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11
SECTION 9: ADJUSTMENTS
HANDLE ADJUSTMENT
The handle height may be adjusted. On Model 420,
the handle may also be adjusted to be in line with
the tiller, or swung to the left or right. Refer to the
Control section for details of handle adjustment.
BELT TENSION ADJUSTMENT
Periodic adjustment of the belt tension may be
required due to normal stretch and wear on the belt.
Adjustment is needed if the tines or wheels seem to
hesitate while turning, but the engine maintains the
same speed.
To adjust the tension on the belt, refer to final clutch
adjustment in Assembly Instructions.
CARBURETOR ADJUSTMENT
WARNING:
If any adjustments are
made to the engine while the engine is
running, (e.g. carburetor), disengage all
clutches and tines. Keep clear of all
moving parts. Be careful of heated
surfaces and muffler.
Never make unnecessary adjustments. The factory
settings are correct for most applications. If
adjustments are needed, refer to the separate
engine manual packed with your tiller.
SECTION 10: LUBRICATION
Transmission—The transmission is pre-lubricated
and sealed at the factory. It requires no checking
unless the transmission is disassembled. To fill with
grease, lay the right half of the transmission on its
side. Add 22 ounces of Benalene 920 grease.
Assemble the left half to it. This grease can be
obtained at your nearest authorized dealer. Order
part number 737-0300.
Clutch Handle—Lubricate the pivot point on the
clutch handle and the cable at least once a season
with light oil. The control must operate freely in both
directions.
Pivot Points—Lubricate all pivot points and
linkages at least once a season with light oil.
Tine Shafts—Remove tine assemblies and
lubricate the tine shafts at least once a season.
Wheel Shafts—Remove wheel assemblies and
lubricate the axle shafts at least once a season.
SECTION 11: MAINTENANCE
WARNING: Disconnect the spark
plug wire and ground it against the
engine before performing any repairs
or maintenance.
ENGINE
Refer to the separate engine manual for engine
maintenance instructions.
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and
follow instructions carefully.
Service air cleaner every ten hours under normal
conditions. Clean every hour under extremely dusty
conditions. Poor engine performance and flooding
usually indicates that the air cleaner should be
serviced. To service the air cleaner, refer to the
separate engine manual packed with your unit.
IMPORTANT: Never run your engine without air
cleaner completely assembled.
The spark plug should be cleaned and the gap
reset every 25 hours of engine operation. Spark
plug replacement is recommended at the start of
each tiller season; check engine manual for correct
plug type and gap specification.
Clean the engine regularly with a cloth or brush.
Keep the cooling system (blower housing area)
clean to permit proper air circulation which is
essential to engine performance and life. Be certain
to remove all dirt and combustible debris from
muffler area.
CLEANING THE TINE AREA
Clean the underside of the tine shield after each
use. The dirt washes off the tines easier if washed
off immediately instead of after it dries.