4-38 - POWERHEAD 90-830234R3 DECEMBER 1997
• Use piston ring expander (91-24697) to remove
piston rings. Always install new piston rings.
NOTE: Cylinders must be honed in order for new
rings to seat properly.
a
b
51081
a - Piston Ring Expander (P/N 91-24697)
b - Piston Rings
Eye protection MUST BE worn while removing
piston pin lockrings from piston.
• Using an awl, remove piston pin lockrings from
both ends of piston pin. Never re-use piston pin
lockpins. Hold shop cloth over lockring area
when snapping out lockrings.
a
53986
a - Lockrings
• Support piston and tap out piston pin, using ser-
vice tool 91-74607A2, as shown.
a
b
51086
a - Piston Pin
b - Wrist Pin Tool (91-74607A2)
• Remove piston pin needle bearings (29 per pis-
ton pin) and locating washers (2 per piston) as
shown.
IMPORTANT: We recommend that you use new
needle bearings at reassembly for lasting repair.
However, if needle bearings must be re-used,
keep each set of bearings identified for reas-
sembly on same connecting rod.
a
51088
a - Locating Washers
• Inspect crankshaft bearing.
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