Clarke MA50 15B, Руководство по обслуживанию

Страница: 56 / 87

Scrub System
55
Service Manual – MA50 15B
Scrub System
Functional Description
The Clarke MA50 15B uses a single 1/3 horse power motor to turn a belt driven pulley at 150 rpm. The MA50
15B has a “pivoting head” design, so the brush pressure is limited to the weight of the front of the machine. The
only variation in brush pressure is the weight of the water in the tanks. The brush pressure is otherwise not
adjustable.
The brush/pad driver attaches to the driven pulley using (3) square lugs. The brush motor spins counter-
clockwise, and will only operate if the power switch is ON, the brush switch is ON, and the operating triggers are
engaged.
Tension on the drive belt is kept constant by a spring loaded tensioner.
Circuit Description
The brush motor receives power from the control PCB through a circuit breaker. B+ and B - are constantly
supplied to the control PCB unless the on-board charger is plugged in, or the batteries are disconnected. When
the power switch and brush switch are in the ON position on the switch PCB, and the operating triggers are
pulled, 24 VDC is appied to the brush motor.
Component Locations
•
Power Switch
•
Brush Switch
•
Switch PCB
• Operating Triggers
• Brush Circuit Breaker
•
Control PCB
• Brush Motor
•
Driven Pulley
• Drive Belt
•
Belt Tension Pulley
•
Belt Tension Bracket and Spring