Sharpening the Mower Blade

CAUTION

Avoid injury! Mower blades are sharp.

Always wear gloves when handling the mower blades.Always wear safety eye protection when grinding.

Regular Maintenance

A

B

1.

Sharpen the mower blades with grinder, hand file, or

 

Figure 29. Sharpening the Mower Blade

 

 

electric blade sharpener.

 

 

 

 

 

 

A. Mower Blade Bevel

 

2.

Sharpen the mower blade by removing an equal amount

B. Mower Blade Cutting Edge

 

 

of material from each end of the mower blade.

 

 

 

3.

Keep the original bevel (A, Figure 29) 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

 

 

 

 

Avoid injury! Keep mower blades balanced.

 

 

A

 

• An unbalanced mower blade can create excessive

 

 

 

 

vibration and damage the unit or cause mower blade

 

 

 

failure.

 

orf

 

 

 

 

 

1.

Clean the mower blade to remove any dried grass or

 

Figure 30. Balancing the Mower Blade

 

 

other debris.

 

 

 

 

 

 

A. Nail

 

2.

See Figure 30. Put the mower blade on a nail in a vise

 

 

 

 

and turn the mower blade to the horizontalNotposition.

 

 

 

3.

Check the balance of the mower blade. If either end

 

 

 

 

of the mower blade moves downward, shar n the

 

 

 

 

heavy end until the mower blade is balanc d. S

 

 

 

 

Sharpening the Mower Blades for prop r sharp ning

 

B

 

instructions.

 

 

 

4.

Repeat the process until the mower blade remains in the

 

 

 

horizontal position.

Reproduction

 

Reinstalling the Mower Blades

 

 

 

 

 

1.

Reinstall each mower blade with the air lifts pointing up

 

A

 

towards the mower deck as shown in Figure 31.

 

D

 

 

36” Models: Make sure the blade is firmly seated

 

 

 

 

in the blade saddle. Secure with the mower blade

 

 

 

 

mounting bolt and flat washer (A & B, Figure 31) and

 

 

 

 

torque to 70 ft. lbs (94 Nm).

 

 

 

 

 

48” Models: Secure with the mower blade mounting

 

 

 

bolt and flat washer (A & B, Figure 31) and torque to 70

Figure 31. Tightening the Mower Blade for

 

 

ft. lbs (94 Nm).

 

 

 

2.

If there are no flats on the spindle shaft, wedge a

 

Installation

 

 

A. Mower Blade Mounting Bolt

 

 

wooden block between the mower blade and the mower

 

 

 

 

deck housing to keep the mower blade from turning.

B. Flat Washer

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

 

 

D. 4 X 4 Wooden Block

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