TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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Table 1. Repair Specifications List - Continued. (1) POINT OF MEASUREMENT (2) NEW MINIMUM INCHES (MM) (3) NEW MAXMUM INCHES (MM) (4) WEAR LIMIT INCHES (MM) PISTON ASSEMBLY (CROSS–HEAD TYPE) Piston Crown Saddle to crown distance 2.8325 (71.95) 2.8395 (72.12) * Diameter Top 3.8486 (97.75) 3.8516 (97.83) * Below both compression rings 3.8636 (98.14) 3.8666 (98.21) * Above/below seal ring groove 3.8666 (98.21) 3.8676 (98.24) * Above/below bearing saddle 2.8350 (72.01) 2.8380 (72.09) * Compression Rings Gap (top ring) 0.0230 (0.58) 0.0380 (0.97) 0.0600 (1.52) Gap (No.2 and 3) 0.0200 (0.51) 0.0300 (0.76) 0.0600 (1.52) Clearance (ring to groove) Top ring 0.0030 (0.08) 0.0066 (0.17) 0.0086 (0.22) No. 2 0.0070 (0.18) 0.0100 (0.25) 0.0140 (0.36) No. 3 0.0050 (0.13) 0.0080 (0.20) 0.0130 (0.33) Oil Control Rings Gap (two rings–lower groove) 0.0100 (0.25) 0.0250 (0.64) 0.0440 (1.12) Gap (one ring–upper groove) 0.0070 (0.18) 0.0170 (0.43) 0.0370 (0.94) Clearance (two rings– lower groove) 0.0015 (0.04) 0.0055 (0.14) 0.0080 (0.20) Clearance (one ring– upper groove) 0.0005 (0.01) 0.0040 (0.10) 0.0065 (0.17) Piston Skirt TM 9-2815-205-24 0106 0106-4