OIP Piston connecting rod (item 3, Figure 6) 11683933 (Table 4) Internal combustion piston (item 8, Figure 6) 11683943 (Table 5) Piston oiler lubricating nozzle assembly (item 14, Figure 6) 11684078 (Table 6) Piston pin (item 6, Figure 6) 11683935 (Table 7) REPAIR 1. Refer to WP 0005 00 for general repair instructions. 2. Piston repair. (a) Remove minor nicks or scratches with crocus cloth dipped in cleaning compound and polish the skirt of the piston. (b) When replacing damaged or worn pistons it is important that all of the engine’s pistons be of the same size (oversize) and same weight. Inspect the top of the piston for oversize identification stamp and weight identification code. Refer to Figure 3 for oversize stamp and weight code location. NOTE If the weight code is missing or not legible, weigh the piston and metal stamp the weight identification code at the location shown in Figure 3, using 0.25 in (6.35 mm) inch high characters in accordance with Table 2. Table 2. Piston Weight Code Identification Chart. CODE WEIGHT (LBS) CODE WEIGHT (LBS) CODE WEIGHT (LBS) 5 7.75 (3.515 kg) B 7.93 (3.596 kg) H 8.11 (3.678 kg) 7.76 (3.519 kg) 7.94 (3.601 kg) 8.12 (3.683 kg) 7.77 (3.524 kg) 7.95 (3.606 kg) 8.13 (3.687 kg) 4 7.78 (3.528 kg) C 7.96 (3.610 kg) J 8.14 (3.692 kg) 7.79 (3.533 kg) 7.97 (3.615 kg) 8.15 (3.696 kg) 7.80 (3.538 kg) 7.98 (3.619 kg) 8.16 (3.701 kg) 3 7.81 (3.542 kg) D 7.99 (3.624 kg) K 8.17 (3.705 kg) 7.82 (3.547 kg) 8.00 (3.628 kg) 8.18 (3.710 kg) 7.83 (3.551 kg) 8.01 (3.633 kg) 8.19 (3.714 kg) 2 7.84 (3.556 kg) E 8.02 (3.637 kg) L 8.20 (3.719 kg) 7.85 (3.560 kg) 8.03 (3.642 kg) 8.21 (3.723 kg) 7.86 (3.565 kg) 8.04 (3.646 kg) 8.22 (3.728 kg) 1 7.87 (3.569 kg) F 8.05 (3.651 kg) M 8.23 (3.733 kg) 7.88 (3.574 kg) 8.06 (3.655 kg) 8.24 (3.737 kg) 7.89 (3.578 kg) 8.07 (3.660 kg) 8.25 (3.742 kg) A 7.90 (3.583 kg) G 8.08 (3.665 kg) 7.91 (3.587 kg) 8.09 (3.669 kg) 7.92 (3.592 kg) 8.10 (3.674 kg) 0011 00-5 Change 1