ENENGLISH-22- Nilfisk ALTOOperator's Manual (EN) - SCRUBTEC 866, 871, 866, Boost 8 and 871CFigure 22Figure 23MAINTENANCEDo These Procedures When You End Your Work1. Drain the solution tank (if necessary) (Figure 22) and therecovery tank (Figure 23). To drain the tanks , followthis procedure:a. Turn the key switch “OFF”.b. Remove the drain hose from the back of themachine.c. Put the end of the hose over a drain or bucket.d.Recovery Tank:Turn the drain cap counterclockwise to open.Solution Tank:When hose is lowered to water level, water willflow.2. Flush the tanks. To flush the tanks, put clean water inthe tank through the opening on top of the tank.3. If a tank or drain hose has an obstruction, use a waterhose to flush the tank or hose. Put the water hose intothe drain hose.4. Leave the tanks and the recovery drain valve open todry in the air.5. Check the squeegee blade. Use a cloth to clean thesqueegee blade. If the squeegee blade is damaged orworn, turn or replace the blade.6. Check and clean the solution lid gasket. Use a mildcleaning solution and rinse the parts in clean water.Check the batteries and if necessary add distilled waterafter charging. The correct level is within 1/4 inch (1/2 cm)of the bottom of the tube in each cell.CAUTION: Tap water may contain contami-nants that will damage batteries.Batteries must be refilled withDISTILLED WATER ONLY.WARNING: Lead acid batteries generategases which can cause an explo-sion. NO SMOKING. Always weareye protection and protectiveclothing when working nearbatteries.Use a clean cloth and wipe the surface of the machine.Charge the batteries. See the instruction in the section ofthis book called “How To Charge The Batteries”.