Belt Maintenance; Inspecting The Belts; Replacing The Pto Belts - Toro 74312 Operator's Manual

Belt Maintenance

Inspecting the Belts

Service Interval: Every 40 hours
1. Stop the machine and move the speed-control
lever to the N
EUTRAL
2. Disengage the PTO, engage the parking brake,
shut off the engine, and wait for all moving parts
to stop.
3. Tilt the hopper up and check the pump and PTO
drive belts for wear, cracking, or contamination.
Note:
The belts are spring tensioned and no
adjustment is necessary unless you replace the
belts.

Replacing the PTO Belts

1. Stop the machine and move the speed-control
lever to the N
EUTRAL
2. Disengage the PTO, engage the parking brake,
shut off the engine, and wait for all moving parts
to stop.
3. With the engine off, engage the PTO lever, then
remove the hairpin cotter and clevis pin at the
bottom of the PTO-brake band.
4. Rotate the brake band upward and out of the
way of the belts keeping clear of the belt drive.
5. Disengage the PTO lever.
6. Loosen belt guides A and B
7. Remove the belts.
8. Route the new belts onto the pulleys as shown
in Figure 49.
Figure 49
1. Idler
2. Belt guide B
3. PTO belt
4. Jackshaft
9. Engage the PTO lever.
position.
position.
(Figure 49).
5. Engine
6. Belt guide A
7. Blower
10. Rotate the brake band down into the original
position.
11. Install the clevis pin and hairpin cotter to secure
the brake band.
12. Engage the PTO lever.
13. Loosen the jam nuts and adjust the linkage until
the top of the idler arm is aligned with the bottom
of the notch on the tension arm as shown in
Figure 50.
1. Tension arm
2. Loosen the jam nuts.
3. When PTO is engaged, align top of idler arm with bottom of
notch on tension arm, as shown.
4. Idler arm
14. Tighten the jam nuts and disengage the PTO
lever.
15. Engage the PTO lever and check the alignment.
16. Check and adjust the belt guides as stated in
Adjusting the Belt Guides (page
g006836
47
Figure 50
48).
g006837