Nilfisk-Advance SC401 Series - Brush Motor Carbon Brushes Checking;Replacing

146Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc
Brush Motor Carbon Brushes Checking/Replacing
Check
1. Remove the brush deck.
2. Remove any dust and dirt from around the brush motor carbon brushes.
3. Remove the four protective covers (A) (Figure 11) by disconnecting the clips.
4. Remove the carbon brush nuts (B) with the lead-in wires.
5. Disengage the tabs (C) and remove the carbon brushes (D).
6. Check the carbon brushes (D) for wear. The carbon brushes are worn out when:
◦ They do not make sufcient contact with the armature of the brush motor due to their wear
◦ When their contact surface is not intact
◦ When the residual stroke is below 0.12 in (3 mm)
◦ When the thrust spring etc. is broken
7. Replace the carbon brushes as an assembly.
Replacing
8. Assemble the components in the reverse order of disassembly.
Figure 9:
D
A
C
B
C
A