Craftsman 917.28705 Manual Del Operador página 18

TRACTOR
Always observe safety rules when per-
forming any maintenance.
BRAKE OPERATION
If tractor requires more than five (5) feet to
stop at highest speed in highest gear on a
level, dry concrete or paved surface, then
brake must be checked and adjusted. (See
"TO ADJUST BRAKE" in the Service and
Adjustments section of this manual).
TIRES
, Maintain proper air pressure in all tires
(See the side of tire for proper PSI.).
* 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 AND
REVERSE OPERATION SYSTEM (ROS)
Be sure operator presence and reverse
operation systems are working properly. If
your tractor does not function as de-
scribed, repair the problem immediately.
* The engine should not start unless the
brake pedal is fully depressed, and the
attachment clutch control is in the disen-
gaged position.
CHECK OPERATOR PRESENCE
SYSTEM
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.
CHECK REVERSE OPERATION (ROS)
SYSTEM
When the engine is running with the ig-
nition switch in the engine "ON" position
and the attachment clutch is engaged,
any attempt by the operator to go into
reverse should shut off the engine.
When the engine is running with the
ROS "ON" Position
Engine "ON" Position
(Normal Operating)
ignition switch in the ROS "ON" position
and the attachment clutch is engaged,
any attempt by the operator to shift into
reverse should NOT shut off the engine.
BLADE CARE
For best results mower blades must be
kept sharp. Replace bent or damaged
blades.
A CAUTION: Use only a replacement
blade approved by the manufacturer of
your tractor. Using a blade not approved
by the manufacturer of your tractor is
hazardous, could damage your tractor and
void your warranty.
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.
Trailing Mandrel As__embly
Edge Up_ Blade
Cente
Lock
If bolt needs replacing, replace only with
approve bolt shown in the Repair Parts.
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.
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