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

2. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
3. Remove the belt covers over the outside
spindles.
4. Loosen the fixed idler arm and adjust it to
relieve the belt tension on the fixed idler pulley
(Figure 48).
Figure 48
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 (Figure 48).
7. Insert a ratchet with a short extension or a
breaker bar into the square hole in the fixed
idler arm (Figure 49).
Figure 49
1. Ratchet with short
extension or breaker bar
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.
4. Mower belt
5. Belt guide
6. Spring-loaded idler pulley
2. Square hole
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 over 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.
2. Remove the bolt from the clutch stop and
unplug the clutch electrical wire (Figure 50).
3. Pull the spring loaded idler to the side.
4. Remove the traction belt from the engine and
the hydraulic pump pulleys (Figure 50).
5. Install the new belt around the engine and the
hydraulic pump pulleys (Figure 50).
6. Pull the spring-loaded idler to the side and
align the belt.
7. Release the pressure on the spring loaded idler
(Figure 50).
8. Install the mower belt.
Figure 50
1. Belt
2. Clutch electrical wire
3. Clutch stop
38
4. Bolt
5. Clutch
6. Idler