PowerBoss Nautilus Hi-Dump PB45HDSL, Service Booklet

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Description of the main scrub brush floor pressure settings (Using the dual proportional valve driver):
The dual controller uses an “A” prefix for the optional side brush settings and a “B” prefix for the Main
brush settings.
The dual floor brush pressure controller or dual proportional valve driver (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 at the piston-end of the cylinder
(provided by the reduction valve) 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 parameters.
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