MTD 112-530A - Manual (Page 10)

LUBRICATION
IMPORTANT
Always stop engine and disconnect
spark plug wire before cleaning,
lubricating or doing any kind of
work on lawn mower.
Blade Spindle Assembly—The blade spindle
assembly is equipped with a grease fitting. Use
grass discharge chute for access to the fitting
located under the deck. Use multi-purpose grease.
Lubricate PRIOR to initial use and every 25 hours
thereafter.
Wheels—Unit is provided with ball bearing
wheels. Lubricate at least once a season with light
oil. To lubricate the rear wheels, remove the oil
caps and add several drops of oil. See figure 16.
Also, 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.
MAINTENANCE
CUTTING BLADE
A. Removal for Sharpening or Replacement
\
WARNING J
Be sure to disconnect and ground
the spark plug wire before working
on the cutting blade to prevent
accidental engine starting.
1. Remove the large bolt and lock washer which
holds the blade and adapter to the blade spin­
dle.
2. Remove the blade and adapter from the spin­
dle. Be careful not to lose the key on the spin­
dle.
3. 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 16.
Protective Shield—The pivot points on the protec­
tive shield should be lubricated periodically with
light oil to prevent any rust or binding.
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. Check oil level before each use.
Throttle—Periodically lubricate throttle control
lever and throttle wire assembly with a few drops
of light oil for ease of operation.
Friction point between idler bracket assembly
(Ref. No. 9 on page 15) and deck should be
greased once each season with a multi-purpose
grease.
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 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.
NOTE
It is recommended that the blade
always be removed from the adapter
for the best test of balance.
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