MTD 113-080A - Manual (Page 12)

Brake
Cable
Pivot
Point
/■
FIGURE 20.
Chute Deflector—The torsion spring and fiivot
point should be lubricated periodically with ight
oil to pi;'event any rust or binding. Deflector must
work freely.
Wheels—Mower may be provided with ball rear­
ing wheels. Lubricate at least once a season with
light oil. Also, if the wheels are removed fo any
reason, lubricate the surface of the axle boi 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 i
structions.
in-
Throttle—Periodically lubricate throttle control
lever and throttle wire assembly with a few drops
of light oil for ease of operation.
MAINTENANCE
A
CAUTION
When tipping the unit, empty the fuel
tank and keep engine spark plug side
up.
CUTTING BLADE
A. Removal for Sharpening or Replacement
t.
Be sure to disconnect and ground
the spark plug wire before working
on the cutting blade to prevent
accidental engine starting.
Remove the large bolt and lock washer which
holds 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.
A CAUTION
Periodically inspect the blade adapt­
er for cracks, especially if you strike
a foreign object. Replace when nec­
essary.
B. Sharpening
Remove the cutting blade by following the direc­
tions of the preceding section.
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 unbalanced blade. An
unblanced blade will cause excessive vibration
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.
C. Reassembly
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 recommended. 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
3/8" Dia. Bolt 375 in. lb. min., 450 in. lb. max.
5/16" Dia. Bolt 150 in. lb. min., 250 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 mower deck should be cleaned
after each period of use as grass clippings, leaves,
dirt and other matter will accumulate. This ac­
cumulation of grass clippings, etc., is undesirable
12