Toro ProCore Operator's Manual page 42

A. Loosen the lower nut on the eye bolt and thread
it to the end of the bolt (Figure 56).
Figure 56
1. Eye bolt
B. Insert a socket wrench into the square hole in
the idler arm and rotate the wrench upward
(Figure 55).
Important: Do not rotate the wrench upward
too far because damage to the idler arm
extension spring may occur. If the spring
stretches to more than 3.75 inches, replace
the spring. Measure the spring from inside
loop to inside loop as shown in Figure 57.
Figure 57
1. 3.75 inches
4. To increase the spring tension thus increasing the
belt tension, shorten the eye bolt height by loosening
the top eye bolt nut and tightening the lower nut
(Figure 55 & Figure 58).
2. Lower nut
1. Eye bolt
5. Install the belt cover.
Jack shaft to Chopper Belt
To check the belt tension proceed as follows:
1. Remove the belt cover (Figure 59).
1. Jack shaft to chopper belt
cover
2. Jack shaft to chopper belt
3. Idler pulley
2. Loosen the nut on the idler pulley (Figure 59).
3. Insert the hook end of belt tensioning tool into
the hole above the idle pulley (Figure 59). Rest the
curved bottom of the tool on the idler pulley.
4. Insert the drive of a 1/2 inch torque wrench into the
hole in the belt tensioning tool (Figure 59).
5. Rotate the tool toward you until the torque of 50
inch-pounds in achieved, then, while holding the
torque, tighten the idler pulley nut (Figure 59).
6. Remove the torque wrench and tensioning tool.
7. Install the belt cover.
42
Figure 58
2. Eye bolt height
Figure 59
4. Nut
5. Belt tensioning tool