Spa Forums

The information contained in this forum is from SpaForums.Com and IS NOT AUTHORITATIVE advice or official commentary from Spa Shopper, SpaPartsNet.com or SpaBabes.com. Use this information at your own risk!

This topic has attachments which you can't view here. To see this topic in its entirety, Click Here

How to attach impeller to shaft

Forums  >  Troubleshooting Your Hot Tub

How to attach impeller to shaft
After hearing a noise I disassembled the water pump and found that the impeller had come off the shaft. Nothing appeared damaged so I tapped it back on, reassembled is things worked for a while but the noise returned, ie., the impeller came off again.I'm trying to figure out how the impeller is suppose to attach to the shaft. It has a place for the shaft end to press into (a large hex nut opening). Is it suppose to be a press fit? If so how do I keep it from coming off again - tapping it securely in didn't work? Epoxy of some type? Or do I have to buy a new impeller, in which case, I still have the same question... how would it attach to the shaft?Here's the pump assy I'm dealing with...http://www.jbparts.com/jbr0010.htmlThanksMike
Posted: 2009-02-07 05:56:48   By: mikeg
Re: How to attach impeller to shaft
The impeller should actually thread/screw onto the motor shaft. The "hex end" that you are talking about is probably the nut that was originally molded into the impeller. It sounds like the impeller either got hot and melted or broke its way free at some point.If there has been any water leaking onto the motor shaft the nut will most likely need some persuasion to remove. If none of the other pieces of the wet end have been damaged by the impeller coming free and you can find somewhere to get it you can probably just order a new impeller and install it. Replace the shaft seal assembly at the same time. If you can't find just the impeller you will need to replace the entire wet-end with something of a similar rating and configuration.A good walk through of a seal replacement procedure with pictures is available [url=http://spasupport.com/seq/werep/afpsrep1.html:b0jin9lc]HERE[/url:b0jin9lc]. That includes disassembly and reassembly showing how the impeller threads on and off and what to do if the impeller is "frozen" onto the shaft and breaks when you try to remove it.
Posted: 2009-02-08 01:26:06   By: goofball
Re: How to attach impeller to shaft
Your impeller's threads are probably stripped. You'll need a new one.
Posted: 2009-02-08 09:26:59   By: spishex
Re: How to attach impeller to shaft
I'm still trying to understand how the impeller should attach to the pump shaft. I don't see any threads at the end of the shaft, or on the impeller. I don't have a picture of the shaft but can describe it. The end is hex shaped, all metal, no threads. It fit into the center of the impeller which had a matching hex shaped opening, no threads.I thought the threaded part may have been stuck in the impeller so I tried heating it up but realized it's all plastic and started to melt. Attached is a picture after it melted a bit. Still, no signs of threads.I obviously need to buy a new impeller at this point but would like to know how it ends up attached to a shaft with no threads. Perhaps there's a missing piece? Or, this Pirahna A pump is different then most? Here's what I have again... http://www.jbparts.com/jbr0010.htmlThanks in advance for any suggestions.Mike
Posted: 2009-02-15 10:37:21   By: mikeg
Re: How to attach impeller to shaft
What you are seeing on the end of your motor shaft is the brass thread insert that is molded into the impeller when it's made. It broke loose, hence your impeller not staying on anymore.
Posted: 2009-02-15 01:14:42   By: spishex
Re: How to attach impeller to shaft
Can you elaborate a little more so I know what part(s) to buy? Do I just buy another impeller?
Posted: 2009-02-16 03:32:25   By: mikeg
Re: How to attach impeller to shaft
Once you've gotten it removed from the motor shaft all you'll need is the new impeller.
Posted: 2009-02-16 04:53:01   By: spishex
Re: How to attach impeller to shaft
I tried to find these directions posted in this thread, [url:174p3bag]http://spasupport.com/seq/werep/afpsrep1.html[/url:174p3bag] , but seems the website is DOA now, did anybody make a pdf file of the instructions?[quote:174p3bag]spasupport.com expired on 06/23/2009 and is pending renewal or deletion[/quote:174p3bag]
Posted: 2009-06-29 08:16:35   By: mtbdudex
Re: How to attach impeller to shaft
This was planned. Everything has been moved to:http://sparesources.com/seq/werep/afpsrep1.html
Posted: 2009-07-10 08:09:22   By: pageup