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Sprayer Depot Blog

Repairing a Hypro D30 Diaphragm Pump

Posted by Sprayer Depot on Fri, Feb 06, 2015

In this week’s post we wanted to shed light on some great resources we have to offer on our YouTube channel in the form of instructional videos. If you’re like me, then you’ve found yourself in a situation where you took something apart, only to find you needed a little guidance to get it put back together. Well, the team at Sprayer Depot gets that. So we put together these videos just for you, in the off chance that you forget where that one remaining bolt is supposed to go.

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Topics: Diaphragm pumps, Sprayer Depot, diaphragm pump, Diaphragm Pump Repair Kit, Sprayer Depot Instructional Video, Diaphragm Kit

Diaphragm Repair on a Udor KAPPA 43 Diaphragm Pump

Posted by Marketing Manager on Fri, Feb 14, 2014

The Diaphragm Kit consists of 3 diaphragms and 3 sets of 2 O-rings/each.  For this repair you will need:
  • A wrench
  • A screwdriver
  • ½” socket
  • 11/16” socket
  1. Loosen the bolts on one of the 3 head assemblies
  2. Remove the head assembly
  3. Remove the diaphragm, nut, and washer
  4. Remove the diaphragm
  5. Remove the sleeve, and drain the internal oil
  6. Loosen the bolts on the 2nd head assembly
  7. Remove the head assembly
  8. Remove the diaphragm, nut, and washer
  9. Remove the diaphragm
  10. Remove the diaphragm sleeve
  11. Repeat this process on the remaining head
  12. Clean the inside of the pump with carb or brake cleaner
  13. Replace the sleeve, lining up the holes on the sleeve with the holes on the piston
  14. The diaphragm has a beveled side; this side will be pointing out
  15. Replace the diaphragm, nut, and washer; tighten with a wrench
  16. On each side of the 3 outer head assemblies remove the inside of the valve cage, replace the spring, small seat (beveled side down), and large metal seat
  17. Place the valve assembly back onto the head and replace the O-ring with a new one
  18. The other side has the same pieces in the opposite order
  19. Replace the spring, seat, and large seat
  20. Replace the O-ring with a new one
  21. Repeat this process on all 3 head assemblies
  22. Replace the head assembly
  23. Tighten the assembly skipping bolts in a clockwise pattern to evenly tighten
  24. Replace the piston sleeve on the 2nd side
  25. Replace the diaphragm with the beveled side out
  26. Replace the diaphragm, washer, and nut; tighten with a wrench
  27. Replace the 2nd head assembly, tightening the bolts with a wrench
  28. Using non-detergent 40W pump oil; fill the open side of the pump to the brim
  29. Replace the final piston sleeve, lining up the holes with the piston
  30. Clean off excess oil  Replace the final diaphragm
  31. Replace the diaphragm, washer, and nut; tighten with a wrench
  32. Replace the final head
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Topics: Udor Kappa 43 Diaphragm Repair Kit, Udor Kappa 43 Repair, Udor Kappa 43/GR, Diaphragm Pump Repair Kit

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