Bolens 112-428R372 - Manual (Page 12)

Rear Discharge Door—The torsion springs a id pivot
points should be lubricated periodically with lie ht oil to
prevent any rust or binding. Door must work frtiely.
Wheels—Mower may be provided with ball bearing
wheels. Lubricate at least once a season with light oil.
Also, if the wheels are removed for any reason, lubri­
cate 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.
Engine—Follow engine manual for lubrication instruc­
tions.
MAINTENANCE
A
WARNING: Be sure to disconne ct and
ground the spark plug wire befere per­
forming any repairs or maintenant e.
NOTE: When tipping the unit, empty the fuel i ank and
keep engine spark plug side up.
TROUBLE SHOOTING
Refer to page 16 of this manual for trouble ;;hooting
information.
CUTTING BLADE
When removing the cutting blade for sharpening or
replacement, protect hands by using heavy g oves or
a rag to grasp the cutting blade. Remove the Dolt and
bell washer which hold the blade and adapte r 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 wNch hold
the blade to the adapter.
A WARNING: Periodically inspect tlie blade
adapter for cracks, especially if you
strike a foreign object. Replac e 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 gri riding to
prevent an unbalanced blade. An unbalance d blade
will cause excessive vibration when rotating at high
speeds, may cause damage to the mower ai id could
break, causing personal injury.
It is recommended that the blade always be i emoved
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 he avy 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; 450 in. lbs. min., 600 in. lbs. max.
Blade Adapter Bolts: 200 in. lbs. min., 350 in. lbs. max.
To insure safe operation of your unit, ail nuts and
bolts must be checked periodically for correct tight­
ness.
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 allowed 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).
ENGINE
Refer to the separate engine manual for engine
maintenance instructions.
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and follow
instructions carefully.
Service air cleaner every 25 hours under normal con­
ditions. Clean every few hours under extremely dusty
conditions. Poor engine performance and flooding
usually indicates that the air cleaner should be ser­
viced. To service the air cleaner, refer to the separate
engine manual packed with your unit.
The spark plug should be cleaned and the gap reset
once a season. Spark plug replacement is recom­
mended at the start of each mowing season; check
engine manual for correct plug type and gap specifi­
cations.
Clean the engine regularly with a cloth or brush.
Keep the cooling system (blower housing area) clean
to permit proper air circulation which is essential to
engine performance and life. Be certain to remove all
grass, dirt and combustible debris from muffler area.
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