hydrovane compressor struggles at cut off point
We got this comp 2nd hand from an internet auction site.
about a couple of weeks after that I began to hear the hydrovane
start to make a crackling noise when it was near to being full.
I replaced the oil (very mucky) and for a few days it was okay
but then the noise and the feeling that it was struggling to cut off at the end of it's cycle returned. Any ideas?