Sears CRAFTSMAN 917.388111 Manual Del Propietário 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 rubber.
• 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.
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
hazardous,
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 and hardened washer).
TO REPLACE
BLADE
1. Position
blade on the blade adapter
aligning
the two (2) holes in the blade
with the raised lugs on the adapter.
2.
Be sure the trailing edge of blade (oppo-
site sharp edge) is up toward the engine.
3.
Install the blade bolt with the lock
washer
and hardened
washer
into
blade adapter
and crankshaft.
4.
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.
Blade adapter
Lockwasher
_
bolt
Hardened
washer
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 the blade - but if you do, be sure
the blade is 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.
If either end of the
blade moves
downward,
sharpen
the
heavy end until the blade is balanced.
GRASS
CATCHER
• The grass catcher
may be hosed with
water, but must be dry when used.
• Check your grass catcher
often for dam-
age or deterioration.
Through
normal
use it will wear.
If catcher
needs replac-
ing, replace
only with approved
replace-
ment catcher shown
in the Repair
Parts
section
of this manual.
Give the lawn
mower
model number when ordering.
ENGINE
LUBRICATION
Use only high quality detergent
oil rated
with API service
classification
SG-SL.
Select the oil's SAE viscosity
grade
according
to your expected
operating
temperature.
SAE VlSCOSlTY
GRADES
F
-20
0
30
32
40
60
80
100
c -_0
-2;
-1;
;
1;
_0
10
4;
TEMPERATURE
RANGE ANTICIPATED
BEFORE NEXT OIL CHANGE
NOTE:
Although
multi-viscosity
oils
(5W30, 10W30
etc.) improve
starting
in
Key
Crankshaft
cold weather,
these multi-viscosity
oils will
__e
result in increased
oil consumption
when
used above 32°R
Check your engine oil
level more frequently
to avoid possible
engine damage
from running
low on oil.
Check the crankcase
oil level before
starting
the engine and after each five (5)
"
hours of continuous
use. Tighten
oil plug
_
ge_0_
securely
each time you check the oil level.
d
Crankshaft 12
÷
388111-es-412691_r0indd
12
4_
2/23/2007
10:59:50AM
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