MAINTENANCE
WARNING: To prevent electric shock, always remove the electrical plug from the electrical outlet before doing any repairs or maintenance to this machine.
WARNING: Maintenance procedures must be done only by persons authorized to do mainte- nance.
NOTE: For safe operation, and longer life of your Clarke product, use only Clarke replacement parts.
How To Adjust The Belts
The belt to drive the brush: The tension of this belt is controlled by a spring. If necessary, replace the spring and the belt. See figure 6
The belt to drive the vacuum impeller: The tension of this belt is controlled by the position of the motor. To get access, remove the main cover of the machine. Loosen the four hex screws that fasten the motor, and move the motor forward or backward. Tighten the four hex head screws forward or backward. Tighten the four head screws and install the cover of the machine.
See figure 7.
How To Get More Use From The Brushes
When the brush becomes worn, rotate the brush shaft to get more use. When the brushes becomes worn more, replace the two halves of the brush.
To rotate the brush shaft, follow this procedure:(See figure 6)
1.Remove the electrical plug from the outlet.
2.Put the machine upside down.
3.Remove the side shoe (3) from the
4.Loosen the retainer (4) and the spacer (5) on the end of the brush shaft.
5.Rotate the brush shaft ½ (180°) turn.
6.Tighten the retainer (4).
7.Install the side shoe.
To change the two halves of the brush, remove the screws (6). Replace the brush section and the screws. See figure 6
Electrical
WARNING: Electrical repairs must be made by authorized personnel only.
MOTORANDCIRCUIT
The Model 590 has a capacitor start, induction run motor.
The Model 590B has a permanent magnet motor. This motor has carbon brushes. The brushes and commutator should be inspected annually for damage and/or wear.
This motor needs no maintenance. If damage occurs to the motor, return the machine to a Clarke authorized repair location. If damage occurs to the electrical circuit, make sure the machine is repaired by an authorized person. The machine must be tested for electrical safety before it is used again.
2.Spring 
1.The Belt
to Drive
the brush
3.
4.
5.
6.
Figure 6
Figure 7
Page 10 | Clarke® Model 590/590B Operator's Manual |