Nilfisk Scrubber BA 451

Warning: This procedure requires trained personnel with PPE!

Remove the detergent remained in the hoses and in the pump

Turn on the machine by turning the ignition key (80) to “I”

Turn on the EcoFlexTM system by pressing the switch (77)

Check that the switch warning led (78) turns on

Press the switches (77) and (82a) at the same time, until the switch warning led (78) starts flashing

Wait for the warning led (78) to stop flashing and for the vacuum system to turn on

Warning: This maintenance check requires trained personnel with PPE!

Cover (A) removed from the vacuum system motor (B)

Electrical connections (D) disconnected

Check the carbon brushes for wear

Components assembled in the reverse order of disassembly

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

NOTE: The hole (K), allowing to compensate the air in the cover interspaces, contributes to create vacuum in the tank. If necessary replace the gasket (G) by removing it from its housing (H). When assembling the new gasket, install the joint (I) in the rear central area, as shown in the figure

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

- SOLUTION FILTER CLEANING (For BA 451, BA 451D, BA 531, BA 531D, CA 451, CA 531, without EcoFlexTM system)

1. Drive the machine on a level floor

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

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

2.3 - (For CA 451, CA 531) Disconnect the power supply cable (59) from the electrical mains

3. Close the solution tap (A) under the machine left lower side. The tap (A) is closed when it is on the position (B) and it is open when it is on the position (C)

4. Remove the transparent cover (D), then remove the filter strainer (E). Clean and install them on the support (F)

NOTE! The filter strainer (E) must be correctly positioned on the housing (G) of the support (F)

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

(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) Turn the ignition key (80) to “0”

(For BA 451, BA 531, BA 551) Turn off the switches (71) and (73)

(For CA 451, CA 531, CA 551) Disconnect the power supply cable (59) from the electrical mains

Open the recovery water tank cover (22)

Remove the retaining plate (61) of the tank (40)