Craftsman 917.377431 Owner's Manual page 12

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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.
If either end of the
blade moves downward,
sharpen the
heavy end until the blade is balanced.
Blade
Crankshaft
Key
keyway
Blade
Lockwasher
\
Blade
shaft
bolt
Hardened
Trailing
washer
edge
Blade adapter
GRASS CATCHER
(If purchased
as an accessory)
• The grass catcher may be hosed with
water, but must be dry when used.
• Check your grass catcher often for
damage or deterioration.
Through
.normal
use it will wear. If catcher needs
replacing, replace only with a manufac-
turer approved replacement catcher.
Give the lawn mower model number
when ordering.
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 ddve
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.
12
• If lubricant is required, use only Texaco
Starplex Premium Grease, part no.
750369.
Do not substitute.
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 ddve wheel
area and must be cleaned to free ddve
wheels.
If necessary to clean the ddve wheels,
check both front wheels.
• Remove hubcaps, hairpin cotters and
washers.
• Remove wheels from wheel adjusters.
• Remove any trash or grass cuttings from
inside the dust cover, pinion and/or ddve
wheel gear teeth.
• Put wheels back in place.
• If after cleaning, the drive wheels do not
turn freely, contact your nearest
authorized service center.
ENGINE"
LUBRICATION
Use only high quality detergent oil rated with
API service classificationSF, SG or SH.
Select the oil'sSAE viscositygrade according
to your expected operating temperature.
NOTE: Although multi-viscosity oils (5W30,
10W30 etc.) improve startingin cold weather,
these multi-viscosity oilswill result in increased
oil consumption when used above 32°F.
Check your engine oil level more frequentlyto
avoid possil_e engine damage from running
low on oil.
Change the oil after every 25 hours of
operation orat least once a yeaP if the lawn
mower is not used for 25 hours in one year.
Check the crankcase oil level before starting
the engine and after each five (5) hoursof
continuous use."lighten oil plugsecurely e ach
timeyou check theoil level.

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