Motor stuck at top or bottom stroke of piston.
To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.
- Verify air pressure is 20 psi or greater.
- Increase air pressure to 20 psi or greater.
- Reverse the poppet valves, and see if problem moves to opposite side.
- Make sure o-ring and backup ring do not remain in the end cap casting.
- Clean or replace poppet valve.
- Problem poppet is typically opposite from where motor stops, because at the last changeover this poppet stuck open, preventing the next changeover.
- Remove air valve cover and check for binding/sticking of air valve cup/carriage or piston valve.
- Be careful removing the gasket.
- Remove air valve cup/carriage and/or piston valve, check for nicks or burrs, grease and reassemble.
- Replace air valve cup/carriage or piston valve.
- Remove air valve cover and check for binding/sticking of spring loaded detent.
- Be careful removing the gasket.
- Remove air valve cover and spring loaded detent.
- Clean, inspect, grease, and reassemble.