Craftsman 917.270751 Owner's Manual page 18

8.5 hp electric start 42" mower 6 speed transaxle lawn tractor
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TRACTOR
Always observe safety rules when
performing
any maintenance.
BRAKE OPERATION
If tractor requires more than six (6) feet
stopping distance
at high speed in highest
gear, then brake must be adjusted. (See
"TO ADJUST BRAKE" in the Service and
Adjustments
section of this manual).
TIRES
• Maintain proper air pressure in all tires
(See "PRODUCT
SPECIFICATIONS"
section of this manual).
• 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.
NOTE: To seal tire punctures and prevent
flat tires due to slow leaks, tire sealant
may be purchased from your local parts
dealer. Tire sealant also prevents tire dry
rot and corrosion.
OPERATOR
PRESENCE
SYSTEM
Be sure that operator presence
and
interlock systems are working properly. If
your tractor does not function as described
below, repair the problem immediately.
• The engine should not start unless the
clutch/brake
pedal is fully depressed
and attachment
clutch control is in the
disengaged
position.
• When the engine is running, any
attempt by the operator to leave the seat
without first setting the parking brake
should shut off the engine.
• When the engine is running and the
attachment
clutch is engaged,
any
attempt by the operator to leave the seat
should shut off the engine.
• The attachment
clutch should never
operate unless the operator
is in the
seat.
BLADE CARE
IMPORTANT:
To ensure proper assembly,
center hole isn blade must align with star
on mandrel assembly.
• Reassemble
hex bolt, lock washer and
flat washer in exact order as shown.
• Tighten bolt securely (27-35 Ft. Lbs.
torque).
IMPORTANT:
Blade bolt is Grade 8 heat
treated.
Trailinc
Flat Washer
Lock
Up
Mandrel Assembly
Blade Center
Hole
\Star
_Hex
Bolt (Grade 8)* _
*A Grade 8 heat treated bolt can be identified
by six lines on the bolt head.
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
excessive
vibration and eventual damage
to mower and engine.
• The blade can be sharpened
with a file
or on a grinding wheel. Do not attempt
to sharpen while it is on the mower.
• To check blade balance, you will need a
5/8" diameter steel bolt, pin, or a cone
balancer. (When using a cone balancer,
follow the instructions supplied with
balancer).
NOTE: Do not use a nail for balancing
blade. The lobes of the center hole may
appear to be centered, but are not.
• Slide blade onto an unthreaded
portion
of the steel bolt or pin and hold the bolt
or pin parallel with the ground. 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.
For best results mower blades must be
kept sharp.
Replace bent or damaged
blades.
BLADE REMOVAL
j
Blade
)
• Raise mower to highest position to allow
access to blades.
• Remove hex bolt, lock washer and flat
washer securing
blade.
• Install new or resharpened
blade with
trailing edge up towards deck as shown.
BATTERY
Your tractor has a battery charging system
which is sufficient for normal use. How-
ever, periodic charging of the battery with
an automotive charger will extend its life.
18

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