Service manual

MAINTENANCE 4

4.3 SHARPENING BLADES _____________________________________________________________________

1. Place a wooden block between the blade and mower housing to

stop the blade from moving. To remove blade, turn screw holding

blade counterclockwise

2. When dressing or sharpening the blade, do not follow the

original pattern of grind as shown in (A). Grind new cutting

edges at an angle as shown in (B).

If the maximum total loss of the blade reaches 1/2 in. (13 mm),

do not sharpen further, replace blade.

3. Make sure an equal amount of material is removed from both

sides of blade to prevent having an unbalanced blade. An

unbalanced blade will cause excessive vibration and may

damage the mower.

4. Use a blade balancer (JAC 5016) to check the blade after

sharpening.

5. Identify the three clockwise rotation (D) and four counter-

clockwise rotation (E) blades. The blades for clockwise rotation

are installed on the left front deck motor, the outside left wing

deck motor, and the inside right wing deck motor. (Rotation is

determined by normal motor rotation viewed from top of deck).

6. Install blades so cutting edges (C) face the direction of rotation

as shown in Figure 4C. Air vane of blade must face in toward

deck housing.

Torque center mounting screw holding blade to 75 ft. lb. (102

Nm).

Figure 4B

Figure 4C

WARNING

The mower blades can develop sharp edges. Use caution

whenever servicing and handling.

WARNING

Resharpening the blade beyond the allowable 1/2 in. (13 mm)

may allow blade tip to break off and be thrown from the mower.

Such an incident can cause very serious injury to bystanders and/

or property damage.

HR024

1/2” (13 mm)

Maximum

HR024

Bottom view of front deck in its

service position

Bottom view of side decks

raised to their transport position.

Left Side

Right Side