VT631505AJ compressor knocking loudly after pressure builds
by Scott Harper
Husky pro , Campbell Hausfeld model VT631505AJ (AGM05
When the compressor first starts without any pressure it runs normal(fairly quiet), as it builds pressure it starts knocking loudly. the pressure leaks down even if the regulator is backed of all of the way.
the compressor is around two years old and not used much, there is plenty of oil in sight glass. the manual mention that the check valve may cause noise. thought this compressor would last longer than this. any help would be appreciated.