Posted by TSAN on November 04, 1999 at 11:45:33:
In Reply to: Re: RE: STICKY PISTON on Hirsbrunner HB21 posted by Roger Lewis on November 03, 1999 at 20:52:08:
Thankyou for your opinion on Hirsbrunner piston valves. I will try the oil that you stated, and see if it will solve the problem.