137
POWERHEAD
ASSEMBLY
7
Using wrist pin driver, oil and start the wrist pin
into the piston wrist pin boss opposite where the
retaining ring is installed. Do not allow the wrist
pin to enter the piston cavity.
Slide one of the wrist pin washers down the wrist
pin. Position the top end of the connecting rod
over the wrist pin. Apply Needle Bearing grease to
the 22 needle bearings and install the bearings
into the connecting rod.
Slide the connecting rod with the needle bearings
and washer up and off the wrist pin, being careful
not to disturb the bearings. Place the connecting
rod and the two wrist pin washers in position in the
piston cavity, aligned with the wrist pin boss.
Finish installing the wrist pin through the connect-
ing rod and the piston until the wrist pin contacts
the installed retaining ring. Check to be sure none
of the needle bearings have been disturbed and
pushed out of the connecting rod. Install a second
new retaining ring.
Install piston rings on each piston. Tapered ring
must be installed in top groove. Spread each ring
with a ring expander just enough to slip it over the
head of the piston and down into place.
COB1133
1. Wrist pin washer COB1134
1
1. Needle bearings COB1135
1. Wrist pin washer COB1137
1
1
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