Tennant 6200D, Service Manual

Page: 86 / 272

SWEEPING
3-12
6200D 330395 (8--99)
CHECKING AND ADJUSTING 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 and lower the main brush for 15 to 20
seconds while keeping a foot on the brakes
to keep the machine from moving.
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.
4. Raise the main brush.
5. Drive the machine off the test area.
6. Observe the width of the brush pattern. The
proper brush pattern width is 50 to 75 mm
(2 -- 3 in).
The brush taper is factory set and should not
need adjustment unless parts of the brush
system have been replaced.
If the main brush pattern is tapered,
more than 15 mm (0.5 in) on one end
than the other, adjust the taper as
follows:
1. Loosen the brush shaft bearing bracket
mounting bolt and the idler arm securing
head.
2. Allow the brush to operate and float into
position for approximately 30 seconds.
3. Tighten the adjustment bolt and idler arm
securing knob.
4. Check the main brush pattern and readjust
as necessary.