Adjusting The Cutting Unit Pitch; Servicing The Castor Arm Bushings - Toro 30411 Operator's Manual

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 Center Cutting Unit
1. Loosen the jam nuts on the top or bottom of the
height-of-cut chain u-bolt (Fig. 78).
2. Adjust the top set of nuts to raise or lower the rear of
the cutting unit and attain the correct cutting unit pitch.
3. Tighten the lower jam nuts.
2
Figure 78
1. Height-of-cut chain
Adjusting the Wing Cutting Units
1. Remove the capscrews and nuts securing the castor arm
to the castor fork (Fig. 79).
1
2. u-bolt
49
2. Reposition the shims, as required, to raise or lower the
castor wheel until the cutting unit has the correct pitch.
3. Install the capscrews and nuts.
2
Figure 79
1. Castor arm
2. Castor fork
Servicing the Castor Arm
Bushings
The castor arms have bushings pressed into the top and
bottom of the tube and after many hours of operation, the
bushings will wear. To check the bushings, move the castor
fork back and forth and from side to side. If the castor
spindle is loose inside the bushings, the bushings are worn
and must be replaced.
1. Raise the cutting unit so that the wheels are off of the
floor. Block the cutting unit so that it cannot
accidentally fall.
2. Remove the tensioning cap, spacer(s), and thrust washer
from the top of the castor spindle.
3. Pull the castor spindle out of the mounting tube. Allow
the thrust washer and spacer(s) to remain on the bottom
of the spindle.
1
3
3. Shims