TM 5-3895-346-14
ENGINE OVERHAUL
CONNECTING ROD
c.
Slide the front guide bushing J 4971-6 (with the pin end facing out) in the fixture.
d.
Install spacer J 7608-3 in the fixture.
e.
Align the upper end of the connecting rod with the hole in the reaming fixture.
f.
Install the rear guide bushing J 1686-5 on the reamer J 7608-21, then slide the reamer and
bushing into the fixture.
g.
Turn the reamer in a clockwise direction only when reaming or with- drawing the reamer. For
best results, use only moderate pressure on the reamer.
h.
Remove the reamer and the connecting rod from the fixture, blow out the chips, and
measure the inside diameter of the bushings. The inside diameter of the bushings must be
1.3760 to 1.3765 inches. This will provide a piston pin-to-bushing clearance of 0.0010 to
0.0019 inch with a new piston pin. A new piston pin has a diameter of 1.3746 to 1.3750
inches.
Assemble Connecting Rod to Piston
Apply clean engine oil to the piston pin and bushings. Refer to Fig. 2 and assemble the connecting rod to the
piston as follows:
1.
Place the piston in the holding fixture (Fig. 9).
2.
Place a new piston pin retainer in position. Then place the crowned end of installer J 23762
against the retainer and strike the tool just hard enough to deflect the retainer and seat it evenly in
the piston.
CAUTION
Do not drive the retainer in too far or the piston bushing may be moved inward and
result in reduced piston pin end clearance.
Figure 8. Reaming Bushings
Figure 9. Installing Piston Pin Retainer
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