Sears Craftsman 917.378442 Manual Del Propietário página 11

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PRODUCT
SPECIFICATIONS
Serial Number:
Date of Purchase:
Gasoline
Capacity/Type:
1.6 Quarts (Unleaded
Regular)
Oil Type (API-SF-SJ):
SAE 30 (above 32°F); SAE 5W-30 (below 32°F)
Oil Capacity:
20 Ounces
Spark Plug (Gap:
.030")
Champion
RJ19LM
or J19LM
Blade Bolt Torque:
35-40 ft. Ibs,
• The model and serial numbers
will be found on a decal on the rear of the lawn mower
housing.
Record both serial number
and date of purchase
in space provided
above.
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.
BLADE
CARE
For best results, mower blade must be
kept sharp.
Replace
bent or damaged
blades.
TO REMOVE
BLADE
1. Disconnect
spark plug wire from spark
plug and place wire where it cannot
come in contact with spark 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
hard-
ware (bolt, lock washer and 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.
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 (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. Ibs.
IMPORTANT:
Blade bolt is grade 8 heat
treated.
TO SHARPEN
BLADE
NOTE:
We do not recommend
sharpening
blade - but if you do, be sure the blade is
balanced.
Care should be taken to keep the blade
balanced.
An unbalanced
blade will
cause eventual
damage
to lawn mower or
engine.
• The blade can be sharpened
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 exposed.
Place center
hole of blade over the head of the nail.
If blade is balanced,
it should
remain in
a horizontal
position.
It either end of the
blade moves downward,
sharpen
the
heavy end until the blade is balanced.
Blade adapter
Crankshaft
Key -_
keyway
Blade
Crank
Blade
shaft
bolt
\
washer
Trailing edge
Blade adapter
11

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