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In reassembly;
1) When reassembling main bearing cover, assemble governor lever shaft and governor arm before reinstalling them
into crankcase.
NOTE: If replacement
of
oil seal is required, force-fit new oil seal before reassembly.
2)
When reassembling main bearing cover, apply oil to bearing surfaces, gear train, tappets, and
oil
seal lips, and form a
thin film
of
oil on main bearing cover face. Mount an oil seal guide onto .crankshaft
to
prevent damage to oil seal lips.
NOTE:
Turn crankshaft
to
TDC, and lock the balancer driven gear by inserting a
4mm
dia. rod thru the plug hole and Into a hole in
the balancer driven gear (Fig
6-38)
3) Check
if
side clearance
of
crankshaft
is
0"0.2mm,
and adjust it using adjusting collar, if needed.
4)
Clamping torque
of
mounting bolts for main bearing cover
is
170-1
90
kg-cm
(1
2.3-1 3.7 ft-lbs.).
\TJOWCl?.>nOnD*
TIMING
MARK
CAMSHAFT
Fig.
6-3-9
6-3-1
1
CAMSHAFT
and
TAPPET
1)
To
prevent tappets from falling out and being damaged when camshaft is removed, turn crankcase over on its side as
shown in
Fig.
6-3-9. Push tappets inward
to
clear cam lobes, and remove camshaft.
2)
Withdraw tappets.
NOTE: Mark them
so
that they can be reinstalled
in
the same holes.
In reassembly;
1) Put tappets back
in
their corresponding hole first and then mount camshaft.
CAUTION:
DON'T
FORGET TO MOUNT GOVERNOR SLEEVE
ON
CAMSHAFT.
2)
Timing marks
on
camshaft gear and crankshaft gear must be matched up.
If
valve timing is
off,
properly or may not run at all.
engine will not func
:tion
NOTE: Mount camshaft
so
that the marked tooth
on
crankshaft gear is between the two marked teeth of the camshaft
gear. (Fig.
6-3-9)
6-3-12 CONNECTING
ROD
and
PISTON
1)
Straighten out the bent tabs
of
rod lock washer and remove bolts from connecting rod.
2)
Remove
oil
scraper, lock washer and connecting rod cap from crankshaft.
3)
Remove piston from connecting rod by detaching two clips, and then removing piston pin.
4)
Remove piston rings from piston
by
widening open ends.
-1
5-