Adjusting The Mower Belt Tension For 72In Mowers Only; Replacing The Pto Drive Belt - Toro 74266CP Operator's Manual

Adjusting the Mower Belt
Tension for 72in Mowers Only
Service Interval: After the first 8 hours
Important: To ensure proper mower belt tension,
which will result in a longer belt life, check the
mower belt tension after the first 8 hours of use and
8 hours after each belt change.
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. Adjust the mower deck to the 3 inch (76mm)
height-of-cut position.
4. Measure the spring length (Figure 70). If the spring
length is between 10 and 10-1/4 inches (25.4 and
26.0 cm), from post to post, no adjustment is needed.
5. Loosen the bolts holding the idler plate (Figure 70).
6. Insert a ratchet or breaker bar into the square hole in
the idler plate to adjust the tension (Figure 70).
7. Rotate the ratchet or breaker bar to move the idler
plate until the idler spring is between 10 and 10-1/4
inches (25.4 and 26.0 cm) from post to post as
shown in Figure 70.
8. While holding the belt tension and spring length,
tighten the idler plate bolts that secure the idler plate
(Figure 70).
1. Belt guide install at a 45
degree angle
2. Idler spring length
(between 10 and 10-1/4
inches (25.4 and 26.0 cm))
3. Idler plate
Figure 70
4. Ratchet or breaker bar
5. Idler plate bolt

Replacing the PTO Drive Belt

Service Interval: Every 50 hours—Check the PTO
drive belt.
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. Loosen the front engine panel knobs and remove
the panel (Figure 71).
1. Knob
4. Remove the spring from the idler arm (Figure 72).
5. Remove the clutch stop bracket.
6. Remove the old PTO drive belt.
7. Install the PTO drive belt around the clutch pulley
and the gearbox pulley (Figure 72).
8. Intall the rubber clutch stop.
9. Install the spring to the idler arm (Figure 72).
50
Figure 71
2. Front engine panel