Riccar RCU-H3 User Manual

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16
Maintenance
Motor
Please note that  Riccar  motors do not require lubrication. Each motor 
contains two carbon brushes which will wear normally, and may eventu -
ally require replacement. For warranty purposes, this should be done by 
an authorized service center. Brush life is affected by the number of hours 
used, frequency of start-ups and shut-downs, humidity, altitude, and tem -
perature. In order to avoid damage to the motor itself, brushes should be 
replaced before they are completely worn out. We therefore recommend 
that you have your unit and motors inspected by a service center every 
5-6 years.