Regular Maintenance

Sharpening the Mower Blade

CAUTION

Thrown Objects Hazard

A

• Always wear safety eye protection when grinding.

1.

Sharpen the mower blades with grinder, hand file,

 

 

 

or electric blade sharpener.

 

B

2.

Sharpen the mower blade by removing an equal

 

 

Figure 24. Sharpening the Mower Blade

 

amount of material from each end of the mower

 

A. Mower Blade Bevel

 

blade.

 

B. Mower Blade Cutting Edge

3.

Keep the original bevel (A, Figure 24) when

 

 

 

 

 

grinding. DO NOT change the mower blade bevel.

 

 

4.

The mower blade should have a maximum 1/64”

 

 

 

(0,40 mm) cutting edge (B) or less.

 

 

 

 

 

 

 

 

5.

Balance the mower blades before installing.

 

 

Balancing the Mower Blades

CAUTION

Reproduction

A

 

Avoid injury! Keep mower blades balanced.

orf

 

 

 

 

• An unbalanced mower blade can create

 

 

 

excessive vibration and damage the unit or

 

 

 

cause mower blade failure.

Not

 

 

 

 

 

Figure 25. Balancing the Mower Blade

 

1. Clean the mower blade to remove any dried grass

 

or other debris.

 

 

A. Nail

 

2. See Figure 25. Put the mower blade n a nail in

 

 

a vise and turn the mower blade to the horizontal

 

 

position.

 

 

 

 

3. Check the balance of the mower blade. If either

 

 

end of the mower blade moves downward,

 

 

 

sharpen the heavy end until the mower blade is

 

 

B

balanced. See Sharpening the Mow r Blad s for

 

 

 

proper sharpening instructions.

 

 

 

 

4. Repeat the process until the mower blade r mains

 

 

in the horizontal position.

 

 

 

 

Reinstalling the Mower Blades

 

 

 

 

1. Reinstall each mower blade with the air lifts

 

 

A

 

D

 

pointing up towards the mower deck as shown in

 

Figure 26. Secure with the mower blade mounting

 

 

bolt and flat washer (A & B, Figure 26) and torque

 

 

to 70 ft. lbs (94 Nm).

 

 

 

 

2.If there are no flats on the spindle shaft, wedge a wooden block between the mower blade and the

mower deck housing to keep the mower blade

Figure 26. Tightening the Mower Blade for

from turning.

Installation

 

 

A. Mower Blade Mounting Bolt

 

B. Flat Washer

 

C. Mower Blade Air Lift (Points Up For Installation)

 

D. 4 X 4 Wooden Block

30

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