need help fixing pump

[RichV]

I had to shut down the pump the leads to my chiller. When I plugged it back in, it wasn't working. I took it apart and everything looked OK. I could not see any damage to the impeller. I cleaned off the deposites on the magnet and put it together. It now makes a loud ratcheting sound and still doesn't work. If I pour water into the inlet, the noise goes away until it gains on me and starts pulling air. What is the most likely cause?

Thanks,

Rich

 

[trido]

Id check the impellar seat in the removable (front ent) housing. I recently had to modify a mag 7 from the plastic seat wearing away right there. I looked and looked and the wear barely caught my eye.

 

[RichV]

thanks Duane. Was the problem lateral movement?

 

[trido]

Sorry to take so long to get back to this Rich.

The impellar was sticking to the side of the housing due to a worn out boot seat. It was chattering for a few weeks and then it finally quit one day forcing me to take a very close look at it. Custom Aquatics sells impellars and front end housing replacements for the mag (danner) pumps if it comes to that.