Adjusting The Mower Belt Tension - Toro 74282 Operator's Manual

Adjusting the Mower Belt
Tension
1. Disengage the PTO, move the motion control levers
to the neutral locked position, and set the parking
brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Raise the mower to the transport position.
Important: Check the amount of twist in the
belt between the pulleys. Make sure it is only
what is specified in Figure 49.
Important: Check and make sure the belt is
installed into both the front and rear belt guides
(Figure 51).
4. Check the belt tension. The spring loaded idler
center bolt needs to be near the top alignment hole
in left support plate (Figure 51).
Figure 51
1. Center bolt
2. Alignment hole
5. If adjustment is required, loosen the mower idler
plate and adjust it (Figure 52).
6. Insert a ratchet or breaker bar into the square
hole in the mower idler plate to adjust the tension
(Figure 52).
7. To increase belt tension, rotate the mower idler plate
until resistance is felt and rotation stops. Do not go
past when it stops (Figure 52).
8. Tighten the idler plate bolts (Figure 52).
3. Left support plate
4. Spring loaded idler
1. Mower idler plate
2. Square hole
9. Check the distance from the rubber stop and the
arm of the spring loaded idler pulley when the idler
plate is tightened. It needs to be 0 to 1/4 inch (0 to
6 mm) from the rubber stop (Figure 53).
1. Spring loaded idler pulley
2. Top alignment hole
3. 0 to 1/4 inch gap (0 to 6
mm)
10. Adjust the belt tension and the idler plate, if
necessary, and tighten all hardware securely
(Figure 52).
11. If the mower idler plate contacts the end of the
adjustment slot and more belt tension is required, a
small change to the right side fixed idler can create
more belt tension adjustment (Figure 54).
41
Figure 52
3. Ratchet or breaker bar
4. Idler plate bolt
Figure 53
4. Idler pulley arm
5. Belt
6. Rubber bumper