Lubrication; Maintenance - MTD 11A-433E500 Owner's Manual

When cutting in heavy or moist grass, the
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rear of lawnmower may be raised higher to
allow better discharge of the grass.
CARBURETOR ADJUSTMENT
Minor carburetor adjustment may be required to
compensate for differences in fuel, temperature,
altitude and load. Refer to the separate engine
manual packed with your mower for carburetor
adjustment information.
HANDLE HEIGHT ADJUSTMENT
Your mower has provisions for two handle
height positions. The notch on the flat portion of
the lower handle indicates which position the
handle is in. If the notch is facing up or forward
the handle is in the lower height and for the
higher height the notch is facing down.
To change the height setting refer to "Attaching
the Lower Handle".

LUBRICATION

CAUTION: DISCONNECT
PLUG WIRE BEFORE SERVICING.
WHEELS - Lubricate the ball bearings in each
wheel at least once a season with a light oil.
ENGINE - Follow engine manual for lubrication
instructions.
BLADE CONTROL - Lubricate the pivot points
on the blade control handle and the brake cable
at least once a season with light oil. The blade
control must operate freely in both directions.

MAINTENANCE

CUTTING BLADE
WARNING: Be sure to disconnect and
ground the spark plug wire before
working on the cutting blade to pre-
vent accidental engine starting. Protect
hands by using heavy gloves or a rag
to grasp the cutting blades.
Tip mower as specified in separate engine man-
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ual. If it is not specified tip with carburetor up.
Remove the bolt and blade support which holds
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the blade and adapter to the engine crankshaft.
Remove the blade and adapter from the crank-
shaft. See Figure 19.
WARNING: Periodically inspect the
blade adapter for cracks, especially if
you strike a foreign object. Replace
when necessary.
Figure 19
For best results your blade should be sharp.
The blade may be resharpened by removing it
and either grinding or filing the cutting edge
keeping as close to the original bevel as possi-
ble. It is extremely important that each cutting
edge receives an equal amount of grinding to
prevent an unbalanced blade. Improper blade
balance will result in excessive vibration caus-
ing eventual damage to the engine and
mower. Be sure to carefully balance blade af-
SPARK
ter sharpening. The blade can be tested for
balance 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 crank-
shaft and the inner surface of the blade
adapter with light oil. Install the blade adapter
on the crankshaft with the "star" away from the
engine. Refer to figure 19. Place the blade with
the side marked bottom (or with part number)
facing away from the adapter. Align the blade
bell support over the blade with the tabs in the
holes of the blade and insert the hex bolt.
Tighten the hex bolt to the torque listed below:
Blade Mounting Torque
Center Bolt 450 in. lb. min., 600 in.lb. max.
To insure safe operation of your unit, ALL nuts
and bolts must be checked periodically for
correct tightness.
After prolonged use, especially in sandy soil
conditions, the blade will become worn and
lose some of the original shape. Cutting effi-
ciently will be reduced and the blade should
be replaced. Replace with an approved factory
replacement blade only. Possible damage re-
sulting from blade unbalance condition is not
the responsibility of the manufacturer.
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Blade Adapter
Blade
CAUTION: Cutting grass in sandy
soil condition causes abrasive wear
to the blades.
Blade Bell
Support
Hex Bolt