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) 9. Measure ring end gap. a. Place each ring (1, 2, 3, 4) one at a time, in the appropriate ring gauge (9) (standard or oversize). NOTE Ring gauges are identified according to ring size. Some gauges are duel purpose tools; i.e., each side for a different size ring. Select the proper ring gauge from the following table. Gauge Identification Ring Size Identification Ring Gauge 5.7500 and 5.7700 Standard and 0.020 in. oversize Item 48 (WP 0176) 5.7600 and 5.7800 0.010 and 0.030 in. oversize Item 45 (WP 0176) 0.7500 and 5.7900 Standard and 0.040 in. oversize Item 46 (WP 0176) b. Measure end gap with a thickness gauge (10) (item 54, WP 0176). Replace rings that do not meet the following limits. Location Sizes and Fits of New Parts inches (mm) Wear Limits 1. (Top compression ring) 0.0250 (0.635) 0.0350 (0.889) 0.0350 (0.889) 2. (Intermediate compression rings – 2nd and 3rd groove) 0.0250 (0.635) 0.0350 (0.889) 0.0350 (0.889) 3. (Oil control ring) 0.0350 (0.889) 0.0450 (1.143) 0.0450 (1.143) 9 10 3 2 2 1 WP 0142 00-9