D-4 and D-5 Oil-lubricated

Wabtec Transit Car Products Oil-lubricated

Wabtec D-4 and D-5 oil-lubricated models feature advanced-design piston rings that control oil consumption to a minimum.  They feature exhaust mufflers and vibration isolators for reduced-noise operation.  These air compressors utilize standard NEMA frame AC motors attached to the compressor portion via an adapter bracket.  The compressor and motor shafts are connected by a flexible drive coupling.
The D-5 compressor is designed for lower air volume applications.  The D-5 uses the service-proven components of the D-4 compressors, but reduces the underfloor mounting space and power usage.