R.P.S. Corporation MAGNUM series, Service Manual

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Magnum Service Manual V1.0
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BRUSH LIFT SYSTEM
DOWN PRESSURE
Down pressure is regulated by the controller on the machine as. The desired brush pres-
sure is selected by using the brush pressure switch on the control panel. The brush pres-
sure selection is read out on the LCD display in the form of a bar graph.. The bar graph is
segmented in to 5 levels the lowest being 1 bar and the highest being 5 bars. The pres-
sure relative to each of the settings is programed into the controller and are fully adjustable..
BRUSH LIFT SYSTEM ADJUSTMENTS
The brush lift system has two adjustments that can be made. The first adjustment is the
length of travel of the actuator ram. This controls how far down it will allow the brush deck
to go. The second adjustment is the upper linkage adjustment that controls how high the
brush deck will lift off the floor .
To access the actuator and its linkage the body of the machine must be tipped back. To
do this you must first drain the solution and recovery tanks completely. Then release the
2 soft latches directly above the scrub deck on either side of the machine. Now use the
handle bars to tip the body of the machine backwards carefully until the strap stops it. After
the adjustments have been made, tip up the body, secure the two soft latches and test the
machine.
BRUSH LIFT ACTUATOR
The actuator must be able to extend enough to lower the brush head down so that it can
reach slight dips in the floor. If the head can not do this the actuator may not be extending
enough. The distance the actuator extends is controlled by a limit switch that is housed
internally in the actuator.
ing the parameters of the controller. When the throttle button is depressed the controller
monitors the amp draw of the brush motor and adjusts the scrub deck height to obtain the
target amp draw on the scrub motors. The target amp draw of the motors is set using the
brush pressure switch on the control panel. The brush pressure setting is shown on the
LCD display in the form of a bar graph. The target amps for each of the brush pressure set-
tings are defined by the parameters that are programed into the controller. When the throttle
of the machine is released the scrub brushes raise up off the floor for 2 seconds. This is
called raise time. The purpose of this is so the scrub brushes start up under reduced load
which leads to much longer motor life. Raise time can be modified and is set through pro-
graming. If scrubbing begins again the brushes drop back down to the floor and the control-
ler again starts analyzing the brush motor amp draw and adjusting the scrub deck pressure
accordingly. When the scrub deck switch is turned off the scrub head raises for four seconds
to it’s fully raised position,