Replacing The Blade-Drive Belt - Toro 30605 Operator's Manual

1. Belt
2. Eye bolt
3. Extension spring

Replacing the Blade-Drive Belt

Service Interval: Every 800 hours
The blade-drive belt, tensioned by the spring-loaded idler
pulley, is very durable. However, after many hours of use,
the belt will show signs of wear. Signs of a worn belt are
squealing when belt is rotating, blades slipping when cutting
grass, frayed edges, burn marks, and cracks. Replace the belt
if any of these conditions are evident.
1. Lower the cutting unit to the shop floor.
2. Remove the belt covers from the top of the cutting unit
and set the covers aside.
3. Loosen the eye bolt allowing the removal of the
extension spring (Figure
4. Loosen the flange nut securing the stop bolt to the
mounting tab.
Note: Back off the nut enough to allow the idler arm
to pass by the stop bolt
pulley away from the belt to release belt tension.
Note: If you ever remove the stop bolt from the
mounting tab, ensure that it is installed in the hole that
aligns the stop bolt head with the idler arm.
5. Remove the bolts securing the hydraulic motor to the
cutting unit (Figure
Figure 65
4. Belt guide
5. Flange nut
6. Stop bolt
65).
(Figure 65). Move the idler
66).
1. Hydraulic motor
6. Lift the motor off the cutting unit and lay it on top
of the cutting unit.
7. Remove the old belt from around the spindle pulleys
and idler pulley.
8. Route the new belt around the spindle pulleys and idler
pulley assembly.
9. Position the hydraulic motor on the cutting unit after
routing the belt around the pulleys.
Note: Ensure that the belt is positioned on the spring
side of the belt guide
10. Mount the motor to the cutting unit with the bolts
previously removed.
11. Connect the extension spring
bolt and tension the belt as follows:
•
When properly tensioned, the extension
spring (hook to hook) measurement should be
approximately 8.9 cm ± 0.63 cm (3.50 ± 0.25 inch
(inside).
•
Once you achieve the correct spring tension,
adjust the stop bolt (carriage bolt) until there is
approximately 0.32 cm ± 0.152/0.000 cm (0.125 +
0.060/- 0.000 inch) clearance between the head of
the bolt and the idler arm.
48
Figure 66
2. Mounting bolts
(Figure 65).
(Figure 65) to the eye