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, 2.00-3.00
in. (5.08-7.62 cm) deep.
CAUTION
Ends of ring must be filed if gap is not within
limits. File from outer surface of ring toward
inner surface. Failure to comply may result in
damage to equipment.
(13) Measure end gap of No. 1 piston ring (7). Refer to
Table 20-7. Piston/Piston Ring Clearances.
(14) Perform steps (12) and (13) for remaining No. 1 piston
rings (7), No. 2 piston rings (8), and oil control rings (9).
(15) Measure piston oil control ring groove (11). Refer to
Table 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 oil
ring groove (11). Refer to Table 20-7. Piston/Piston
Ring Clearances.
(18) Perform steps (15) through (17) for remaining piston
crowns (1).
Table 20-7. Piston/Piston Ring Clearances
Item to be measured
Clearance
End gap of No. 1 piston ring installed in cylinder bore size of 4.134
in. (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 of
4.1348 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
