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Adjusting 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. Use a blade pitch of 6 mm (1/4 inch). That is
the back of the blade plane is 6 mm (1/4 inch) higher
than the front.
1.
Park the machine on a level surface.
2.
Engage the parking brake.
3.
Shut off the engine and remove the key.
4.
Set the cutting unit to the desired height-of-cut.
5.
Rotate 1 blade so that it points straight forward.
6.
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.
7.
Subtract the front dimension from the rear
dimension to calculate the blade pitch.
8.
Loosen the jam nuts on the bottom of the
height-of-cut rods
1. Height-of-cut
9.
Rotate the height-of-cut rods to raise or lower
the rear of the cutting unit and attain the correct
cutting unit pitch.
10.
Tighten the jam nuts.
(Figure
11).
Figure 11
2. Jam nut
Adjusting the Skids
Mount the skids in the lower position when operating
in height of cuts higher than 64 mm (2-1/2 inches) and
in the higher position when operating in height of cuts
lower than 64 mm (2-1/2 inches).
Note:
When the skids become worn, you can switch
the skid to the opposite sides of the mower, flipping
them over. This will allow you to use the skids longer
before replacing them.
1.
Disengage the PTO and engage the parking
brake.
2.
Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Loosen the screw at the front of each skid
(Figure
12).
4.
Remove the flange-head bolts and nuts from
each skid.
5.
Move each skid to the desired position and
secure them with the flange-head bolts and nuts
(Figure
12).
Note:
Only use the top or center sets of holes
to adjust the skids. The bottom holes are used
when switching sides on a Guardian mower, at
which time they become the top holes on the
other side of the mower.
g012232
1. Screw
2. Flange-head bolt
6.
Torque the screw at the front of each skid to 9 to
11 N⋅m (80 to 100 in-lb).
13
Figure 12
3. Skid
4. Nut
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