Checking And Replacing The Pump Drive Belt - Toro 74237CP Operator's Manual

1. Center bolt
2. Alignment hole
5. If adjustment is required, loosen the idler plate to
adjust it (Figure 48).
6. Insert a ratchet or breaker bar into the square hole in
the idler plate to adjust the tension (Figure 48).
7. To increase belt tension, rotate the ratchet or breaker
bar to move the fixed idler until you feel increased
resistance and the spring-loaded idler pulley stops
moving (Figure 48).
Note: Do not increase the belt tension beyond the
point where the fixed idler arm stops.
8. While holding the belt tension, tighten the idler plate
bolts that secure the idler plate (Figure 48).
1. Rachet with short
extension or breaker
bar
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 49).
Figure 47
3. Left support plate
4. Spring loaded idler
Figure 48
2. Idler plate with Square
hole
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 48).
11. If the 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 50).
1. Fixed idler
Checking and Replacing the
Pump Drive Belt
Service Interval: Every 50 hours—Check the pump
drive belt.
1. Check the pump drive belt for wear.
2. Pull the spring loaded idler down and remove
traction belt from the engine and hydro pump
pulleys (Figure 51). Remove belt between pulleys.
38
Figure 49
4. Idler pulley arm
5. Belt
6. Rubber bumper
Figure 50
2. Adjustment slot