I am putting together a vacuum chucking system and have acquired a Gast model 0523 vacuum pump via ebay. It appears to be in good shape but I want to flush it out before I assemble my vacuum chucking system and put it into service.
I have spoken to Gast and they said to use electrical contact cleaner or brake part aerosol cleaner for the flush. They said to remove the muffler plenum and then run the pump while spraying the cleaner into the suction port and let it throw it out the pressure side. This frees up the vanes so they slide easier in their slots and of course it also removes any carbon dust and/or paste that has built up. Gast told me they will paste up if run in high humidity environments and the flush will clear that out.
Please share any personal experience you have in flushing one out.