During re-assembly follow the procedures listed in your pump’s Engineering, Operation and Maintenance manual. Carefully prepare sealing surfaces by removing all debris and foreign matter from diaphragm bead and all mating surfaces. If necessary, smooth or deburr all sealing surfaces. Mating surfaces must be properly aligned in order to ensure positive sealing characteristics. Ensure that you have the correct sealing kit by reviewing the chart on page 4. Always wear safety glasses when performing maintenance on any Wilden product