Wheels, Drive System 104Service Manual – SC2000
Gearmotor Carbon Brushes Check/Replacement
Check
1. Remove the gearmotor unit from the machine.
2. At the workbench, remove any dust and dirt from around the drive system motor carbon brushes.
3. Remove the clamp (A, Figure 6) by disengaging the tab (B).
4. Remove the screw (C) of the carbon brushes lead-in wires.
5. Carefully disengage the retaining spring (D) and remove the carbon brushes (E).
6. Check the carbon brushes (E) for wear. The carbon brushes are worn out when:
◦ They do not make sufcient contact with the armature of the 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.
9. Reassemble the gearmotor unit.
Figure 6
C
D
E
A
B
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