Cutting Unit Maintenance; Pivoting (Tilting) The Front Cutting Unit To The Upright Position; Pivoting The Front Cutting Unit Down; Adjusting The Cutting Unit Pitch - Toro Groundsmaster 4000 Operator's Manual

Cutting Unit Maintenance

Pivoting (Tilting) the Front
Cutting Unit to the Upright
Position
Note:
Although not needed for normal maintenance
procedures, you can pivot (tilt) the front cutting unit to
an upright position.
1. Raise the front cutting unit slightly off the floor,
engage the parking brake, shut off the engine,
and remove the key.
2. Remove the hairpin cotter and clevis pin
securing the deck-transport latch to the latch
plate and pivot the latch toward the rear of the
deck.
3. Remove the hairpin cotter and clevis pin
securing the height-of-cut chains to the rear of
the cutting unit.
4. Start the engine, slowly raise the front cutting
unit, shut off the engine, and remove the key.
5. Grasp the front of the cutting unit and lift it to
an upright position.
6. Hold the cutting unit upright, fit the cable end
over the pin on the cutting unit lift arm, and
secure it with the hairpin cotter
Figure 120
1. Cable
(Figure 120).
g020681
2. Pin
Pivoting the Front Cutting
Unit Down
1. With the help of another person, hold the cutting
unit upright, remove the hairpin cotter securing
the cable end, and remove the cable from the
pin.
2. Pivot (tilt) the cutting unit downward.
3. Store the cable under the operator's platform.
4. Sit on the seat, start the engine, and lower the
cutting unit until it is slightly off the floor.
5. Shut off the engine, wait for all parts to stop
moving, and remove the key.
6. Secure the height-of-cut chains to the rear of
the cutting unit.
7. Pivot the transport latch upward into position
and secure it with the clevis pin and cotter pin.
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 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 cutting unit 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 Front Cutting Unit
Pitch
1. Loosen the jam nuts at 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 cutting unit and attain the correct
mower-deck pitch.
3. Tighten the jam nuts.
76
(Figure 121).