Quantcast PISTONS, RINGS, AND ASSOCIATED PARTS REPAIR -- CONTINUED - TM-9-2815-247-34_471

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TM 9--2815--247--34 0069 00--6 PISTONS, RINGS, AND ASSOCIATED PARTS REPAIR -- CONTINUED 0069 00 Inspection -- Continued 7.   Check the top ring groove (5) and the second ring groove (6) by measuring over 0.11547 inch (2.93294 mm) dia. pins (17). Replace pistons that do not meet the following limits (21 and 22). 8.   Check the third ring groove (7) and the fourth ring groove (8) by measuring the inside width (18 and 19). Replace pistons that do not meet the following limits. 9.   Measure the piston diameter at the bottom of the skirt, 90 degrees to piston pin (20). Replace pistons that do not meet the following limits. REF NO. POINT OF MEASUREMENT SIZES AND FITS OF NEW PARTS inches (mm) WEAR LIMITS 21 Diameter of top keystone groove in piston (measured over 0.11547 dia. pins): standard 0.0100 (0.254) oversize 0.0200 (0.508) oversize 0.0300 (0.762) oversize 0.0400 (1.016) oversize 5.7300 (145.542) 5.7400 (145.796) 22 Diameter of second keystone groove in piston (measured over 0.11547 dia. pins): standard 0.0100 (0.254) oversize 0.0200 (0.508) oversize 0.0300 (0.762) oversize 0.0400 (1.016) oversize 5.7390 (145.7706) 5.7490 (146.0246) 18 Inside width of intermediate groove in piston 0.0960 (2.4384) 0.0970 (2.4638) 19 Inside width of oil control ring groove in piston 0.1880 (4.7752) 0.1890 (4.8.006) 20 Diameter at bottom of skirt 90 degrees to pis- ton pin: standard 0.0100 (0.254) oversize 0.0200 (0.508) oversize 0.0300 (0.762) oversize 0.0400 (1.016) oversize 5.7390 (145.7706) 5.7400 (145.796) Figure 8 5 6 7 8 21 17 22 19 20 20 18 22 17


 


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