TM 9-4310-397-14
6-10. CONNECTING ROD, PISTONS, RINGS, AND LINERS AND CYLINDER BLOCK INSPECTION AND
REPAIR. - Continued
(q)
Check second and third ring grooves using a new piston ring (Figure 6-78, 1) and a feeler gauge. Ring
groove clearance must not exceed 0.008 in. (0.20 mm). Replace piston if clearance is exceeded.
Figure 6-78. Check Second and Third Ring Grooves
NOTE
Piston pin must be in good condition and not worn beyond specification given below.
(r)
Dip piston pin in clean engine oil.
(s)
Install pin (Figure 6-79, 1) through piston.
Figure 6-79. Install Pin
1
Pin (1) should pass through piston using only light thumb pressure.
2
Check taper in piston pin bore by inserting pin from both sides. If pin enters freely, but binds in
the center, the bore could be tapered (2).
3
If bore is not tapered, insert pin to check for bore alignment. Pin should not "click" or need to be
forced into bore on opposite side (3).
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