Sandpiper Diaphragm Pump S30B1H2AAAS000.

Shut off the compressed air line

Disconnect the air line from the pump

Remove plunger, actuator (29) from center of intermediate pilot valve cavity

Remove Ring, Retaining (30) and discard

Inspect bushing, plunger (7) for wear

Replace bushing, plunger (7) if necessary with genuine parts

Is the pump operating erratically or has it stopped?

Inspect the air exhaust muffler for blockage or icing

Clean or de-ice the muffler screen as required

Is there water in the compressed air supply?

Verify installation of optional air line lubricator

Check air distribution system operation mode

Set lubricator to deliver one drop of SAE 10 non-detergent oil for every 20 SCFM (9.4 liters/sec.) of air consumed

Consult the Performance Curve to determine air consumption

Check for signs of over-lubrication (e.g., sluggish cycling or stalling)

Adjust lubricator to lowest possible setting if issues occur

Consider removing lubricator if persistent issues occur

Inspect check valves and seats for wear and proper setting

Replace check valves and seats if necessary

Disassemble the wet end of the pump

Manually dislodge any obstruction in the check valve pocket

Clean out around the valve ball cage and valve seat area

Replace valve ball or valve seat if damaged

Inspect diaphragm plates for issues

Inspect intermediate bearings for issues

Inspect diaphragm rod for issues

Clean or repair diaphragms if appropriate