MAINTENANCE
71
7200 330040 (9--05)
PRE--SWEEP CYLINDRICAL BRUSH
Check the brush taper every 50 hours of machine
operation for maximum brush life and best
sweeping performance.
The cylindrical brush should be replaced if large
amounts of bristles are missing, or if the
remaining bristle length is less than 10 mm
(0.38 in).
CHECKING AND ADJUSTING CYLINDRICAL
BRUSH PATTERN
1. Apply chalk (or another material that will not
easily blow away), to a smooth, level section
of the floor.
2. Drive the machine so the Pre--Sweep
assembly is centered in the chalk.
3. Set the parking brake.
4. Lower the Pre--Sweep assembly in the
chalked area. Slowly press down on the
directional pedal until the Pre--Sweep
brush begins to sweep. Allow the machine to
sweep in the same place for 15 to 20
seconds.
NOTE: If chalk or other material is not available,
allow the brush to spin on the floor for two
minutes. A polish mark will remain on the floor.
5. Raise the Pre--Sweep assembly and move
the machine away from the chalked area.
Turn the machine power off.