7
6.
Precautions
A.
Do not allow a tool to hammer excessively against a sidewall that is not being
polished or the handpiece bearings will be damaged.
B.
Make sure that the Top Cover is securely tightened; a loose cover will cause
excessive vibration and wear on bearing surfaces.
C.
Always unplug the New SZX Profiler from the Power Hand Controller by grip-
ping the plug end, not the cord.
D.
Be sure the air cooling vents, located under the rear cover, are kept open and
free of dust and grit.
E.
Do not allow abrasive particles or oil-abrasive slurry to enter the spindle and
Top Cover of the handpiece or handpiece motor.
F.
In the event the entire Swing Head of the handpiece must be removed from
the motor assembly, grasp the Motor Connecting Ring (see fig. 1) and pull
upward. To replace, again pull upward on the Motor Connecting Ring and fit
6
Replacement of Carbon Brushes
The motor in the New SZX Profiler uses a spring tension-type carbon brush
assembly. The approximate life of the brushes is 800-1,000 hours. Use the set of
two replacement carbon Brushes supplied with your handpiece when it becomes
necessary to replace worn brushes. (Brushes should be changed when hand-
piece is not running at maximum speed, or if it sounds as though it’s running out
of gas.) Please note that in the event you must change the brushes, it is impor-
tant that both be replaced at the same time. Replacement of only one carbon
brush will cause motor damage.
To replace worn carbon brushes, disconnect the Motor Cover by unscrewing it in
a counterclockwise direction. The motor brushes are now exposed. The worn
brush assemblies can be removed by using a small Phillips head screwdriver on
the screws that secure the assemblies (see fig. 6). The brush spring mount will
push the assembly out of the well so that it can then be lifted clear.
The two new carbon brushes should be installed by gently pushing them into the
brush well. When each assembly has been screwed in securely, replace the
Motor Cover and Power Cord.
Fig. 6
Maintenance
Dust Removal
From time to time it is necessary to clean the excessive dust that accumulates in the
Motor Cover. Unfasten the Motor Cover in a counterclockwise direction, and remove
excessive dust with a dry brush. If necessary, use a moistened cloth with detergent.
Never use thinners or alcohol.
Lubrication
Occasionally apply a small amount of Molybdenum grease to the Nylon Drive
Shoe located under the Top Cover. (see fig. 5).
Nylon Drive Shoe
Fig. 5
Carbon Brush
Screw
Tighten
Loosen
Motor Cover
Summary of Contents for 510-2245
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