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SECTION 5. MAINTENANCE
If the brushes are not installed properly they will not contact the commutator and the
motor will not run. After replacing the brushes, make sure to remove the flexible
rubber coupling (see Section 5.2), place the motor on a clean surface, and run it freely
(no-load, without a generator or chamber assembly attached) for 15 to 30 minutes
before using the unit to process samples. This will allow the brushes to “seat”
properly and will extend the life of each set of brushes. This will also extend the total
life of your motor since the commutator surface will “wear” longer.
5.4 BEARINGS AND LUBRICATION
Motors are equipped with sealed ball bearings. Under normal use they require no
additional lubrication. A tube of lubricant (PN 61971) is included with every drive unit
and should be used to lubricate the threads of all connecting threaded parts, as well as
the drive pin at the tip of the floating shaft (see Section 1.3). Lubricant should not be
used to lubricate moving parts or bearings.
5.5 GROUNDING INSTRUCTIONS
In the event of a malfunction or breakdown, grounding provides a path of least
resistance for electric current to reduce the risk of electric shock. This instrument is
equipped with an electric cord which is grounded to the chassis housing. The plug
must be plugged in to an outlet that is properly installed and grounded in accordance
with all local codes and ordinances.
WARNING: DO NOT modify the plug or cord that is provided. Damaged or worn
power cords should be repaired or replaced immediately by a qualified electrician.
WARNING: Keep all housings in place and in working order. DO NOT use the
motor in a dangerous environment.. DO NOT force the unit to do a job it was not
designed to do.
WARNING: Reduce the risk of unintentional starting. Make sure that the switch is in
the “OFF” position before plugging in the motor.
CAUTION: To prevent damage to the drive mechanism, never operate the motor
without a sealed chamber assembly or generator probe installed, or the flex rubber
coupling removed from the motor.
