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

D. Transfer one thrust washer from the lower side
of the castor shaft to the top side, install the
assembly, and compare the blade height of all of
the blades; refer to steps 3 through 7. Repeat the
procedure if the height still does not meet the
requirements.
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.
Figure 27
3. Pivot brackets
4. Spring

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 25 to 30
ft-lb (34 to 41 N-m) of torque on the large nut, which
applies force against the belt. As the belt wears and
loosens, 20 to 25 ft-lb (27 to 34 N-m) of torque on 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 and unhook the latches securing the center
cover to the top of the cutting unit. Remove the
cover from the cutting unit.
3. Loosen the 2 nuts securing the idler plate in place.
Using a socket and torque wrench, tighten the idler
adjusting nut to 25-30 ft-lb (24-41 N-m) (Figure 28).
1. Idler plate
2. Nuts (2)
4. 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. Install the cover and
secure the latches.

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.
20
Figure 28
3. Idler adjustment