PowerBoss Nautilus Hi-Dump PB45HDSL, Service Booklet, Page: 110 / 117

Adjusting the Nautilus reverse sensing switch
Purpose:
The lowered rear squeegee can be damaged by being forced into the floor when the vehicle is moving in
reverse.
To prevent squeegee damage a reverse sensing switch causes the rear squeegee to raise whenever the
vehicle moves in reverse.
When the vehicle is stopped or resumes forward motion the rear squeegee automatically lowers back to
the floor
Operation:
The neutral sensing switch is a whisker-type switch located below the directional control pedal.
The switch is activated by the directional control pedal arm.
Adjustment:
NOTE: the heel end of the directional control pedal, when in neutral, must be set to 3/4 inch above the
operator compartment floor before performing this adjustment.
1. Slightly loosen the neutral switch mounting fasteners so that the switch can be repositioned by
hand.
The adjustment can be monitored by listening to the sound of the switch as it opens and closes.
2. Adjust the switch body so that that the switch is already activated when the directional control
pedal is in neutral and stays activated when the pedal is pushed in the forward direction. The
switch should close immediately upon moving the pedal into the reverse direction. It is
important that only a very small amount of reverse pedal movement is required to close the
switch.
It is important that the switch reacts quickly in reverse otherwise the rear squeegee will not raise when
moving the vehicle in reverse at low speed.
3. Insure that the switch activates correctly when the directional control pedal is pushed slightly
forward and released and when pushed slightly in reverse and released.
4. Tighten the switch fasteners and retest.
CMK 10-28-2014