Nilfisk-ALTO 590 - Manual (Page 10)

Page 10 Clarke ® Model 590/590B Operator's Manual
MAINTENANCE
WARNING: To prevent electric shock, always re-
move the electrical plug from the electri-
cal 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 left-handed end of the
brush shaft.
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 autho-
rized personnel only.
MOTOR AND CIRCUIT
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 ma-
chine is repaired by an authorized person. The machine must
be tested for electrical safety before it is used again.
Figure 6
Figure 7
2. Spring
1. The Belt
to Drive
the brush
3.
4.
5.
6.