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Craftsman 917.375020 Manual De Instrucciones página 12

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LAWN
MOWER
Always observe safety rules when per-
forming any maintenance.
TIRES
• Keep tires free of gasoline, oil, or insect
control chemicals
which can harm rub-
ber.
• Avoid stumps, stones, deep ruts, sharp
objects and other hazards that may
cause tire damage.
DRIVE WHEELS
Check front drive wheels each time before
you mow to be sure they move freely.
The wheels not turning freely means trash,
grass cuttings, etc. are in the drive wheel
area and must be cleaned to free drive
wheels.
If necessary to clean the drive wheels, be
sure to clean both front wheels.
1. Remove hubcaps, Iocknuts & washers.
2. Remove wheels from wheel adjusters.
3. Remove any trash or grass cuttings
from inside the dust cover, pinion and/
or drive wheel gear teeth.
4. Put wheels back in place.
NOTE:
If after cleaning, the drive wheels
do not turn freely, contact a Sears or other
qualified service center.
GEAR CASE
• To keep your drive system working
properly, the gear case and area around
the drive should be kept clean and free
of trash build-up.
Clean under the drive
cover twice a season.
• The gear case is filled with lubricant to
the proper level at the factory.
The only
time the lubricant needs attention is if
service has been performed on the gear
case.
BLADE CARE
For best results, mower blade must be
kept sharp.
Replace a bent or damaged
blade.
A 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 housing to prevent blade from
turning when removing 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 washer, hardened washer).
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 damaged.
Blade adapter
Key
Crankshaft
Lockwasher
Blade
Blade
bolt
Hardened
":_ ....
",
washer
l:railing/edge
retainer
TO REPLACE BLADE
1. Position the blade adapter on the en-
gine crankshaft.
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
(opposite sharp edge)is
up toward
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. Ibs.
IMPORTANT:
Blade bolt is heat treated.
If bolt needs replacing,
replace only with
approved bolt shown in the Repair Parts
section of this manual.
TO SHARPEN
BLADE
NOTE: We do not recommend
sharp-
ening blade - but if you do, be sure the
blade is balanced.
Care should be taken
to keep the blade balanced. An unbal-
anced blade will cause eventual damage
to mower or engine.
• The blade can be sharpened with a file
or on a grinding wheel. Do not attempt
12
to sharpen while on the mower.

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