Murray 22" Front Drive User Manual download pdf (Page 21)

MAINTENANCE

21

F-050442L

BLADE SERVICE

WARNING: Before you inspect

the blade or the blade adapter,

disconnect the wire to the spark

plug. If the blade hits an object, stop the

engine. Disconnect the wire to the spark

plug. Check the unit for damage.

Frequently check the blade for wear or dam-

age such as cracks. Frequently check the bolt

that holds the blade. Keep the bolt tight. If the

blade hits an object, stop the engine. Discon-

nect the wire to the spark plug. Check the

blade adapter for damage. Check for a bent or

damaged blade, a badly worn blade, or other

damage. Before you operate the unit, dam-

aged parts must be replaced with factory re-

placement parts. For safety, replace the blade

every two years. Keep a sharp edge on the

blade. A blade that is not sharp will cause the

ends of the grass to become brown. Remove

the blade as follows.

HOW TO REMOVE THE BLADE

WARNING: Before you remove

the blade, disconnect the wire

to the spark plug. The blade has

sharp edges. When you hold the blade,

use gloves or cloth material to protect

your hands.

1. Drain the fuel tank.

2. Lift the side of the mower that has the

muffler or spark plug.

3. Use a piece of wood to keep the blade

from rotating.

4. Remove the bolt that holds the blade with

a 9/16” (14mm) wrench.

Blade

Adapter

Blade

Belleville

Washer

Bolt

Figure 23

Belleville Washer

Bolt

Blade Adapter

Blade

5. Check the blade according to the ”Blade

Service” instructions. Replace a badly

worn or damaged blade with a factory re-

placement blade.

6. Mount the blade with the curved edges to-

ward the housing. If the blade is upside

down, the blade will not cut correctly and

can cause an accident.

7. Fasten the blade with the original washer

and bolt. Make sure the outside rim of the

Belleville washer is toward the blade

(Figure 23).

8. Tighten the bolt that holds the blade to a

torque of 30 foot pounds.

WARNING: Always keep the bolt

that holds the blade tight. A loose

bolt or blade can cause an acci-

dent.

HOW TO SHARPEN THE BLADE

WARNING: Vibration is the re-

sult if the blade is not correctly

balanced. A blade that is dam-

aged with cracks can break and cause an

accident.

1. Sharpen the blade two times a year or ev-

ery 25 hours.

2. If the blade is on the unit, do not sharpen.

Remove the blade according to the in-

structions in ”How To Remove The Blade”.

3. Clean the blade with a brush, soap, and

water. Check the blade. Look for cracks,

nicks, or other damage. Replace a blade

that is badly worn, bent, or damaged with

a factory replacement blade.

4. Sharpen the blade with a file. Make sure

you keep the original beveled cutting edge

(Figure 24).

(Continued following page)

Ground

Blade is balanced

when parallel to

the ground.

Screwdriver

Blade

File

Figure 24

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 31 32

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