Replacing The Pump Drive; Belt - Toro 74251 Operator's Manual

Figure 56
1. Mower idler plate
2. Square hole
6. Insert a ratchet or breaker bar into the square
hole in the mower idler plate to adjust the
tension (Figure 56).
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 56).
8. Tighten the idler plate bolts (Figure 56).
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 57).
3. Ratchet or breaker bar
4. Idler plate bolt
Figure 57
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 56).
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 58).
Figure 58
1. Fixed Idler

Replacing the Pump Drive

Belt

Check pump drive belt for wear after every
50 hours of operation.
1. Pull the spring loaded idler down and remove
traction belt from the engine and hydro pump
45
4. Idler pulley arm
5. Belt
6. Rubber bumper
2. Adjustment slot