Question about Intex Krystal Clear Model 635 Pool Filter Pump 1500 Gph

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Pump 635 impeller shaft is broken, can't find another, thanks

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Here is a simple solution to your shaft impeller problem. First, you need to buy a brass (non-ferrous) round bar about 1/8 inch thick. Any other metal types WILL NOT WORK. Cut about 4 1/2 inches from the brass bar and verify it will fit in the impeller. If it does not, then you need to re-size it. The best way to do that is place it in a drill press and use a metal file (the reason for the 4 1/2 size). As the brass bar rotates, press the metal file against it until a desire size is reached. You may have to remove it from the drill press from time to time and see it will fit into the impeller. When the correct dimension is found, place it back in the drill press and use a medium grid emery cloth to smooth it down. Remove it from the drill press and cut it to the proper size (3 1/2 inches). Remember to round out both ends smooth before re-installing it back in the pump. Reassemble as normal and you are done!!! This should take about 30 minute to perform including installation. I did this to my Intex pump and it runs very smooth and have not problems with it.

Posted on Jun 16, 2011

  • TFED Jun 16, 2011

    Note: If you find that the 1/8 inch brass round bar is too small, then try 3/16 inch. It is better to buy a size that is a little bit bigger than the hole in the impeller since sizing it down will give you the correct dimensions.

  • Ron Davidson
    Ron Davidson May 12, 2014

    WHO CAN MAKE ONE OF THESE I DONOT HAVE EQUIPMENT

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I tried the brass rod and it worked great! Only my pump is a Krystal Clear model 637R. What I found after disassembly was a ceramic shaft ~3" long...it was broken at the top and bottom. The impeller is the same piece as the rotor that contains a powerful permeate magnet. I went to Home Depot, they didn't carry brass rod so I lucked out buying a 3" 10-32 flathead Phillips screw. Using my drill motor I chucked the screw and ran the drill while first filing the head using a ******* file then the threads. Flipping the screw over repeat filing until 1/8" is reached. Use a mill file to finish the final .010. I used some 600 grit to polish smooth. I reassembled and the pump is smooth and quiet now. I think if steel screw or other ferrous material it acts as a short
circuit magnetically and might over heat. Good luck.!

Posted on Sep 04, 2012

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Intex is notorious for not offering after market parts for their pool filters and pumps. Because these systems are relatively inexpensive and are designed for smaller pools, it is almost always just as easy and cheap to replace the pool filters altogether. The only way that you are going to find a replacement part is to find someone that has an old one that is not being used. Even then, it might not be economical to replace it. I know this is probably what you didn't want to hear so I apologize.

Posted on Apr 26, 2011

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The stainless steel rod wear resistance worse than ceramic rod. would you mind change it with ceramic material? Seamark specialized in manufacture ceramic rod, which has good wear resistance and high density,low noise. and the price is also acceptable.
Linda: info@smkceramic.com
http://www.smkceramic.com/

Posted on Sep 04, 2015

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A stop-gap MacGyver alternative:

I found that a #7 aluminum knitting needle was the correct diameter for the shaft (4.5 mm) I cut a 39mm length out of the needle, and discovered it contains a ceramic like material. I installed it in the pump, and It worked great for several weeks.

This apparently is not a permanent solution like the brass rod, but on a summer holiday weekend, Walmart and similar stores do sell knitting needles, but not brass rods. Also, you can cut the knitting needle with a saw and file the edges smooth. Not everyone has a drill press.

I opened the pump to find out why it failed. As you can see in the picture, ythe aluminum needle is just too thin, and wore through. Maybe a Stainless steel rod would hold up!
pump 635 impeller shaft is - 59bfaee4-4f0d-465f-a5b9-733a13a033e8.jpg

Posted on Jul 16, 2015

  • Linda Huang
    Linda Huang Sep 04, 2015

    would you mind using the ceramic rod?

  • gromittoo Jun 13, 2016

    I looked everywhere for ceramic rod, but I could not find anyone selling the correct size. After going through Knitting needles, I gave up, and used a different pump (much smaller).

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tinkerbill
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SOURCE: Need Intex Pump model #635 impeller

You know, I have made some amazing repairs on plastic items using nothing more than a soldiering iron! If you have the piece that broke off, you can carefully melt it back together. You can add more to the weld if you match the type of plastic but not too much or you imbalance it. In this case it looks like PVC. To repair it without the missing piece, form it out of epoxy putty, roughly shape it just before it sets up solid, & sand to finish.

Posted on Jan 02, 2010

  • 2 Answers

SOURCE: need impeller for 635 Krystal Clear pump

You can't. This exact thing happened to me at the end of last year. All the fins are broke. We ended up upgrading to the pump, and now this one overheats after 30 minutes and shuts off!

Posted on Jun 30, 2009

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You can't. This exact thing happened to me at the end of last year. All the fins are broke. We ended up upgrading to the pump, and now this one overheats after 30 minutes and shuts off!

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