Replacing The Pump Drive Belt - Toro 74412 Operator's Manual

4. Loosen the fixed idler arm and adjust it to relieve the
belt tension on the fixed idler pulley (Fig. 56).
3
2
1
Figure 56
1. Fixed idler arm
2. Square hole
3. Fixed Idler pulley
5. Remove the old belt.
6. Install the new belt through the belt guide and on the
pulleys (Fig. 56).
7. Insert a ratchet with a short extension or a breaker bar
into the square hole in the fixed idler arm (Fig. 57).
2
Figure 57
1. Ratchet with short
extension or breaker bar
5
6
m–7711
4
4. Mower belt
5. Belt guide
6. Spring-loaded idler pulley
1
m–7719
2. Square hole
42
8. To increase the belt tension, rotate the ratchet or breaker
bar counterclockwise to move the fixed idler arm until
you feel increased resistance and the spring-loaded idler
pulley stops moving.
Note: Do not increase the belt tension beyond the point
where the fixed idler arm stops.
9. While holding the belt in tension, tighten the 2 bolts
that secure the fixed idler arm.
10. Remove the ratchet or breaker bar from the square hole
in the fixed idler arm.
11. Install the belt covers the outside spindles.

Replacing the Pump Drive Belt

Check the pump drive belt for wear after every
50 operating hours.
1. Remove the mower belt first; refer to Replacing the
Mower Belt on page 41.
2. Remove the bolt from the clutch stop and unplug the
clutch electrical wire (Fig. 58).
3
2
1
6
m–7718
Figure 58
1. Belt
2. Clutch electrical wire
3. Clutch stop
3. Pull the spring loaded idler to the side.
4. Remove the traction belt from the engine and the
hydraulic pump pulleys (Fig. 58).
5. Install the new belt around the engine and the hydraulic
pump pulleys (Fig. 58).
6. Pull the spring-loaded idler to the side and align the
belt.
7. Release the pressure on the spring loaded idler
(Fig. 58).
8. Install the mower belt.
4
5
4. Bolt
5. Clutch
6. Idler