Clarke
®
Operator's Manual 577 Carpetmaster
Page 10
How To Remove The Drive Motor
The motor to drive the brush needs no preventive maintenance. If
the motor must be replaced, follow this procedure:
1. Remove the four mounting screws (1). See figure 14
2. Lift the motor to remove the two screws from the motor plate.
3. Disconnect the six spade connectors.
4. Remove the motor from the machine.
Maintenance Of The Vacuum Motor
This machine uses a universal motor that has a commutator and
carbon brushes. The commutator and carbon brushes must be
checked every six months, or 600 hours of operation, whichever
comes first.
WARNING:
Electrical inspections must be made by a
person authorized to do maintenance.
Electrical repairs must be made by a per-
son authorized to make electrical repairs.
WARNING:
To prevent electrical shock, always re-
move the electrical plug from the electri-
cal outlet before doing any repairs or
maintenance to this machine.
How To Check The Commutator and The Carbon Brushes
To check the commutator and the carbon brushes, follow this pro-
cedure:
1. Remove the screws that hold the motor baffle. The motor
baffle is at the rear of the machine.
2. Remove the baffle.
3. Remove the wire clip mounting screw and the grounding
mounting screw.
4. Remove the wire nuts.
5. Remove the vacuum motor mounting screws.
6. Remove the motor from the tank.
7. Inspect the commutator. Take the machine to a Clarke Au-
thorized Repair Location if you see any of the following con-
ditions:
a. Small holes in the surface of the commutator. See
figure 15A
b. Uneven color. Look for an even dark brown color.
Clean areas or very dark areas indicate a problem.
See figure 15B
c. High mica. The mica insulation must be lower than
the commutator bars. See figure 15C
8. Remove the carbon brush assemblies and check the carbon
brushes. Replace both carbon brush assemblies if either
brush is shorter than 3/8 inch. If either brush is shorter than
1/2 inch, order replacement brushes. Be ready to replace
both carbon brushes earlier than the normal inspection time.
9. Install the motor, the motor baffle, and the fasteners.
WARNING:
The machine must be tested for electrical
safety after electrical repairs are made.
NOTE:
For safe operation have your machine checked by a Clarke Authorized
Repair Person every 12 months. Always use Clarke replacement parts.
Figure 14
1. Mounting Screws
Figure 15
Summary of Contents for Carpetmaster 577
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