Poulan Pro PR450N20S, Руководство оператора

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17
MAINTENANCE
LAWN MOWER
Always observe safety rules when per-
forming any main te nance.
TIRES
• Keep tires free of gasoline, oil, or insect
control chemi cals which can harm rub-
ber.
• Avoid stumps, stones, deep ruts, sharp
objects and other hazards that may
cause tire damage.
BLADE CARE
For best results, blade must be kept
sharp. Re place a bent or dam aged blade.
CAUTION: Use only a replacement
blade approved by the manufacturer of
your mower. Using a blade not approved
by the manufacturer of your mower is haz-
ardous, could damage your mower and
void your warranty.
TO REMOVE BLADE
1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with plug.
2. Turn lawn mower on its side. Make
sure air filter and carburetor are up.
3. Use a wood block between blade and
mower hous ing to prevent blade from
turning when re mov ing blade bolt.
NOTE: Protect your hands with gloves
and/or wrap blade with heavy cloth.
4. Remove blade bolt by turning counter-
clockwise.
5. Remove blade and attaching hardware
(bolt, lock wash er, hardened wash er).
NOTE : Remove the blade adapter and
check the key inside hub of blade adapter.
The key must be in good condition to
work properly. Replace adapter if dam-
aged.
TO REPLACE BLADE
1. Position the blade adapter on the en-
gine crank shaft. Be sure key in adapter
and crankshaft keyway are aligned.
2. Position blade on the blade adapter
aligning the two (2) holes in the blade
with the raised lugs on the adapter.
3. Be sure the trailing edge of blade (op-
posite sharp edge) is up toward the
engine.
4. Install the blade bolt with the lock
washer and hardened washer into
blade adapter and crankshaft.
5. Use block of wood between blade and
lawn mower housing and tighten the
blade bolt, turning clockwise.
• The recommended tightening torque is
35-40 ft. lbs.
IMPORTANT : Blade bolt is heat treated.
If bolt needs replacing, replace only with
approved bolt.
Blade
bolt
Crankshaft
keyway
Hardened
washer
Lockwasher
Blade adapter Key
Blade
Trailing edge Crankshaft
Belt
retainer
TO SHARPEN BLADE
NOTE : We do not recommend sharp en-
ing blade - but if you do, be sure the blade
is balanced. An un bal anced blade will
cause eventual damage to lawn mower or
engine.
• The blade can be sharp ened with a file
or on a grinding wheel. Do not attempt
to sharpen while on the mower.
• To check blade balance, drive a nail into
a beam or wall. Leave about one inch of
the straight nail ex posed. Place center
hole of blade over the head of the nail.
If blade is balanced, it should remain in
a horizontal position. If either end of the
blade moves downward, sharpen the
heavy end until the blade is balanced.
ENGINE
Read the maintenance section of your
engine manual.
LUBRICATION
Change the oil after the first two hours of
operation and every 25 hours there af ter
or at least once a year if the mower is not
used for 25 hours in one year. Refer to
engine manual.
NOTE (B&S W26 engines with Synthetic
oil ONLY):
An oil change is not required
but if you desire to change the oil follow
the procedure below.