Replacing The Grass Deflector; Adjusting The Idler Pulley; Replacing The Drive Belt - Toro 30555 Operator's Manual

E. If the height is within the specified dimension,
install the lynch pin, set the height-of-cut to the
proper height, and resume operation.

Replacing the Grass Deflector

1. Position the machine on a level surface, raise the
cutting unit, engage the parking brake, put the traction
pedal in neutral, the PTO lever in the Off position,
shut the engine off, and remove the ignition key. Block
the cutting unit to prevent it from accidentally falling.
2. Remove the 2 bolts, locknuts, and springs securing the
deflector mounts to the pivot brackets (Figure 27).
3. To remove the pivot brackets, remove the carriage
bolts and nuts (Figure 27).
4. Install the pivot brackets on top of the discharge
opening with the carriage bolts and nuts. The head of
the carriage bolts must be on the inside of the cutting
unit.
1. Bolt
2. Locknuts
5. Position the deflector mounts on the pivot brackets
and secure the parts together with the bolts, locknuts,
and springs. Both locknuts must face each other.
Tighten the locknuts until they are flush against the
deflector pivots.
6. Lift the deflector and allow it to drop to check the
spring tension. The deflector must be held firmly in the
full downward position by the spring tension. Correct
it if necessary.

Adjusting the Idler Pulley

The idler pulley applies force against the belt so that power
can be transmitted to the blade pulleys. If the idler is not
tensioned against the belt with sufficient force, maximum
power will not be transmitted to the pulleys. Initial tension on
a new belt requires 34 to 41 N-m (25 to 30 ft-lb) of torque on
the large nut, which applies force against the belt. As the belt
wears and loosens, 27 to 34 N-m (20 to 25 ft-lb) of torque on
Figure 27
3. Pivot brackets
4. Spring
the large nut is required. If the idler is not adjusted to these
specifications, an adjustment is necessary.
1. Position the machine on a level surface, lower the
cutting unit, engage the parking brake, put the traction
pedal in neutral, the PTO lever in the Off position,
shut the engine off, and remove the ignition key.
2. Release the latch and loosen the bolt securing the
center cover.
3. Remove the center cover from the top of the cutting
unit.
4. Loosen the 2 nuts securing the idler plate in place.
Using a socket and torque wrench, tighten the idler
adjusting nut to 24-41 N-m (25-30 ft-lb) (Figure 28).
1. Idler plate
2. Nuts (2)
5. Hold the torque against the belt and tighten the 2 nuts
so that the idler plate is held securely in place. Release
the idler adjusting nut.
6. Install the cover to the top of the cutting unit.
7. Engage the latch and tighten the bolt to the secure the
cover.

Replacing the Drive Belt

The blade drive belt, tensioned by the adjustable idler, is very
durable. However, after many hours of use, the belt will show
signs of wear. Signs of a worn belt are: squealing when belt
is rotating, blades slipping when cutting grass, frayed edges,
burn marks, and cracks. Replace the belt if any of these
conditions are evident.
1. Position the machine on a level surface, lower the
cutting unit, engage the parking brake, put the traction
pedal in neutral, the PTO lever in the Off position,
shut the engine off, and remove the ignition key.
2. Release the latches and loosen the bolts securing the
covers.
3. Remove the covers from the top of the cutting unit.
4. Loosen the 2 nuts securing the idler plate in place and
remove the old belt from the pulleys.
19
Figure 28
3. Idler adjustment