Solution System
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Service Manual – CA90 32T
Solution System
Functional Description
The solution system is gravity feed. Meaning there is no pump for the solution. The solution system is fed
by (2) tubes which are connected to hose barbs at the bottom rear of the solution tank. The solution then
passes through a solution shut-off valve, and the solution filter.
The solution is then “held” by the solution valve. The solution valve is normally closed, and is energized
when the solution switch is in the ON position, and the safety trigger switch is engaged. Once the solution
valve is open, the solution continues to a hose “T”, and the solution is split between the Right and Left hose
barbs located above the brush drive plates.
The solution valve is mechanically adjustable, and the amount of solution flow is controlled by a cable
connected between the solution valve, and the solution control knob. Because the solution is gravity feed,
the solution flow will diminish as the solution tank becomes empty. It is normal for the flow to decrease, and
the flow to go more to the right brush as the tank nears empty.
Circuit Description
The Solution circuit is very simple. When the Trigger switch is engaged, and the Solution Switch is ON, the
Solution Valve (Solenoid) will open, allowing solution to flow to the brush deck
Circuit Diagram
B+
B-
B-
Solution
Solenoid
Solution Switch
Key Switch
Trigger Switch