"Joe AutoDrill" wrote:

After 2-3 years of running like this, the unit doesn't stroke so well. The
seals are dried out and the cylinder, although still sealed properly, needs
up to 80 PSI air to stroke at all. Normally, they stroke at 15 PSI or so...

Have you tried calling Zatkoff and asking them for ideas?

http://www.zatkoff.com/

Wes