Toro 74225 Operator's Manual page 46

7. If adjustment is required, loosen the fixed idler on
right support plate and move up or down in adjustment
slot. To relieve belt tension lift up on spring loaded
idler.
1
Figure 62
1. Fixed Idler
8. Check belt tension again. The center bolt of spring
loaded idler must be between the two alignment holes
in left support plate (Fig 61). Adjust, if necessary, and
tighten all hardware securely.
9. If the fixed idler contacts the end of the adjustment
slot and more belt tension is required, a small change
to lengthen the push arms can be made (Fig. 63).
10. To lengthen, loosen jam nut and rotate ball joint
counterclockwise, one turn at a time. Adjust each side
the same amount.
2
m–3746
2. Adjustment slot
46
3
1
Figure 63
1. Push arm
2. 15 in. (381 mm) nominal
11. Rotate the belt guide, on rear of the mower, so it is
1/8–1/4 in. (3–7 mm) away from the vertical side of
the PTO belt (Fig. 64).
1
3
Figure 64
1. Belt guide
2. PTO drive belt
1
2
m–3740
3. Jam nut
4. Ball joint
2
3. 1/8–1/4 in. (3–7 mm)