Clarke CA90 32T, Руководство по обслуживанию, Страница: 22 / 62

Recovery System 22 Service Manual – CA90 32T
Recovery System
Functional Description
The recovery system on the CA90 32T is made up of a 3-stage vacuum motor, various pipes and hoses, and a
ball-float assembly. The “working air” from the vacuum motor passes through the recovery tank standpipe,
the ball-float assembly, then down to the squeegee. This working air pulls dirty water from the squegee
up through the vacuum (pick-up) hose, through the pick-up tube adapter, and into the recovery tank. The
water then falls to the bottom of the tank, while the air returns to the vacuum motor.
The ball-float assembly is designed so that when the recovery tank is full, the ball will seal off the standpipe,
preventing dirty water from entering the vacuum motor. The ball-float is the only means of protection to
keep water from entering the vacuum motor.
Note: It is very important that the ball-float assembly is present and in good working order.
The vacuum motor will be damaged if water and/or foam gets past the ball-float.
Circuit Description
The vacuum motor circuit operation is very simple. When the switch is turned to ON, the coil of the vacuum
solenoid is energized which allows full B+ power to flow through the main solenoid terminals to the vacuum
motor. The circuit is protected by a 35 amp circuit breaker.
Circuit Diagram
B+
B-
B-
Vacuum Circuit
Breaker
Vacuum Switch
Key Switch
B-
Vacuum Solenoid
Vacuum Motor
B+