Brake Operation; Tires; Operator Presence System; Blade Care/Removal - Craftsman 917.273380 Owner's Manual

Lawn tractor 17.5 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 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 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 trac-
tor 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 al-
low 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 assembly,
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.
Trailing
Mandre,IAs._embly
Edge Up_(._adl
e Center __
Lock Washe;--_
"__
Star
_'f_-Blade Bolt
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 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 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 o
Center He
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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