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Maintenance - Craftsman 917.271841 Owner's Manual

21.0 hp electric start 42" mower automatic 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 ad usted. (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 end
corrosion.
OPERATOR PRESENCE SYSTEM
Be sure operator presence and intedeck
systems are working properly. If your
tractor does not function as described,
repair the problem immediately.
• The engine should not start unless the
clutch/brake pedal is fully depressed
and attachement 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
For best results mower blades must be
kept sharp. Replace bent or damaged
blades.
4. Reassemble hex bolt, lock washer and
flat washer in exact order as shown.
5. Tighten bolt securely (27-35 Ft. Lbs.
torque).
IMPORTANT:
Blade bolt is grade 8 heat
treated.
Center,
Assembly
Hex Belt
_
Star
(Grade)*_._- _
Flat
*A Grade 8 heat treatedbolt can be identified
by six tineson 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 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 on to an unthraaded 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.
5/8" Bolt
or Pin
BLADE REMOVAL
1. Raise mower to highest position to
allow access to blades.
2. Remove hex bolt, lock washer and flat
washer securing blade.
3. Instalt new or resharpened blade with
trailing edge up towards deck as
shown.
IMPORTANT: To ensure proper assembly,
center hole in blade must align with star on
mandrel assembly.
Center Hole
BA'I-FERY
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.
• Keep battery and terminals clean,
• Keep battery bolts tight.
• Keep small vent holes open.
• Recharge at 6-10 amperes for 1 hour.
2O

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