Correcting The Mower Quality Of Cut - Toro 74549 Operator's Manual

1. Sail Area of Blade
2. Blade
Sharpening the Blades
1. Use a file to sharpen the cutting edge at both ends of
the blade (Figure 83). Maintain the original angle. The
blade retains its balance if the same amount of material
is removed from both cutting edges.
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a blade
balancer (Figure 84). If the blade stays in a horizontal
position, the blade is balanced and can be used. If the
blade is not balanced, file some metal off the end of
the sail area only (Figure 82). Repeat this procedure
until the blade is balanced.
1. Blade
Installing the Blades
1. Install the blade onto the spindle shaft (Figure 85).
Figure 82
3. Curved washer
4. Blade Bolt
Figure 83
Figure 84
2. Balancer
Important: The curved part of the blade must be
pointing upward toward the inside of the mower to
ensure proper cutting.
2. Install the spring disk and blade bolt. The spring disk
cone must be installed toward the bolt head (Figure 85).
Torque the blade bolt to 85-110 ft-lb (115-150 N-m).
1. Sail Area of Blade
2. Blade
3. Spring Disk
Correcting the Mower Quality
of Cut
If one deck blade cuts lower than the other, correct as follows.
Note: Tire air pressure is critical in these procedures. Make
sure the rear tires have correct pressure.
1. Disengage the PTO and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position. Disconnect the spark plug wire(s) from the
spark plug(s).
3. Adjust the tire pressure in the rear tires to 12-14 psi
(83-97 kPa).
4. Check that the blades and spindle shafts are not bent.
Refer to Checking for Bent Blades.
5. Set the height-of-cut to the 3 inch (7.6 cm) position.
Refer to Adjusting the Height-Of-Cut in Operation.
6. Perform the steps in the following procedures in order.
Checking the Mower Deck Side-to-Side
Height
1. Adjust the rear tire pressure.
54
Figure 85
4. Blade Bolt
5. Cone Towards Bolt Head