Brush Motor Carbon Brush Check/Replacement(For Ba 451, Ba 451D, Ba 531, Ba 531D) - Nilfisk-Advance ecoflex BA 451 Service Manual

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

Check
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.
3. Remove the brush/pad-holder.
4. Lower the deck by pressing the pedal (11).
5. (For BA 451D, BA 531D) Turn the ignition key (80) to "0".
(For BA 451, BA 531) Turn off the switches (71) and (73).
6. Grasp the handle (41) and carefully lift the tank (40).
7. (For machines with EcoFlex™ system)
• Unscrew the union (A).
• Remove the detergent tank (B).
• Remove the screws (C).
• Slightly lift the tank holder (D) and mark the position of the connectors (E) and (F) (to reinstall them correctly), which must
be as follows:
• Connector (E): white cable
• Connector (F): blue cable
• Disconnect the connectors (E) and (F) from the detergent pump (G).
• Disconnect the hoses (H) from the union (I) and remove the tank holder (D) together with the detergent pump (G).
8. Disconnect the battery connector (12).
9. Remove dust and dirt from the motor carbon brush support area (A).
10. Disengage the fasteners (K) and (L) and remove four carbon brush supports (J). If necessary, disconnect the electrical
connections (M).
11. Check if the carbon brushes (N) are worn. Replace the carbon brushes when: the contact with the motor armature is
insufficient, the carbon brushes are worn, the carbon brush contact surface is not integral, the thrust spring is broken, etc.
12. If necessary, disconnect the connections (F) and remove the carbon brushes with their supports (A) to replace them.
Replace the carbon brushes as an assembly.
Reset
13. Assemble the components in the reverse order of disassembly, and note the following:
• When connecting the terminals (O), take care of their insulation from the surrounding parts of the frame.
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
A
B
CA 451 / CA 531 / CA 551
SERVICE MANUAL
BRUSHING SYSTEM
909 6756 000(5)2010-03
ENGLISH
S301538
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