Replacing The Grass Deflector; Adjusting The Idler Pulley - Toro 30553 Operator's Manual

MEASURE FROM
BLADE TIP TO LEVEL
SURFACE
Figure 34
7. Rotate the blades to the "C" position, measure, and note
the distance measured (Fig. 33 and 34).
8. Compare the measurements at various positions. All
dimensions must be equal within 1/4 in. (6 mm) from
any 2 adjacent blades. The difference between the
dimensions of all 3 blades must not exceed 3/8 in.
(10 mm). If the difference exceeds specifications,
proceed to step 9.
9. Remove the capscrews, flat washers, and locknuts from
the outer spindle in the area where the shims must be
added. To raise or lower the blade, add a shim, Part No.
3256-24, between the spindle housing and bottom of the
cutting unit. Continue checking the alignment of the
blades and adding shims until the tips of the blades are
within the required dimension.

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 capscrews, locknuts, and springs securing
the deflector mounts to the pivot brackets (Fig. 35).
Figure 35
1. Deflector mounts
2. Pivot brackets
3. To remove the pivot brackets, remove the carriage bolts
and nuts (Fig. 35).
1
2
3
3. Pivot springs
23
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.
5. Position the deflector mounts on the pivot brackets and
secure the parts together with the capscrews, 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. Tension on the
belt requires 40 to 50 ft.-lb. (54 to 68 N m) of torque on the
large nut, which applies force against the belt. 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 40–50 ft.-lb. (54 to 68 N m) (Fig. 36).
2
3
2
Figure 36
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.
1
3. Idler adjusting nut