Tractor, Brake operation, Blade care – Craftsman 917.276240 User Manual

Page 20: Blade removal

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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 “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 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

ignition switch in the engine "ON" posi­

tion and the attachment clutch engaged,

any attempt by the operator to shift into
reverse should shut off the engine.

ROS "ON" Position Engine "ON" Position

(Normal Operating)

• When the engine is running with the ig­

nition switch in the ROS "ON" position and

the attachment clutch engaged, any at­
tempt 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.

BLADE REMOVAL

1. Raise mower to highest position to al­

low access to blades.

NOTE:

Protect your hands with gloves

and/or wrap blade with heavy cloth.
2. Remove blade bolt by turning counter­

clockwise.

3. Install new or resharpened blade with

stamped "THIS SIDE UP" facing deck
and mandrel assembly.

IMPORTANT:

To ensure proper assembly,

center hole in blade must align with star
on mandrel assembly.
4. Install and tighten blade bolt securely

(45-55 Ft. Lbs. torque).

IMPORTANT:

Special blade bolt is heat

treated.

Star

Mandrel

CenterX

Assembly

Blade Bolt

(Special)——^

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.

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