Replacing The Pump Drive Belt; Adjusting The Belt Guides - Toro 74310 Operator's Manual

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 52.
1. Tension Arm
2. Loosen 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 PTO lever and check the alignment.
16. Check and adjust the belt guides as stated in Adjusting
the Belt Guides (page 43).

Replacing the Pump Drive Belt

1. Stop the machine and move the speed control lever to
the neutral position.
2. Disengage the PTO, engage the parking brake, stop the
engine, and wait for all moving parts to stop.
3. Remove the PTO Belts; refer to Replacing the PTO
Belts (page 42).
4. Pull spring idler or remove spring to relieve pump drive
belt tension.
5. Remove the old belt.
6. Route new belt onto sheaves as shown in the decal
located on the back of the left drive shield (Figure 53).
Figure 52
1. Pump Drive Belt
2. Pump
3. Idler
7. Install PTO Belts as stated in Replacing the PTO Belts
(page 42).

Adjusting the Belt Guides

1. Stop the machine and move the speed control lever to
the neutral position.
2. Disengage the PTO, engage the parking brake, stop the
engine, and wait for all moving parts to stop.
3. With the engine off, engage the PTO lever.
4. Adjust belt guides as shown in Figure 54.
1. 3 mm (1/8 inch)
2. 11 mm (7/16 inch)
3. 3 mm (1/8 inch) Clearance 6. 8 mm (5/16 inch)
43
Figure 53
4. Pump
5. Idler
6. Engine
Figure 54
4. Rotate wireform guide to
center belts in guide.
5. 6 mm (1/4 inch)