Nilfisk Scrubber BA 531

Drive the machine to the appointed recovery water disposal area

Lift the cover (A) to washing position (L)

Wash with clean water the cover (A), the tank (B) and the vacuum grid with automatic shut-off float (D)

Drain the water in the tank through the hose (16). If necessary, release the fasteners (E) and open the grid (D), recover the float (F), clean all the components and then reinstall them

Check the tank cover gasket (G) for integrity

Check that the bearing surface (J) of the gasket (G) is integral and adequate for the gasket itself

Check the compensation hole (K) for clogging, and clean it if necessary

1. Clean the steel squeegee (Fig. 1) or the aluminium squeegee (Fig. 2), according to the procedure shown in the previous paragraph

2. Check that the edges (E, Fig. 1 or 2) of the front blade (C) and the edges (F) of the rear blade (D) lay down on the same level, along their length; otherwise adjust their height according to the following procedure

• Release the tie rod (G, Fig. 1 or 2) and loosen the wing nuts (H, Fig. 1), or disengage the fasteners (M, Fig. 2) and adjust the rear blade (D, Fig. 1 or 2), then tighten the wing nuts, or engage the fasteners, and then engage the tie rod

• Loosen the handwheels (I) and adjust the front blade (C, Fig. 1 or 2); then tighten the handwheels

3. Check the front blade (C, Fig. 1 or 2) and rear blade (D) for integrity, cuts and tears; if necessary replace them according to the following procedure. Check that the front corner (J) of the rear blade is not worn; otherwise, overturn the blade to replace the worn corner with an integral one. If the other corners are worn too, replace the blade according to the following procedure

• Release the tie rod (G), remove the wing nuts (H) or disengage the fasteners (M), remove the retaining strip (K), then replace/overturn the rear blade (D). Then install the blade in the reverse order of removal

• Unscrew the handwheels (I) and remove the retaining strip (L), then replace the front blade (C). Install the blade in the reverse order of removal. After the blade replacement (or overturning), adjust the height as shown in the previous step

4. Connect the vacuum hose (15) to the squeegee

5. Install the squeegee (25) and screw down the handwheels (26)

- BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT(For BA 451, BA 451D, BA 531, BA 531D)

1. If the tank (21) contains recovery water

• Drive the machine to the appointed recovery water disposal area

• (For BA 451D, BA 531D) Turn the ignition key (80) to “0”

• (For BA 451, BA 531) Turn off the switches (71) and (73)

• Empty the recovery water tank (21) with the hose (16)

2. Drive the machine on a level floor

4. Lower the deck by pressing the pedal (11)

Drive the machine to the appointed disposal area, and empty the recovery water tank (21) with the hose (16)

Place the machine on a hoisting system (if available). Otherwise, drive the machine on a level floor

(For CA 451, CA 531, CA 551) Open the recovery water tank cover (22). Remove the retaining plate (61) of the tank (40)

Grasp the handle (41) and carefully lift the tank (40)

(For CA 451, CA 531, CA 551) Install the retaining plate (61)

WARNING! (For CA 451, CA 531, CA 551) When the maintenance/repair procedure is completed, the tank (40) must always be locked with the plate (61)

Drive the machine to the appointed disposal area

Empty the recovery water tank (21) with the hose (16)

Place the machine on a hoisting system (if available). Otherwise, drive the machine on a level floor

Open the recovery water tank cover (22). Remove the retaining plate (61) of the tank (40)

Grasp the handle (41) and carefully lift the tank (40)

Install the retaining plate (61)