Adjusting The Idler Pulley - Toro 30555 Operator's Manual

the carriage bolts must be on the inside of the mower
deck.
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 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
the large nut is required. If the idler is not adjusted to these
specifications, adjust it.
1. Move the machine on a level surface, lower the mower
deck, engage the parking brake, put the traction pedal
into the N
EUTRAL
O position, shut off the engine, and remove the key
FF
from the ignition.
2. Release the latch and loosen the bolt securing the
center cover.
3. Remove the center cover from the top of the mower
deck.
4. Loosen the 2 nuts securing the idler plate in place.
Using a socket and torque wrench, tighten the idler
adjusting nut to 24 to 41 N∙m (25 to 30 ft-lb) as shown
in Figure 46.
Figure 45
3. Pivot brackets
4. Spring
position, the PTO lever into the
1. Idler plate
2. Nut
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 mower deck.
7. Engage the latch and tighten the bolt to the secure the
cover.
22
Figure 46
3. Idler adjustment