Advance acoustic 56514925, Service Manual

Page: 181 / 260

Scrub System 181 Service Manual – Advance 7765 / Nilfisk CR1500
The
Normal Rotation Brush (4)
and
Reverse Rotation Brush (3)
solenoid
valves are part of the
Main Control
Valve
. The
Main Control Valve
is
mounted on the underside of the
machine, in front of and to the left
of the scrub deck.
When the
Normal Rotation Brush
(4)
solenoid is energized, it closes
to direct the oil flow in and out of
Ports 3
and
4
on the
Main Control
Valve
. The direction of oil flow is
determined by the position of the
Reverse Rotation Brush (3)
solenoid
valve which controls the direction
of brush rotation.
Main Control Valve
(bottom view - shown mounted in assembled machine)
Port 3
Port 4
Main
Control Valve
Main Control Valve
(top view - shown while machine is being assembled)
Reverse
Rotation
Brush (3)
Normal
Rotation
Brush (4)