Piston Pins

REMOVAL





1. Assemble the Piston Pin Tools as shown.





2. Adjust the length A of the piston pin driver.
3. Place the piston on the piston base, and press the pin out with a hydraulic press. Make sure that the recessed portion of the piston aligns with the lips on the collar.

INSPECTION





1. Measure the diameter of the piston pin.





2. Zero the dial indicator to the piston pin diameter.





3. Measure the piston pin-to-piston clearance. If the piston pin clearance is greater than 0.024 mm (0.0009 inch), remeasure using an oversized piston pin.

NOTE: All replacement piston pins are oversize.





4. Check the difference between the piston pin diameter and the connecting rod small end diameter.

INSTALLATION





1. Adjust the length B of the piston pin driver and shaft.





2. Place the piston on the piston base and press the pin in with a hydraulic press. Make sure that the recessed portion of the piston aligns with the lugs on the piston base head.