5-4
REASSEMBLY PROCEDURES
0
PRECAUTIONS FOR REASSEMBLY
1)
Clean parts throughly before reassembly.
2)Scrape off all carbon deposits from cylinder head, piston top and piston ring grooves.
3)Check lip of oil seals. Replace
oil
seal
if
the lip
is
damaged.
Apply
oil
to the lip before reassembly.
4)Replace all the gaskets with new ones.
5)Replace keys, pins, bolts, nuts, etc.,
if
necessary.
6)Torque bolts and
nuts
to specification referring to the
“TORQUE SPECIFICATIONS”.
7)Apply
oil
to rotating and sliding portions.
8)Check and adjust clearances
and
end plays where specified
in
this manual.
Pay most attention to cleanliness
of
piston, cylinder, crankshaft, connecting rod
and
bearings.
54-1
CRANKSHAFT
(1)
Install crankshaft
on
crankcase using an oil
seal guide to avoid damage to oil seal.
(See Fig.
5-26.)
shaft.
(2)
Install woodruff key
for
the
flywheel
on
crank-
Fig.
5-26
5-4-2
PISTON AND PISTON RINGS
(1)
Install the
oil
ring
first, then second ring and
top
ring.
Spread
the
ring
only
far enough to slip over the
piston and into the correct groove. Use care not
to
distort the ring. (See Fig.
5-27.)
Install the top ring and the second ring with the
punched
mark
“N”
beside the gap
on
the top
side. (See Fig.
5-29.)
OPEN ENDS
OF
PISTON
RING
I
Fig.
5-27
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31
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