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Service Manual – SC1500
Scrub System
Functional Description
The Scrub System includes the Scrub Deck, Brush or Pad Motor, Brush Motor Contactor (K2 relay) and
Deck Actuator Assembly. The Scrub System uses either disc scrub brushes or REV
™
deck pads depending on
the scrub deck configuration. A 24-volt electric motor powers the brush/pad.
The scrub deck has four vertical positions:
• The scrub deck is in the fully-retracted (up) position when the machine is in the transport mode (no
scrubbing or vacuuming).
• The vacuum-only position lowers the scrub deck so the attached squeegee contacts the floor, but the
brush/pad is raised slightly above the floor. This position is used for wet vacuuming of wastewater from
the floor with no scrubbing.
• The “normal” scrub pressure position lowers the scrub deck so the brush/pad contacts the floor with
normal scrub pressure.
• The “extra” scrub pressure position lowers the scrub deck to its extension limit so the brush/pad contacts
the floor with greater than normal scrub pressure.
The SC1500 can be configured with two different scrub decks:
• The
20D Scrub Decks
have a 20” brush plate assembly to
accommodate a variety of disc brushes. The 20D models can
also be used with several grades of pads by using the optional
pad holder. The brush is driven by a Brush Motor connected to
a 90-degree Gearbox.
• The
20R REV
™
Scrub Decks
have a 20” pad driver for use with
REV
™
deck pads only. The pad is driven directly by a 24 VDC
Motor.
Note that the two types of Scrub Decks use different
Motors
, but
use the same
Deck Actuator Assembly
and mounting hardware.
20D Scrub Deck
20R REV
™
Scrub Deck