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Maintenance (continued)
Gearcase lubrication
To perform this operation, first remove
the gearcase from the outer tube as
follows:
1. Loosen the gearcase clamp bolt.
2. Remove the index bolt from the
gearcase.
3. Slide the gearcase out of the tube.
CAUTION!
Do not remove the D-shaped shim
washer from the gearcase clamp!
The shim washer prevents damage
from over tightening the tube clamp
bolt.
Using a grease gun, pump lithium
based grease (about 10 grams
[1/3 oz.]) into the grease fitting
(B) on the gearcase until you see
old grease being purged from the
gearcase. Purged grease will be
visible in the outer tube cavity.
4. Clean up excess grease, then
reassemble the gearcase onto the
outer tube. Make sure the index bolt
fits into the hole on the outer tube.
Securely tighten both bolts.
135-Hour Maintenance
■
Combustion chamber should be decarbonized, and the valve clearance should be adjusted. It is highly recommended
that this is done by a Shindaiwa-trained service technician.
Valve Adjustment
1. Remove cylinder cover, rocker arm cover, and spark plug. Rotate the crankshaft
while observing the piston through the spark plug opening. When the piston is
at the top of the compression stroke (TDC), the valves can be adjusted.
2. Loosen adjuster lock nut so that the 2.5 mm hex socket head adjustment
screw can turn freely.
CAUTION!
■
Performing a valve adjustment incorrectly may cause hard starting and/or
can damage the engine.
■
If you are unfamiliar with this engine or uncomfortable with this procedure,
consult with an authorized Shindaiwa servicing dealer.
3. Insert 0.10 mm (0.004 in.) feeler gauge between valve stem tip and rocker arm.
4. Turn adjustment screw:
• clockwise = tighter
• counterclockwise = looser
until feeler gauge is almost snug. Back off just enough to allow gauge to slip
out with limited resistance.
5. While holding the adjustment screw in place with the hex driver, tighten the
lock nut with a wrench.
6. Turn engine over several times, and return to TDC-compression. Recheck with
proper feeler gauge to make sure clearance adjustment did not change as a
result of tightening the lock nut. Readjust as necessary.
7. Replace rocker arm cover gasket to assure proper sealing and install cover.
20
Gearcase lubrication
Outer tube
Remove the outer tube from the gearcase
Lubricate cutter assembly and gearcase
Gearcase Clamp bolt
Index bolt
Gearcase
B
Gearcase
grease fitting
IMPORTANT!
If a new gasket is not available and/
or the old gasket is not damaged, the
old gasket may be reused. Never use
cracked or damaged gaskets!
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