TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 PISTONS, RINGS, AND ASSOCIATED PARTS REPLACE/REPAIR 0142 00 INSPECTION CAUTION It is important that all pistons be the same size and weight. Failure to comply may result in premature failure. 1. Inspect the top of the piston for oversize and weight code identification stamps. NOTE Early pistons supplied as individual spare parts were not stamped to indicate weight. To insure that all pistons used for replacement are properly matched by weight, all pistons that are not coded must be weighed and code stamped before being installed in an engine. If the weight code is missing or not legible, weigh the piston and metal-stamp the weight identification code at the location shown, using 0.25-inch (6.35-mm) high characters in accordance with the following table. Stamp Code Piston Weight Pounds Stamp Code Piston Weight Pounds Stamp Code Piston Weight Pounds 5 7.75 7.76 7.77 B 7.93 7.94 7.95 H 8.11 8.12 8.13 4 7.78 7.79 780 C 7.96 7.97 7.98 J 8.14 8.15 8.16 3 7.81 7.82 7.83 D 7.99 8.00 8.01 K 8.17 8.18 8.19 2 7.84 7.85 7.86 E 8.02 8.03 8.04 L 8.20 8.21 8.22 1 7.87 7.88 7.89 F 8.05 8.06 8.07 M 8.23 8.24 8.25 A 7.90 7.91 7.92 G 8.08 8.09 8.10 WP 0142 00-5