84Service Manual – SC6000
30 - Solution System
Functional Description
The SC6000 solution tank is incorporated directly
into the main body of the machine. A series of 4 oat
switches serves as a level indicator for the amount
of solution in the tank. The outlet of the tank has
a manual shutoff valve so that components can be
serviced without solution owing out of the tank. Just
downstream from the shutoff is a lter element to
prevent debris from entering other components of the
system.
The supply hose leads to the scrub deck, where the
solution solenoid meters uid delivery. The supply
hose is a specially molded tube that also contains
ttings for the optional EcoFlex detergent inlet and
the option pump outlet for either wash hose or dust
control pumps.
Shutoff Valve
A bidirectional shutoff valve permits the solution
ow to be shutoff, directed toward the scrub deck, or
directed toward the drain hose. The ow is off when
the handle is perpendicular to the body. When the
handle is parallel to the body, it could be pointed
either way, so it is best to conrm the desired
position.
Solution Solenoid
The solution solenoid is located downstream from
the solution lter, and activates to allow solution to
ow to the scrub deck. To prevent pooling of excess water on the oor when the machine is stationary, the
solenoid output from the controller is disabled when the wheel drive is not active. The rate of solution ow is
controlled by cycling the solution solenoid on and off at varying duty cycles.
Solution Level Sensors
Even though the solution level sensor is a single physical component, it is internally comprised of 4
independent reed switches and oats. Each oat has a magnetic ring that activates the reed switch when
it is in proximity to the switch. All 4 switches have a common ground, but they each have their own
independent return wire back to the main controller.
As an assembly, the oats and reed switches operate in the Normally-Closed conguration (uid-wise), but
the reed switches themselves are congured as Normally-Open if the oat was completely missing. If no uid
is present to raise the oat, then the oat’s magnetic ring lines up with the reed switch, and the switch is
active and closed.
Wash Hose Option
The wash hose option uses an on-demand uid pump at the rear of the machine to drive pressurized water
to the exible wash hose. The pump itself monitors the output for uid ow by pressure drop, and activates
when the operator uses water. The inlet to this pump is in the solution hose, but upstream from the solution
solenoid. The Dust Guard option cannot be added to a machine that has wash hose.
Level
Sensors
Fill Cap
Solution
Tank
Solution
Solenoid
Supply
Hose
Drain
Hose
Filter
Shutoff
Valve
EcoFlex
System
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