MAINTENANCE
6550D 330330 (3--99)
74
TO CHECK AND ADJUST MAIN BRUSH
PATTERN
1. Apply chalk, or some other material that will
not blow away easily, to a smooth, level
floor.
2. Raise the side brush and main brush and
position the main brush over the chalked
area.
3. Start the main brush.
4. Lower the main brush for 15 to 20 seconds
while keeping a foot on the brakes to keep
the machine from moving. This will lower the
rotating main brush.
NOTE: If chalk or other material is not available,
allow the brushes to spin on the floor for two
minutes. A polish mark will remain on the floor.
5. Raise the main brush.
6. Stop the main brush.
7. Drive the machine off the test area.
8. Observe the width of the brush pattern. The
proper brush pattern width is 50 to 65 mm
(2.0 to 2.5 in).
9. To increase the width of the main brush
pattern, turn the main brush down pressure
knob counter-clockwise.
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