Craftsman 917.270912 Owner's Manual page 18

Always observe safety rules when
peflorming 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 surethat operator presence and
interlock systems are working propedy. If
your tractor does not function as de-
scribed 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
For best results mower blades must be
kept sharp. Replace bent or damaged
blades.
BLADE REMOVAL
• Raise mower to highest position to
allow access to blades.
• Remove hex belt, lock washer and flat
washer secudng blade.
• Install new or resharpened blade with
trailing edge up towards deck as
shown.
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.
Trailing Up Mandrel Assembly
Blade Center
Hole
Ftst Washer
Lock
_'-Hex Bolt
°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 belt, pin, or a cone
balancsr. (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 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.
5/8" BoR
or Pin _.Blade
Center Hole
18