Adjusting The Mower-Deck Pitch; Servicing The Caster-Arm Bushings - Toro 30609 Operator's Manual

Adjusting the Mower-Deck
Pitch
Measuring the Mower-Deck Pitch
Mower-deck pitch is the difference in height of cut
from the front of the blade plane to the back of the
blade plane. Use s a blade pitch of 8 to 11 mm (5/16
to 7/16 inch). That is the back of the blade plane is 8
to 11 mm (5/16 to 7/16 inch) higher than the front.
1. Position the machine on a level surface on the
shop floor.
2. Set the mower deck to the desired height of cut.
3. Rotate a blade to point straight forward.
4. Using a short ruler, measure from the floor to
the front tip of the blade.
5. Rotate the blade tip to the rear and measure
from the floor to the tip of the blade.
6. Subtract the front dimension from the rear
dimension to calculate the blade pitch.
Adjusting the Center Mower-Deck
Pitch
1. Loosen the jam nuts on the top or bottom of the
height-of-cut-chain U-bolt
2. Adjust the other set of nuts to raise or lower the
rear of the mower deck and attain the correct
mower-deck pitch.
3. Tighten the jam nuts.
Figure 100
1. U-bolt
(Figure 100).
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2. Height-of-cut chain
Adjusting the Wing Mower Decks
Service Interval: Every 800 hours
1. Remove the tensioning cap from the spindle
shaft and slide the spindle out of the castor arm
(Figure 101). Reposition the shims, as required,
to raise or lower the castor wheel until the cutting
unit has the correct pitch.
1. Tensioning cap
2. Spacers
3. Shims
2. Install the tensioning cap.
Servicing the Caster-Arm
Bushings
The caster arms have bushings pressed into the
top and bottom of the tube and after many hours of
operation, the bushings develop wear. To check the
bushings, move the caster fork back and forth and
from side to side. If the caster spindle is loose inside
the bushings, the bushings are worn and must be
replaced.
1. Raise the mower deck so the wheels are off the
floor and block the mower deck so it cannot fall.
2. Remove the tensioning cap, spacer(s), and
thrust washer from the top of the caster spindle.
3. Pull the caster spindle out of the mounting tube.
Note:
Keep the thrust washer and spacer(s) on
the bottom of the spindle.
4. Insert a pin punch into the top or bottom of the
mounting tube and drive the bushing out of the
tube (Figure 102).
Note:
Also drive the other bushing out of the
tube. Clean the inside of the tubes to remove
dirt.
71
Figure 101
4. Axle mounting holes
5. Castor wheel
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