thank you
marjon for the info i will have a look when i no what i am look for ...i hope someone can post a pick of the compressors to give me a clue
Google AMK, Hitachi, Dunlop, there also cheap chinese copies, but tbh I have not read anyhting about them so would be very wary.
AMK is the compressor of choice, AMK is standard fit on the D4 and was the usual upgrade for the D3 when the original compressor failed.
Hitachi is I beleve totally rebuildable, AMK not so.