TM 10-4320-315-24
4-6.
MAINTENANCE OF PISTONS - (Cont)
(9)
Inspect piston pin bushing for burrs, worn spots, and discoloration.
(10)
Measure piston pin at wear surfaces. Outer diameter of piston pin must go between 1.3787-1.379 in.
(34.994-35.0 mm). If not replace, defective piston pin.
(11)
Measure piston pin bore in piston. If bore measurement exceeds 1.379-1.3792 in. (35.0-35.006 mm)
piston is defective and must be replaced.
c.
INSTALL.
(1)
Install piston rings (5) on piston (3) placing the gaps evenly spaced around piston.
(2)
Insert one circlip (1) in groove in piston pin bore (6) with opening at 12 or 6 o'clock position.
(3)
Install piston (3) on connecting rod (4), arrow on top of piston (3) pointing toward pushrod bores (7).
(4)
Insert piston pin (2) into piston bore (6). Pin must contact circlip (1).
(5)
Install second circlip (1) with opening at 12 or 6 o'clock position.
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