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 (Continued) 10. Inspect piston pin (7). a. Check diameter of piston pins (7) against limits specified below. Location Sizes and Fits of New Parts inches (mm) Wear Limits A (Diameter of pin) 2.1250 (53.975) 2.1252 (53.9800) 2.1248 (53.9699) Fit of pin to bore 0.0016L (0.0406L) 0.0020L (0.0508L) 0.0032L (0.08128L) 1 2 3 6 8 4 7 8 REPAIR WARNING Cleaning solvent is mildly toxic. Solvent evaporates and both the fumes and liquid are flammable. Continued contact with solvent can cause skin problems. Ensure there is good airflow when using solvent, and work area is away from heat and flames. • Keep fire extinguisher nearby. • Do not breathe solvent fumes. • Avoid skin contact. See Warning in front of Manual. 1. Remove minor burrs, nicks or scratches from pistons (4) with crocus cloth (item 9, WP 0173) dipped in cleaning solvent (item 8, WP 0173). 2. Replace pistons (4) that are distorted, cracked, worn, or abraded. 3. Replace pistons (4) if oil holes in the ring grooves cannot be cleared or if lands are damaged or broken. 4. Replace pistons (4) that are badly burred or scratched. 5. Replace piston rings (1, 2, 3, or 4) that are scuffed, chipped, scratched, or showing signs of abrasion. 6. Replace oil control rings (3) if drain holes cannot be cleared. WP 0142 00-10