| Check the valves for failure and wear. If wear is found, change all valves at the same time. Always use new sealing rings when the valves are reassembled.
Check the diaphragms for cracks. Should just one diaphragm have a crack, change all diaphragms at the same time, as those not changed will be functioning on borrowed time, and are likely to fail in the near future.
Finally grease the pump |