Replacing The Pump Drive; Belt - Toro 74280TE Operator's Manual

2. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
Note: Measure only the spring coils.
3. Measure the length of the spring. Check
to make sure the coils of the spring on the
spring-loaded idler pulley measures as listed
below (Figure 58 and Figure 59).
• Left spring measurement: 5-3/4 ± 1/8 inch
(14.6 ± 0.3 cm) (Figure 58).
• Right spring measurement: 5-1/2
± 1/8 inch (14.0 ± 0.3 cm) (Figure 58).
4. If the spring does not have the correct
measurement, loosen the nut holding the
adjustable idler pulley so it can move up and
down in the slot (Figure 59).
5. Relieve the pressure on the spring-loaded idler
pulley (Figure 59).
6. Position the adjustable pulley lower in the slot
and tighten the nut (Figure 59).
7. Check to make sure the coils of the spring on
the spring-loaded idler pulley have the correct
measurement (Figure 58).
8. Repeat as necessary on the opposite side of
the machine.
Figure 58
1. Spring/Spring coils
2. Left spring
measurement-5-3/4±
1/8 inch (14.6± 0.3 cm)
3. Right spring
measurement-5-1/2 ±
1/8 inch (14.0± 0.3 cm)
Figure 59
1. Left adjustable pulley
2. Left spring loaded idler
pulley
3. Back of the machine

Replacing the Pump Drive

Belt

Check pump drive belt for wear after every
50 hours of operation.
1. Tilt the seat forward and remove the front
engine panel.
2. Pull the spring loaded idler down and remove
the traction belt from the engine and hydro
pump pulleys (Figure 60). Remove the belt
between the pulleys.
3. Install the new belt around the engine and
hydro pump pulleys (Figure 60).
4. Pull the spring loaded idler down and align it
below the traction belt. Release the pressure
on the spring loaded idler (Figure 60).
Figure 60
1. Spring loaded idler pulley
48
4. Right adjustable pulley
5. Right spring loaded idler
pulley
2. Pump drive belt