TM 9-2320-366-34-4(12) Insert No. 1 piston ring (7) inside No. 1 cylinder bore(10) far enough to be within area of ring travel, 2.00-3.00in. (5.08-7.62 cm) deep.CAUTIONEnds of ring must be filed if gap is not withinlimits. File from outer surface of ring towardinner surface. Failure to comply may result indamage to equipment.(13) Measure end gap of No. 1 piston ring (7). Refer toTable 20-7. Piston/Piston Ring Clearances.(14) Perform steps (12) and (13) for remaining No. 1 pistonrings (7), No. 2 piston rings (8), and oil control rings (9).(15) Measure piston oil control ring groove (11). Refer toTable 20-7. Piston/Piston Ring Clearances.(16) Install oil control ring (9) on piston crown (1).(17) Measure clearance between oil control ring (9) and oilring groove (11). Refer to Table 20-7. Piston/PistonRing Clearances.(18) Perform steps (15) through (17) for remaining pistoncrowns (1).Table 20-7. Piston/Piston Ring ClearancesItem to be measuredClearanceEnd gap of No. 1 piston ring installed in cylinder bore size of 4.134in. (10.50 cm) (A)0.016-0.026 in. (0.04-0.06 cm)End gap of No. 2 piston ring installed in cylinder bore size of4.1348 in. (10.50 cm) (B)0.028-0.038 in. (0.07-0.09 cm)End gap of oil control ring installed in cylinder bore size 4.1348 in.(10.50 cm) (C)0.012-0.024 in. (0.03-0.06 cm)Groove width in piston crown for oil control ring (D)0.1586-0.1596 in. (0.402-0.405 cm)Clearance between groove and oil control ring (E)0.0015-0.0031 in. (0.003-0.007 cm)20-45
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