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Service Manual – SC500
34 - Scrub System, Disc
Checking/Replacing Brush Motor Carbon Brushes
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 sufficient 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
Reassembly
8 Assemble the components in the reverse order of disassembly
Figure 11:
D
A
C
B
C
A
