IMPORTANT: Remove the lower main bearing
only if it needs to
be
replaced.
Use external retaining ring pliers to remove the
lower bearing retaining ring and a bearing separa-
tor to support the bearing. Place the separator
flats against the bearing and press the crankshaft
from the bearing.
Rotate the powerhead
so
the cylinder head faces
up. Remove the
cylinder head and gently push up
on
the connecting rods to remove number 1 and
number 2 piston
assemblies.
IMPORTANT: Protect the condition of the piston
by packing paper
towels between the connecting
rod
and piston.
Do
not allow the connecting
rod
to
contact the inside of the piston skirt during han-
dling.
Remove the piston rings using
an
appropriate ring
expander.
DO
NOT try to save the rings. Install a
complete set of new rings at reassembly.
TYPICAL
22153
POWERHEAD
DISASSEMBLY - 9.9/15
Use Retaining Ring Pliers or equivalent to
remove wrist pin retaining rings. Discard the rings.
COB1129
The fit between the wrist pin to bosses of the pis-
ton
is
loose on both sides. Push the wrist pin
through to free the piston from the connecting
rod
.
If necessary, use Piston Cradle,
PIN
326573, and
Wrist Pin Pressing Pin,
PIN
392511. With the pis-
ton skirt
flush with the cradle, press out the wrist
pin using
an
arbor press.
Be
careful not to lose
any of the 22 needle bearings or the two wrist pin 7
washers. If any of the bearings are worn or lost,
replace all
the bearings
on
reassembly.
COB1130
187
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