Do you have an air hydraulic pump that is by-passing air? If so, here are a few things you can try to keep that problem to a minimum.

• monitor your operating air pressure. Most pump manufacturers recommend the operating air pressure be set at 80-120 psi.
• Oil the airmotor daily. A couple of drops of air tool oil in the air inlet of the pump will work just fine. This will not only lubricate the air motor piston but it will keep water off of the metal parts and minimize rust.
• drain your air compressor tanks daily. This will keep compressor sludge out of the airmotor. Sludge build up can seize up the air motor piston.

What are your thoughts on this?