TM 5-3895-346-14
ENGINE OVERHAUL
CONNECTING ROD
CONNECTING ROD
3.
Place the upper end of the connecting rod between the piston pin bosses and in line with the piston
pin holes. Then slide the piston pin in place. If the piston pin-to-bushing clearances are within the
specified limits, the pin will slip into place without use of force.
4.
Install the second piston pin retainer as outlined in steps 1 and 2.
5.
After the piston pin retainers have been installed, check for piston pin end clearance by cocking the
connecting rod and shifting the pin in its bushings.
6.
One important function of the piston pin retainer is to prevent the
oil, which cools the underside of
the piston and lubricates the piston pin bushings, from reaching
the cylinder walls. Check each
retainer for proper sealing with leak detector J 23987 (Fig. 10).
Place the suction cup over the
retainer and hand operate the lever to pull a vacuum of 10 inches
on the gage. A drop in the gage
reading indicates air leakage at the retainer.
Figure 10. Checking Piston Pin
Retainer for Proper Sealing
7.
Install the piston rings on the piston as outlined in Piston and Piston Rings.
8.
Install the piston and connecting rod assembly in the engine as outlined in Cylinder Liner.
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