Pivoting The Front Cutting Unit Down; Adjusting The Cutting Unit Pitch - Toro 31598 Operator's Manual

Figure 92
1. Height of cut chain
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.
3. Hair pin cotter
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 7.5 mm (0.300 inch). That is the
back of the blade plane is 7.5 mm (0.300 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. 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
1. Use one of these blades
for measuring the front
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
Note: Loosen or tighten the height of cut chain nuts
equally so the deck remains level side to side.
6. Adjust the other set of nuts to raise or lower the rear of
the cutting unit and attain the correct cutting unit pitch.
7. Tighten the jam nuts.
59
(Figure 94).
Figure 94
2. Use one of these blades
for measuring the rear
blade height
(Figure 95).