Gears , Bearing- Friction
Gears used to increase the impeller speed, or bearing resulting in friction and lubrication requirements
Oil Sump is needed
Typically 60 to 200 lit. of compressor oil required
and yearly oil change is recommended
Emergency oil reservoir(Turbo)
Provides protection during power loss to the oil pump
Oil cooler is required
Removes the heat generated from the sleeve bearing friction