Tires; Operator Presence System; Blade Care/Removal; To Sharpen Blade - Craftsman 917.2720601 Owner's Manual

16.0 hp, 42" mower electric start automatictransmission
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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-
justed.
(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 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
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.
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.
Install 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.
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.
Trailing.._._
Blade Center_c._-_,
_
"_>_
._%
Mandrel
Flat W:s_:r'"_
:_'_ta?Sem
bly
Lock Washerj.-_
'
_,_r
*A Grade 8 heat treated bolt can be identified
by six lines on the bolt head.
TO SHARPEN
BLADE
NOTE:
We do not recommend sharpen-
ing 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 f{le
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.
Blade
5/8" Bolt or "
Center Hole
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.
• Keep battery and terminals clean.
19

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