Wanted - handbook for Engine driven Knorr Bremse LP1012 air compressor

So after my last, incorrect post, I now know the air compressor is a Knorr Bremse LP1012.

I have searched the Knorr Bremse downloads, and spoken to Technical help desk - but it is so old that they do not have any documentation.
I would like to find a Data sheet or handbook - with its details on about this pump.

Many thanks



The red bit