PowerBoss Nautilus Hi-Dump PB45HDSL, Service Booklet

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NAUTILUS HIGH DUMP CONTROLS AND OPERATION
CMK 7-5-2016
BASIC SYSTEM OPERATION:
The high dump incorporates two separate lift arm assemblies. The rear squeegee and rear bumper is
attached to the outer lift arm assembly and the hopper is attached to the inner lift arm assembly.
The Nautilus high dump controls consist of three rocker switches. They are located on the left side of
the operator console.
The left switch controls raising, hold, and lowering of the rear bumper.
Pressing and holding the front of the left switch raises the bumper, releasing the switch holds the
bumper in the raised position, and pressing and holding the rear of the switch lowers the bumper.
The center switch controls raising, hold, and lowering of the hopper.
Pressing and holding the front of the center switch raises the hopper, releasing the switch holds the
hopper in the raised position, and pressing and holding the rear of the switch lowers the hopper.
Both the bumper and hopper may be raised and lowered at the same time.
The right switch opens the hopper door when emptying the contents of the hopper.
Pressing and holding the front of the right switch for approximately 3 seconds opens the hopper door.
It is not necessary to press the hopper door switch for scrubbing operations. The hopper door is
automatically opened when scrubbing.
When the hopper begins to raise the hopper door is automatically closed.
If the hopper is fully lowered with the hopper door closed the hopper door will automatically open.
DETAILED SYSTEM DESCRIPTION:
Each of the two lift arm assemblies has its own hydraulic cylinder and a safety tube.
The hydraulic cylinders are used not only to raise the bumper and hopper but also to lower the bumper
and hopper. Because the bumper and hopper centers of gravity, when lowered, are in front of the lift
arm pivot points they will not fully retract due to gravity alone so the hydraulic cylinders are used to
fully retract them.
The safety tubes include a pin that can be inserted at three different lift arm heights; low “maintenance”
position, medium height position, and fully raised position.
Note: The hydraulic cylinder that powers the bumper/squeegee lift arm assembly is located on the left
side of the vehicle while its safety tube is located on the right side of the vehicle.
The hydraulic cylinder that powers the hopper lift arm assembly is located on the right side of the vehicle
while its safety tube is located on the left side of the vehicle.