Toro 31598, Operator'S Manual

Page: 62 / 84

Figure 92
1. Height of cut chain 3. Hair pin cotter
2. Clevis pin
4. Start the engine, slowly raise the front cutting unit,
and stop the engine. Remove the ignition key.
5. Wedge a 2 x 4 between the rear of the deck and the
machine (Figure 93).
Figure 93
1. 2 x 4
Pivoting the Front Cutting Unit
Down
1. With the help of another person holding the front of
the cutting unit, remove the 2 x 4.
2. Sit on the seat, start the engine, and lower the 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. Connect the damper assembly and secure it with the
retainer clip.
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 .300 inch (7.5
mm). That is the back of the blade plane is .300 inch
(7.5 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. Make sure the winglets are level to the front deck
and the front deck is level side to side.
Adjusting the Front Cutting Unit
1. Rotate the 2 outer front blades and the winglet blades
so that they point straight forward (Figure 94).
Figure 94
1. Use one of these blades
for measuring the front
blade height 2. Use one of these blades
for measuring the rear
blade height
2. Using a short ruler, measure from the floor to
the front tip of the front blade and record this
dimension.
3. Measure from the floor to the back tip of the winglet
blade and record this dimension.
4. Subtract the front dimension from the rear
dimension to calculate the blade pitch.
5. Loosen the jam nuts on the top or bottom of the
height-of-cut chain U-bolt (Figure 95).
Note:
Loosen or tighten the height of cut chain
nuts equally so the deck remains level side to side.
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