MTD 111-020R000 - Manual (Page 9)

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FIGURE 11B.—Tecumseh Engine
CARBURETOR ADJUSTMENTS
WARNING: If any adjustments are made to the
engine while the engine is running (e.g. car-
I buretor), keep clear of all moving parts. Be
careful of heated surfaces and muffler.
Minor carburetor adjustment may be required to compen­
sate for differences in fuel, temperature, altitude and load.
Refer to the separate engine manual packed with your mower
for carburetor adjustment information.
NOTE: A dirty air cleaner will cause an engine to run rough.
Be certain air cleaner is clean and attached to the carburetor
before adjusting carburetor. Refer to the separate engine
manual.
LUBRICATION
WARNING: Always stop engine and disconnect
spark plug wire before cleaning, lubricating or
doing any kind of work on lawn mower.
Blade Control—Lubricate the pivot points on the blade con­
trol handle and the brake cable at least once a season with
light oil. See figure 12. The blade control must operate free­
ly in both directions.
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Pivot
Point
FIGURE 12.
Chute Deflector—The torsion spring and pivot point should
be lubricated periodically with light oil to prevent any rust or
binding. Deflector must work freely.
Wheels—The wheels require no lubrication. However, if the
wheels are removed for any reason, lubricate the surface of
the axle bolt and the inner surface of the wheel with light oil.
A 4 oz. plastic bottle of light oil lubricant is available. Order
part number 737-0170. Engine oil may also be used.
Engine—Follow engine manual for lubrication instructions.
Throttle (Optional)—Periodically lubricate throttle control
lever and throttle wire assembly with a few drops of light oil
for ease of operation.
MAINTENANCE
A WARNING: Be sure to disconnect and ground
the spark plug wire before performing any
repairs or maintenance.
NOTE: When tipping the unit, empty the fuel tank and keep
engine spark plug side up.
TROUBLE SHOOTING
Refer to page 12 of this manual for trouble shooting infor­
mation.
CUTTING BLADE
When removing the cutting blade for sharpening or replace­
ment, protect hands by using heavy gloves or a rag to grasp
the cutting blade. Remove the bolt and bell washer which
hold the blade and adapter to the engine crankshaft. Remove
the blade and adapter from the crankshaft.
If the blade or blade adapter needs replacing, remove the
two small bolts, lock washers and nuts which hold the blade
to the adapter.
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WARNING: Periodically inspect the blade
adapter for cracks, especially if you strike a
foreign object. Replace when necessary.
When sharpening the blade, follow the original angle of grind
as a guide. It is extremely important that each cutting edge
receives an equal amount of grinding to prevent an unbal­
anced blade. An unbalanced blade will cause excessive vibra­
tion when rotating at high speeds, may cause damage to the
mower and could break, causing personal injury.
It is recommended that the blade always be removed from
the adapter for the best test of balance.
The blade can be tested by balancing it on a round shaft
screwdriver. Remove metal from the heavy side until It
balances evenly.
Before reassembling the blade and the blade adapter to the
unit, lubricate the engine crankshaft and the inner surface
of the blade adapter with light oil. Lubricating the bolt holes,
bolts and inner surface of the nuts with light oil is also recom­
mended. A 4 oz. plastic bottle of light oil lubricant is available.
Order part number 737-0170. Engine oil may also be used.
When replacing the blade, be sure to install the blade with
the side of the blade marked “Bottom” (or with part number)
facing the ground when the mower is in the operating position.
Blade Mounting Torque
Center Bolt and Blade Adapter Bolts:
375 in. lb. min., 450 in. lb. max.
To insure safe operation of your unit, all nuts and bolts must
be checked periodically for correct tightness.
DECK
The underside of the mower deck should be cleaned after
each use to prevent a buildup of grass clippings, leaves, dirt