Nilfisk-Advance BR 850S Service Manual

Contents

38 - FORM NO. 56043097 / Adgressor ™ / BR 850S, 850CS, 950S, 950CS, 1050S, 1050CSSOLUTION SYSTEMFIGURE 1FUNCTIONAL OVERVIEWSee Figure 1. The plastic (polyethylene) molded main body structure fulfills three (design) functional uses. They are the platform for the operator’sseat, mount cavity for the electrical panel and as the storage tank for the machine’s scrubbing solution. The solution tank fill capacity is 42 gallons(157L). Plumbed into the flow control valve hose outlet is a serviceable solution filter to keep debris from entering the solenoid valve. Also fitted tothe flow control valve is a short flexible drain hose to empty the tank for system maintenance.The solution system uses (2) valves to stop, start and regulate the amount of solution dispensed onto the floor. Located underneath the right side ofthe solution tank two feet back from the front is mounted the electrical solution solenoid valve L1. Its function is to stop and start the solution flow tothe scrub brushes. Located on the operator’s steering column support is the solution lever (tee handle). The lever and connected cable move theflow control valve arm that regulates solution flow to meet a specific operator’s scrub application.See Figure 2. The electrical circuit that turns on (energizes) the solenoid coil L1 is activated through the E1 control panels switch buttons (touchpad). Note: See the Know Your Machine section in this manual for a detailed explanation of the complete solution operation modes.During normal machine scrubbing the solution system’s Auto Mode is selected and works in conjunction with the (A1) wheel drive speed controllerand the foot pedal (throttle). This input activates the scrub system’s outputs to turn on & off the (L1) solenoid valve. The solution flows to the scrubbrushes any time the manual flow control valve is open, the scrub deck is lowered and the drive pedal is pushed into the forward position. Note:When the solution on/off button is turned off, no flow can occur regardless of the manual flow control being on, drive pedal activated and the scrubdeck down. -,01*(0+-2)-,.)(3"+-4,256-)72!).1*)-2"+-4,25!6)-81().2,4,*)-81().2+.9:+*12)-81().;2"+-4,