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 CYLINDER VALVES AND ASSOCIATED PARTS REPAIR 0145 00 REPAIR 1. Discard valves (intake or exhaust) that do not conform to the limits specified under inspection (faces are badly warped, cracked, pitted, or burned; stems or locking grooves are badly pitted, scored, or scratched). 2. Reface slightly pitted or burned valves (1 and 2) that do not have 360° of contact revealed at inspection. Reface to specifications (A through F) in the following table. 3. Recheck refaced valves (1 and 2) for 360° contact (repeat inspection steps 5 and 6). 4. Check valve length (G and H) from seat contact to tip of stem. Discard valve if length is not within limits specified in the following table. Location Sizes and Fits of New Parts inches (mm) Wear Limits A (Intake valve seat angle) 15° ± 15' B (Intake valve seat width) 0.0890 (2.260) 0.0990 (2.514) 0.1200 (3.048) C (back grind angle) 30° D (Exhaust valve seat angle) 45° +15'/-0' E (Exhaust valve seat width) 0.0600 (1.524) 0.0700 (1.778) 0.1200 (3.048) F Regrind on this line when width of seat exceeds 0.120-inch (3.048mm) G (intake valve length) 6.355 (161.417) 6.369 (161.773) 6.3740 (161.900) H (exhaust valve length) 7.010 (178.054) 7.024 (178.410) 7.0340 (178.664) END OF WORK PACKAGE INTAKE VALVE EXHAUST VALVE A B B A C D E E D C G H F F WP 0145 00-4