Bolens 120-280R000 - Manual (Page 12)

Minor carburetor adjustments may be required to
compensate for differences in fuei, tempeiature,
aititude and load. To adjust carburetor, refer to the
separate engine manual packed with your mo/ver.
NOTE: A dirty air cieaner wiil cause an engine to run
rough. Be certain air cleaner is clean and attached to
the carburetor before adjusting carburetor. Refei to the
separate engine manual.
LUBRICATION
A
WARNING: Always stop engim and
disconnect spark plug wire before ::lean-
ing, lubricating or doing any kind o' work
on lawn mower.
Blade Control—Lubricate the pivot points on the blade
control handle and the brake cable at least c nce a
season with light oil. The blade control must о Derate
freely in both directions.
Chute Deflector—The torsion spring and pivo: point
should be lubricated periodically with light oil о pre­
vent any rust or binding. Deflector must work freely.
Wheels—The mower may be provided with bal bear­
ing wheels. Lubricate at least once a season wil h light
oil. Also, if the wheels are removed for any reasor, lubri­
cate the surface of the axle bolt and the inner s jrface
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 lubricati )n in­
structions.
Throttle—Periodically lubricate throttle contro lever
and throttle wire assembly with a few drops of light oil
for ease of operation.
Chain—The chain should be lubricated periolically
with a few drops of light oil to prevent any rust or
binding. Use very little or no oil if unit is beinc used
in a dusty or sandy area.
MAINTENANCE
A
WARNING: Be sure to disconned and
ground the spark plug wire before pei form­
ing 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 17 of this manual for trouble shooting
information.
CUTTING BLADE
When removing the cutting blade for sharpening or
replacement, 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.
A
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 unbalanced blade. An unbalanced 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.
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
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 or other matter. If this debris is aliowed to
accumulate, it will invite rust and corrosion, and may
cause an uneven discharge of grass clippings at the
next cutting.
The deck may be cleaned by tilting the mower and
scraping clean with a suitable tool (make certain the
spark plug wire is disconnected).
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