MTD 112-060A - Manual (Page 8)

Minor carburetor adjustment may be required to
compensate for differences in fuei, temperature,
altitude and load.
All carburetor adjustments should be made with
the air cleaner on engine. Air cleaner mounting
screw must be in carburetor when engine is run.
Best adjustment is made with a fuel tank half full
of gasoline.
To adjust carburetor, refer to the separate engine
manual packed with your mower.
LUBRICATION
IMPORTANT
Always stop engine and disconnect
spark
plug wire before cleaning,
lubricating or doing any kind of
work on lawn mower.
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 4oz.
plastic bottle of light oil lubricant is available.
Order part number 737-0170. Engine oil may also
be used.
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.
Engine— Follow engine manual for lubrication in­
structions.
Throttle— Periodically lubricate throttle control
lever and throttle wire assembly with a few drops
of light oil for ease of operation.
MAINTENANCE
CUTTING BLADE
A. Removal for Sharpening or Replacement
(|) WARNING t
Be sure to disconnect and ground
the spark plug wire before working
on the cutting blade to prevent
accidental engine starting.
3.
Remove the large bolt and lock washer which
holds the blade and adapter to the engine
crankshaft. See figure 11.
Remove the blade and adapter from the
crankshaft. Be careful not to lose the key on
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.
FIGURE 11.
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 un­
balanced blade will cause excessive vibration
when rotating at high speeds, may cause damage
to the mower and could break, causing personal
injury.
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. See
figure 12.
NOTE
It is recommended that the blade
always be removed from the adapter
for the best test of balance.