Powerhead
90-8M0050731 MAY 2011 Page 4A-51
4. Carefully position the piston over the end of the rod. Ensure the locating washers are in place.
a - Sleeve
b - Locating washers
Piston Pin Tool 91‑ 74607A 3
Piston Pin Tool 91‑ 92973A 1
5. Insert piston pin tool 91‑74607A3 for S/N 0T178499 and below, and 91‑92973A1 for S/N 0T178500 and above, and push the
sleeve out of the piston. Ensure the piston pin tool remains in the piston assembly.
6. Install the piston pin and tap the piston pin into the piston with a mallet.
a - Sleeve
b - Piston pin tool
c - Piston pin tool
d - Piston pin
Piston Pin Tool 91‑ 74607A 3
Piston Pin Tool 91‑ 92973A 1
7. Install two new piston pin lockrings using lockring installation tool 91‑77109A3 for S/N 0T178499 and below, and 91‑93004A2
for S/N 0T178500 and above.
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