Nilfisk-ALTO FLOORTEC R 870 Service Manual page 176

Service Manual – Floortec R 870
Main Broom Motor Carbon Brush Check/Replacement
Disassembly
1 Remove the main broom motor (see the procedure in the previous paragraph)
2 At the workbench, remove the nuts (A) and the guard (B) of the main broom motor (C).
3 If necessary, clean the external side of the motor (C) in the area of the protection band (D).
4 Disengage the cam lever (E) and remove the protection band (D)
5 Remove the fastening screws (F) of the electrical connections of the four carbon brushes (G)
6 Remove the four carbon brushes (G) from their housings, by disengaging them from the retaining
springs (H)
7 Check the carbon brushes (G) for wear. The carbon brushes are worn when:
• The contact with the motor armature is insufficient
• The contact surface is not integral
• The stroke is less than 0 12 in (3 mm)
• The spring is broken
In this cases, replace all motor carbon brushes.
Assembly
8 Assemble the components in the reverse order of disassembly
C
F
A
B
D
H
G
Main Broom System
176
E
C
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