13
PL-543
MAINTENANCE
INSPECTION
Periodically the cover should be removed and the enclosure and circuit board should be
cleaned if dust or grime builds up. If cleaning is required, disconnect the power and use a
vacuum cleaner and a clean, dry paint brush. While the cover is off check all electrical
contacts for corrosion and evidence of arcing.
Bearing wear is detected by excess play or sound. If the bearings exhibit excess play or
produce an unreasonably loud sound then they should be replaced.
BEARING REPLACEMENT
The unit’s bearings should be periodically checked for corrosion, wear, and seizing. The
bearings' life depends on the mounting, the severity of the application and the surrounding
environment. Sealed bearings are used so that lubrication is not required.
The bearing will wear prematurely if there is any force applied to the MD-256 body. Ensure
that only flexible conduit is used on the unit and that it is not exerting force on the unit.
E
Printed circuit board
Mounting
screws
A
D
C
D
F
Shaft