Replacing The Grass Deflector; Adjusting The Idler Pulley - Toro 30551 Operator's Manual

blade, add a shim, Part No. 3256-24, between
spindle housing and bottom of the cutting unit.
Continue checking alignment of blades and
adding shims until tips of 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, be
sure the traction pedal is in neutral position, the
PTO lever in OFF position, shut engine OFF
and remove the key from the switch. Block the
cutting unit to prevent it from falling
accidentally.
2. Remove two capscrews, locknuts and springs
securing deflector mounts to pivot brackets.
Figure 23
1. Deflector mounts
2. Pivot brackets
3. Pivot springs
3. To remove the pivot brackets, remove carriage
bolts and nuts.
4. Reinstall pivot brackets on top of discharge
opening with carriage bolts and nuts. Head of
carriage bolts must be on inside of the cutting
unit.
5. Position deflector mounts on pivot brackets and
secure parts together with capscrews, locknuts
and springs. Both locknuts must face each other.
Tighten the locknuts until they are flush against
deflector pivots.
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6. Lift deflector and allow it to drop to check
spring tension. Deflector must be held firmly in
full downward position by spring tension.
Correct if necessary.

Adjusting the Idler Pulley

The idler pulley applies force against the belt so
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 54 to 68
Nm of torque on the large nut, which applies force
against the belt If the idler is not adjusted to these
specifications, adjustment is necessary.
1. Position the machine on a level surface, lower
the cutting unit, engage the parking brake, be
sure the traction pedal is in neutral position, the
PTO lever in OFF position, shut engine OFF
and remove the key from the switch.
2. Release and unhook latches securing center
cover to top of the cutting unit. Remove cover
from the cutting unit.
3. Loosen two nuts securing idler plate in place.
Using a socket and torque wrench, tighten the
idler adjusting nut to 47 N•m.
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3
Figure 24
1. Idler adjusting nut
2. Nuts (2)
3. Idler plate
4. Hold the torque against the belt and tighten the
two nuts so idler plate is held securely in place.
Release the idler adjusting nut. Install the cover
and secure the latches.
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