14
Maintenance
(continued)
Gearcase Lubrication
The gearcase should be filled with 60 cc (2.0
fl.oz.) of Mobil SHC634 Synthetic Gear Oil.
A maximum of 75-80 cc can be used, but
never to exceed 80 cc. Operation with exces-
sive oil level will result in high operating
temperatures.
Do not overfill!
Turn the gearcase to the LH side and
4.
and allow all used gearcase oil to drain
into a small container.
Place the gearcase on the RH side and
5.
supported so the outer tube is paral-
lel to the ground. Refill the gearcase
with 60 cc (2.0 fl.oz) of Mobil SHC634
Synthetic Gear Oil to the bottom of
the chamfer on the output gear. The
correct oil depth is 5/8" (15.5 mm). DO
NOT OVERFILL!
NOTE:
It may be necessary to use a heat gun to
soften the sealer material.
WARNING!
BURN DANGER! The gear-
case will be extremely hot after use!
Replacing the gearcase oil
Disconnect spark plug wire at engine.
1.
Remove the LH Drum and axle assembly
2.
(as viewed from the operating position).
Wipe the sideplate clean and remove four
screws (it is not necessary to remove the
gearcase from the outer tube).
Turn gearcase side plate to break the
3.
seal and lift the plate from the gearcase.
Inspect the sideplate for damage and
6.
clean off all remaining liquid gasket mate-
rial with brake cleaner or acetone. Coat
the outer sealing flange of the sideplate
with Loctite Ultragrey Silicon Sealant or
Threebond No. 1104 Liquid Gasket.
Replace the cover and install the four
7.
sideplate screws. Tighten securely.
Reinstall the drum and axle assembly.
8.
Refer to the section “Assembly:
Sweeper Assembly” for instructions.
300-hour maintenance
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 dam-
aged gaskets!
Turn engine over several times, and
6.
return to TDC-compression. Recheck
with proper feeler gauge to make sure
clearance adjustment did not change as a
result of tightening the locknut. Readjust
as necessary.
Replace rocker arm cover gasket to
7.
assure proper sealing and install cover.
Valve Adjustment
Remove cylinder cover, rocker arm cover,
1.
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.
Loosen adjuster locknut so that the 2.5
2.
mm Allen socket head adjustment screw
can turn freely.
Insert 0.10 mm (0.004”) feeler gauge
3.
between valve stem tip and rocker arm.
Turn adjustment screw (clockwise =
4.
tighter, counter-clockwise = looser) until
feeler gauge is almost snug. Back off just
enough to allow gauge to slip out with
limited resistance.
While holding the adjustment screw in
5.
place with the Allen driver, tighten the
locknut with a wrench.
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 autho-
rized Shindaiwa servicing dealer.
135 hour maintenance
(cont.)
Turn gearcase side plate to break the seal
and lift the plate from the gearcase
Fill the gearcase to the bottom of the
chamfer on the output gear.
DO NOT OVERFILL!
