Craftsman 917.271731 Owner's Manual page 18

17.5 hp electric start 42" mower 6 speed transaxle 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-
justedo (See "TO ADJUST
BRAKE"
in the
Service
and Adjustments
section
of this
manual)..
• 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 damager
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
immediatelyr
• 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
seal
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 atign 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
Mandrel Assembly
Trailing Edge Up
Blade
Center
Hole
Flat
Lock Washer
k_Hex
Bolt (Grade)
*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 balancedo
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
balancero
(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.
o Slide blade on to an unthreaded
portion
of the steet 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
balancedp_n'__
//
5/8" Bolt or
Center Hole
w._
BATTERY
Your tractor
has a battery
charging
system
which is sufficient
for normal
use.
How-
ever, periodic
charging
of the battery
with
18 an automotive
charger
wilt extend
its life.

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