Poppet valve or valves leaking constantly though poppet muffler exhaust.

To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.

  • Stall air motor under load in the middle of the stroke, remove top cover and check for leak through poppet muffler on top cap plate, and/or for leak through poppet muffler in bottom motor cover.
  • Remove and clean poppet valve.
  • Make sure o-ring and back-up ring do not remain in end cap castings prior to re-assembly.