PowerBoss Nautilus Hi-Dump PB45HDSL, Service Booklet

Page: 54 / 117

54
Setting the main scrub brush floor pressure (Using the dual proportional
valve driver)
The dual floor brush pressure controller (located on the left front face of the operator console) provides three separate
brush floor pressure forces for the main scrub brushes by controlling the hydraulic pressure output of the SV4
proportional reduction valve located on the main hydraulic manifold at port 6.1. and provides three separate brush floor
pressure forces for the side scrub brush by controlling the hydraulic pressure output of the SV9 proportional reduction
valve located on the SSB hydraulic manifold at port 6.2.
For the main scrub brushes this variable output pressure is applied to the rod-end of the scrub head lift cylinder. This
variable pressure is balanced against the steady 450 psi provided by the reduction valve (above) to achieve the desired
scrub brush floor pressure.
For the side scrub brush this variable output pressure is applied to the piston-end of the side scrub head lift cylinder. This
variable pressure is balanced against the steady 450 psi provided by the reduction valve (above) to achieve the desired
scrub brush floor pressure.
The controller has a left control knob, a right control knob, and an information screen.
The right control knob scrolls between the various setting titles.
The left control knob provides input settings.
Description of the adjustable parameters:
BP1 – The low brush floor pressure setting.
BP2 – The medium brush floor pressure setting
BP3 – The high brush floor pressure setting
BP4 – The BP4 setting is not used. (Any number input will have no effect.)
BJ9 – Jog. This is used to simulate a P1 – P3 setting and its effect on the brush pressure in real time. (This does not
require an input setting.)
BUP - The ramp time required for the output signal to increase by 1 amp.
Bdn - The ramp time required for the output signal to decrease by 1 amp.
DF – Dither frequency. (Dither is an oscillation feature that eliminates slip stick in the operation of the solenoid.)
di – Display orientation
SA – Save settings