Tennant t500, Service Information Manual

Page: 102 / 146

102 T500 9015504 01-2018
SERVICE
CHECKING / ADJUSTING THE CYLINDRICAL
SCRUB BRUSH PATTERN
NOTE: This procedure must be completed using a
new set of brushes. Performing procedure with worn
brushes may result in uneven brush wear and / or
shortened brush life.
1. Apply chalk to a fl at, level surface.
NOTE: The main wire harness must be disconnected
from the transaxle motor so the machine remains
stationary during the brush pattern test.
2. Turn off ec-H2O system (if equipped).
3. Turn off the solution fl ow.
4. Adjust the speed dial to the lowest setting.
5. Position the scrubber so the brushes are over the
chalked area.
6. Lower the scrub head into the chalked area on the
fl oor.
7. Place the directional lever into the reverse position.
8. Firmly hold the machine so it does not move and
squeeze the bail handle to activate the scrub
brushes. Hold the bail handle for 20 seconds and
then release the bail handle.
Note: Parking brake can be used to hold machine in
place if machine is equipped with the optional parking
brake.
9. Raise the scrub head and pull the machine away
from the pattern test area.
10. Observe the brush pattern. If the brush pattern is
the same width across the entire length of each
brush and both brushes are the same width, no
adjustment is necessary.
11. If the brush patterns are tapered, proceed to the
following steps to adjust the patterns.
12. Unfasten yellow latch and remove the idler plate
assembly from the scrub head.