23
IOM-022
MODEL: GSS-4PM
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
Diaphragm Housing Maintenance
Figure 11: Diaphragm Housing Maintenance Diagram
24.
Unscrew and remove the hex nuts and bolts holding the upper and lower diaphragm cases together.
25.
Remove the upper diaphragm case to expose the diaphragm.
26.
Remove the diaphragm and inspect it for cracks or other damage. Replace as necessary.
27.
Carefully push the shaft until the diaphragm plate clears the lower diaphragm case, and then carefully pull the
diaphragm plate, diaphragm spring, and shaft out from the lower diaphragm case.
28.
Remove the diaphragm spring from the shaft.
29.
Closely inspect the polished outer diameter of the shaft. Scratches or pits may cause the seals to leak. If scratches or pits
are present, the unit may need to be repaired or replaced. Contact Welker for service options.
30.
Remove the snap ring and seal from the body side of the lower diaphragm case.
31.
Replace the seal, and then return the snap ring to the body side of the lower diaphragm case.
32.
Remove the snap ring, bearing, back ups, and O-ring from the diaphragm plate side of the lower diaphragm case.
33.
Replace the back ups, O-ring, and bearing, and then return the snap ring to the lower diaphragm case.
34.
Lightly lubricate the shaft, and then carefully slide the diaphragm spring back onto the shaft.
