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Figure 75
1. Spindle
2. Sail Area of Blade
3. Torque the blade bolt to 115-150 N-m (85-110 ft-lb).
Correcting Mower Deck
Mismatch
If the cut is uneven across the mower swath, correct it as
follows:
1. Position the machine on a level surface on the shop
floor.
2. Set the cutting unit to the desired height of cut, move
the throttle lever to the Slow position, stop the engine,
set the parking brake, and remove the ignition key.
3. Check and adjust front and rear tractor tire pressure;
refer to Checking Tire Pressure.
4. Check for bent blades.
5. Remove the covers from the top of the cutting units.
6. Rotate the blade on each spindle until the ends face
forward and backward.
7. Measure from the floor to the front tip of the cutting
edge.
8. Adjust the jam nuts securing the deck yokes/chains to
the mower deck until the mower deck is level.
3. Anti-scalp plate
4. Blade Bolt
1. Chain
2. Yoke
Adjusting the Mower Deck
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 approximately 8 mm (5/16
inch). That is the back of the blade plane is 8 mm (5/16 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, move
the throttle lever to the Slow position, stop the engine,
set the parking brake, and remove the ignition key.
3. Rotate the center blade so that it points straight
forward.
4. Using a short ruler, measure from the floor to the front
tip of the blade.
5. Rotate the same blade tip to the rear and measure from
the floor to the tip of the blade at the rear of the deck.
6. Subtract the front dimension from the rear dimension
to calculate the blade pitch.
7. Adjust the jam nuts securing the rear deck yokes/chains
to raise the rear of the deck so that the blade pitch is
set to 5/16 inch (8 mm) (Figure 77).
56
Figure 76
3. Jam nut
4. Mower deck
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