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The proper belt tension will be attained when a force of
45 lb. on a used belt (90 lb. on a new belt) is applied to the
idler pulley (Fig. 82) when sliding it into the belt.
Figure 82
1. Idler pulleys
Adjusting the Cutting Unit
Pitch
Measuring the Cutting Unit Pitch
Cutting unit pitch is the difference in height-of-cut from the
front of the blade plane to the back of the blade plane. Toro
recommends a blade pitch of 1/4 in. (6 mm). That is the
back of the blade plane is 1/4 in. (6 mm) higher than the
front.
1. Position the machine on a level surface on the shop
floor.
2. Set the cutting unit to the desired height-of-cut.
3. Rotate 1 blade so that it points straight forward.
4. Using a short ruler, measure from the floor to the front
tip of the blade. Rotate the blade tip to the rear and
measure from the floor to the tip of the blade.
5. Subtract the front dimension from the rear dimension to
calculate the blade pitch.
Adjusting the Front Cutting Unit
1. Loosen the jam nuts on the top or bottom of the
height-of-cut chain u-bolt (Fig. 83).
2. Adjust the other set of nuts to raise or lower the rear of
the cutting unit and attain the correct cutting unit pitch.
3. Tighten the jam nuts.
1
2
1. Height-of-cut chain
Adjusting the Side Cutting Units
1. Remove the tensioning cap from the spindle shaft and
slide the spindle out of the castor arm (Fig. 84).
Reposition the shims, as required, to raise or lower the
castor wheel until the cutting unit has the correct pitch.
2. Install the tensioning cap.
4
1
1. Castor wheel
2. Tensioning cap
3. Spacers
51
1
Figure 83
2. u-bolt
2
3
5
Figure 84
4. Shims
5. Axle mounting holes
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