Adjusting The Drive Belts; Replacing The Pump Drive Belt - Toro 74268 Operator's Manual

7. Install the new drive belt around the clutch pulley, the
adjustable idler pulleys, the spring loaded idler pulley,
and the front three stacked pulleys (Fig. 74).
8. Adjust the belt tension; refer to Adjusting the Drive
Belts, page 51.
9. Install the mower belt around the mower pulleys and
the top pulley of the three stacked pulleys
(Fig. 71 and 74).
2
4
1
6 5
Figure 74
1. Drive belt
2. Clutch
3. Spring loaded idler pulley

Adjusting the Drive Belts

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.
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 (Fig. 75 and 76).
Left spring measurement: 5–3/4 +/– 1/8 inch
(14.6 +/– 0.3 cm) (Fig. 75).
Right spring measurement: 5–1/2 +/– 1/8 inch
(14.0 +/– 0.3 cm) (Fig. 75).
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 (Fig. 76).
5. Relieve the pressure on the spring–loaded idler pulley
(Fig. 76).
4
3
3
m–7404
4. Adjustable idler pulley
5. Three stacked pulleys
6. Mower belt
51
6. Position the adjustable pulley lower in the slot and
tighten the nut (Fig. 76).
7. Check to make sure the coils of the spring on the
spring–loaded idler pulley have the correct
measurement (Fig. 75).
8. Repeat as necessary on the opposite side of the
machine.
1
Figure 75
1. Spring/Spring coils
2. Left spring
measurement—5–3/4+/–
1/8 inch (14.6+/– 0.3 cm)
3
2
Figure 76
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
(Fig. 42).
2,3
m–7589
3. Right spring
measurement—5–1/2 +/–
1/8 inch (14.0+/– 0.3 cm)
5 4
1
m–7416
4. Right adjustable pulley
5. Right spring loaded idler
pulley