Operator Presence System; Blade Care/Removal; To Sharpen Blade; Battery - Craftsman 917.272860 Owner's Manual

Lawn tractor 22.0 hp, 42" mower electric start automatic transmission
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TRACTOR
Always observe safety rules when per-
forming any maintenance.
BRAKE OPERATION
If tractor requires more than six (6) feet
stopping distance at high speed in high-
est 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 rub-
ber.
• 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 operator presence and interlock
systems are working properly. If your
tractor does not function as described,
repair the problem immediately.
• The engine should not start unless
the brake pedal is fully depressed and
attachement
clutch control is in the
disengaged position.
• When the engine is running, any at-
tempt 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 at-
tempt by the operator to leave the seat
should shut off the engine.
• The attachment clutch should never op-
erate unless the operator is in the seat.
BLADE CARE
For best results mower blades must be
kept sharp. Replace bent or damaged
blades.
BLADE REMOVAL
1. Raise mower to highest position to
allow access to blades.
2. Remove blade bolt, lock washer and
flat washer securing blade.
3. Install new or resharpened
blade
with trailing edge up towards deck as
shown.
IMPORTANT: To ensure proper as-
sembly, center hole in blade must align
with star on mandrel assembly.
4. Reassemble blade bolt, lock washer and
flat washer in exact order as shown.
5. Tighten blade bolt securely (27-35 Ft.
Lbs. torque).
IMPORTANT:
Blade bolt is heat treated.
If bolt needs replacing, replace only with
approve bolt shown in the Repair Parts.
Flat
Washer\
Lock
Washers.
Blade Bolt
Edge Up
Mandrel
_Star
TO SHARPEN
BLADE
NOTE: We do not recommend sharp-
ening 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 bal-
ancer, 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 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.
5/8" Bolt
Blade
Center
BATTERY
Your tractor has a battery charging
system which is sufficient for normal use.
However, 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.
19

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