Nilfisk-Advance R 253 9087362020 Service Manual

Contents

Solution System92Service Manual – Scrubtec R 253 - RA40Solution SystemFunctional DescriptionThe solution system supplies water and detergent tothe brush when cleaning the floor. The solution tank isalso the main machine body There is a manual valveon the left side of the tank, just under the rear wheel,to close the water supply whenever maintenance mustbe performed on the machine. The solution flows fromthe tank to the valve, through the filter and solenoidvalve (EV1) and then to the brush deckThe detergent pump (M4), present only on ChemicalMixing System, controls the flow of detergent fromthe Chemical Mixing System tank which is thentransported to the flow in the main tube just beforethe solution enters the brush deckThe Chemical Mixing System can be selected withthe specific detergent percentage adjustment buttonThe quantity of detergent is defined by the operatorvia the buttons on the dashboard instrument elec-tronic board (EB4)Solution flow levels 1, 2 and 3 regulate the flow of so-lution on the basis of the machine speed so as to keepthe quantity of solution dispensed per square metre offloor treated constant (for further details and modifi-cations, see the corresponding paragraph in the chap-ter Control System)Located centrally, below the solution tank, there isalso a hole for draining any liquid in the battery com-partmentThe solution flow is regulated by various timed ON /OFF cycles, according to:• Water flow rate adjustment (0 - 4)• Solution tank levelBoth the solenoid valve and detergent pump (whenthe Chemical Mixing System is enabled) follow thesame timingsThe solenoid valve and detergent pump operate onlywith the following inputs/conditions:• Driver’s seat microswitch closed• Brush function on• Forward pedal pressed• Battery level not critical, display icon withoutsegments and flashing outline.https://harrissupplyind.com - To Order Parts Call 608-268-8080