Mower Maintenance
Pivoting (Tilting) the Front
Cutting Unit Upright
Note:
Although not needed for normal maintenance
procedures, the front cutting unit can be pivoted (tilted) to an
upright position. Should you desire to tilt the cutting unit,
proceed as follows:
1.
Raise the center and wing cutting units slightly off of
the floor, set the parking brake, and stop the engine.
Remove the ignition key.
2.
Remove the hairpin cotter securing dampers to lift
arms (Figure 77). Pivot damper toward deck housing.
Figure 77
1.
Damper
2.
Hair pin cotter
3.
Remove the hairpin cotter and clevis pin securing the
height-of-cut chains to the rear of the cutting unit
(Figure 78).
Figure 78
1.
Height-of-cut chain
2.
U-bolt
4.
Start the engine and slowly raise the center cutting unit.
5.
Slowly raise each wing cutting until the center of gravity
shifts and the deck starts to rotate into the upright
position. Stop the engine and remove the ignition key.
Pivoting the Front Cutting Unit
Down
1.
Slowly lower wing cutting units until the center of
gravity shifts and the center cutting unit rotates
downward.
2.
Sit on the seat, start the engine, and lower the center
cutting unit until it is slightly off of the floor.
3.
Secure the height-of-cut chains to the rear of the
cutting unit.
4.
Pivot dampers upward into position and secure with
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 1/4 inch (6 mm). That is the
back of the blade plane is 1/4 inch (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 (Figure 79).
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.
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