Adjusting The Blade Brake; Replacing The Grass Deflector - Toro 39988 Operator's Manual

Commercial walk-behind mower
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Figure 62
1. Blade
Installing the Blades
1. Install the bolt, curved washer, and blade. Select the
proper number of spacer(s) for the height-of- cut,
and slide the bolt into the spindle (Figure 60).
Important: The curved part of the blade must
point upward toward the inside of the mower to
ensure proper cutting.
2. Install the remaining spacer(s) and secure them with
a thin washer and a nut (Figure 60).
3. Torque the blade bolt to 75-80 ft-lb (101-108 N-m).

Adjusting the Blade Brake

1. Disengage the PTO, turn the ignition key to off, and
remove the key.
2. Wait for all moving parts to stop before leaving the
operating position and then set the parking brakes.
3. If necessary, adjust the spring mounting bolts so that
the blade brake pad rubs against both sides of the
pulley groove (Figure 63).
4. Adjust the nut at the end of the blade brake rod until
there is 1/8-3/16 inch (3 mm -5 mm) between the
nut and spacer (Figure 63).
5. Engage the blades. Ensure the blade brake pad no
longer contacts the pulley groove.
Figure 63
1. Spring mounting bolts
2. Blade brake pad
2. Balancer
3. 1/8-3/16 inch (3mm-5mm)

Replacing the Grass Deflector

An uncovered discharge opening could allow
the lawn mower to throw objects in the
operator's or bystander's direction and result in
serious injury or death. Also, contact with the
blade could occur.
Never operate the lawn mower with the grass
deflector removed unless you install a cover
plate, a mulch plate, or a grass chute and
catcher.
1. Remove the locknut, bolt, spring and spacer holding
the deflector to the pivot brackets (Figure 64).
Remove damaged or worn grass deflector.
1. Bolt
2. Spacer
3. Locknut
4. Spring
2. Place spacer and spring onto grass deflector. Place
the L end of spring behind deck edge.
Note: Make sure the L end of spring is installed
behind deck edge before installing the bolt as shown
in Figure 64.
3. Install bolt and nut. Place the J hook end of spring
around grass deflector (Figure 64).
47
Figure 64
5. Spring installed
6. Grass Deflector
7. L end of spring, place
behind deck edge before
installing bolt
8. J hook end of spring

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