Checking And Correcting Mismatch Of Blades - Toro 30555 Operator's Manual

Checking and Correcting
Mismatch of Blades
If one cutting blade cuts lower than the others, correct them
as follows:
1. Lower the cutting unit onto a level surface, engage the
parking brake, put the traction pedal in neutral, the
PTO lever in the Off position, shut the engine off,
and remove the ignition key. Make sure that the tire
pressure is equal on all tires.
2. Raise the height-of-cut to the 102 mm (4 inches)
position; refer to Adjusting the Height-of-Cut.
3. Rotate the blades so that the tips line up with one
another. The tips of the adjacent blades must be within
3 mm (1/8 inch) of each other. If the tips are not
within 3 mm (1/8 inch) of each other, proceed to step
10 and add shims between the spindle housing and
bottom of the cutting unit.
4. Check to make sure that the front height-of-cut pins
are resting properly on the frame cushions. If the pins
are not resting properly, place a shim or shims under
the cushion to raise it for proper alignment.
5. Position all 3 blades in the A position (Figure 24) and
measure from the level surface to the bottom of the tip
end of each blade (Figure 25).
B
A
A
C
1. Measure from blade tip to a level surface.
6. Note the measurement attained at A, rotate the blades
to the B position (Figure 24), measure the distance
of all of the blades to the level surface, and note the
dimensions (Figure 25).
7. Rotate the blades to the C position, measure, and note
the distance measured (Figure 24 and Figure 25).
8. Compare the measurements at various positions. All
dimensions must be equal within 6 mm (1/4 inch)
from any 2 adjacent blades. The difference between
B
B
C
A
Figure 24
1
Figure 25
the dimensions of all 3 blades must not exceed 10 mm
(3/8 inch). If the difference exceeds specifications,
proceed to step 9.
9. Remove the bolts, flat washers, and locknuts from
the outer spindle in the area where the shims must be
added. To raise or lower the blade, add a shim, Part
No. 3256-24, between the spindle housing and bottom
of the cutting unit. Continue checking the alignment of
the blades and adding shims until the tips of the blades
are within the required dimension.
10. Equalize the side-to-side measurements as follows:
A. Cutting units usually operated at 25 to 51 mm (1
C
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1. Lynch pin
B. Transfer one thrust washer from the top side
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C. If the cutting unit is operated at the 51 mm to 102
D. Transfer one thrust washer from the lower side
18
to 2 inches) height-of-cut should have the low side
of the cutting unit raised. Remove the lynch pin
securing the castor wheel on the low end (Figure
26) and remove the castor assembly.
1
2
Figure 26
2. Thrust washers (as
required)
of the castor shaft to the lower side, install the
castor assembly, and compare the blade height of
all blades; refer to steps 3 through 7. Continue
adding thrust washers if the height still does not
meet the requirements.
mm (2 to 4 inches) height-of-cut, lower the high
side of the cutting unit. Remove the lynch pin of
the castor at the high end of the unit and remove
the castor assembly (Figure 26).
of the castor shaft to the top side, install the
assembly, and compare the blade height of all of
the blades; refer to steps 3 through 7. Repeat the
procedure if the height still does not meet the
requirements.
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