MTD 21A-340-100 - Manual (Page 11)

SECTIONS: LUBRICATION
A WARNING: Always stop engine and
disconnect spark piug wire before
cieaning, iubricating or doing any kind
of work on tiller.
Pivot Points—Remove the belt cover and lubricate
all moving parts and pivot points at least once a
season using SAE 30 engine oil.
Chain Drive—^The chain case is pre-lubricated and
sealed at the factory. It requires no checking.
SECTION 10: MAINTENANCE
A WARNING: Disconnect spark plug
wire and ground it against the engine
before performing any repairs or
maintenance.
TROUBLE SHOOTING
Refer to page 13 of this manual for trouble shooting
information.
ENGINE
Refer to the separate engine manual for all
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 25 hours under normal
conditions. Clean every few hours 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 once a season. Spark plug replacement is
recommended at the start of each tilling season;
check engine manual for correct plug type and gap
specifications.
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.
BELT REMOVAL AND REPLACEMENT
Your tiller has been engineered with a belt made of
special material (Kevlar Tensile). They should not be
replaced with an off-ithe-shelf belt.
If belt replacement is required, order belt by part
number from your nearest authorized service dealer.
Drive Belt Part No. 754-0428
Drive Belt
(Refer to Figure 18)
1. Disconnect and ground the spark plug wire
against the engine.
2. Remove the belt cover from the left side of the
tiller as follows.
• Remove two self-tapping screws from the
front of belt cover. See Figure 17.
• Remove the hex stop nut and flat washer from
the side of the belt cover.
3. Remove the belt keeper from the idler pulley by
removing the idler pulley nut.
4. Remove the belt from the idler pulley and from
around the chain icase pulley.
5. Hold the engine pulley and remove the hex bolt,
lock washer and flat washer, which secure the
engine pulley. See . Slide the pulley half out
from between the belt keepers. Remove the belt.
6. Reassemble new belt, following instructions in
reverse order.
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