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Old 12-24-2012, 07:18 PM   #1
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Default March pump issues- help appreciated!

My March 809 got clogged with grain/flour and died on me.

I took it apart, and with the head off, the motor works fine. When the head is put back on, it dies.

So, that means something with the impeller I assume. I took it apart again, and there is no debris, and the impeller turns freely. It's clean as a whistle in the places I can see.

Is there a diagram somewhere so I can see if something is missing/broken? Or find out why this seems to be happening?

All advice is welcome and appreciated!

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Old 12-24-2012, 07:36 PM   #2
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809 pump diagram

Here is an exploded view of the the 809 series pumps. Have you taken the impeller out?

Some of the pumps do not have the thrust washer in them and over time do seize up. That happened in my case after 3 years of use. I replaced the impeller with the 815 series. It came in a "kit" with a thurst washer and a new O ring.

I bought it from Tesco Pumps 815 Impeller kit

The larger impeller was a big improvement in my system.

Good luck!
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Old 12-25-2012, 02:19 AM   #3
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809 pump diagram

Here is an exploded view of the the 809 series pumps. Have you taken the impeller out?

Some of the pumps do not have the thrust washer in them and over time do seize up. That happened in my case after 3 years of use. I replaced the impeller with the 815 series. It came in a "kit" with a thurst washer and a new O ring.

I bought it from Tesco Pumps 815 Impeller kit

The larger impeller was a big improvement in my system.

Good luck!
I get a "page not found" error on the first link.

I took the impeller out, and looked at it. It looks fine.
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Old 12-25-2012, 02:28 AM   #4
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I would think it's the thrust washer as well. The impeller gets sucked towards the front inlet and without a washer will bind up a bit. Do you have a thrust washer installed?

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Old 12-25-2012, 02:50 AM   #5
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Try this link to the March 809HS page. March 809HS

Then hit the link for the manual. Scroll down to the 2nd page of the pdf file and it will have the exploded diagram.

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Old 12-25-2012, 03:16 AM   #6
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I would think it's the thrust washer as well. The impeller gets sucked towards the front inlet and without a washer will bind up a bit. Do you have a thrust washer installed?
I have no idea! That's why I need so much help.
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Old 12-25-2012, 01:52 PM   #7
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google search found this if it helps. I also read some where you can run a drill but through the impeller to clean it out if sugar buildup dried on it but dont know what size bit you would need to use.

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Old 12-26-2012, 02:08 PM   #8
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If you have the pump apart then check for the thrust washer...should be on the shaft between the impeller and the front housing....the older versions are black so it may be hard to see against the back housing...the newer ones are white. Its a teflon washer and can wear out over time depending on how they are used. If its missing and your in a bind and need something same day then look for something that has a 1/4" hole to fit over the shaft...and its 13/32" O.D. and its 1/32" thick

And as for drilling the impeller...only do that if you are having issues with the pump de-coupling when the temps start climbing past 180* or if you accidently ran the pump dry or have a big buildup of crud inside the impeller......the drill bit size is 17/64" (next size up from 1/4") and just pass it right through the center of the impeller.

If you still have trouble with the pump then just shoot it back to us here and we can go though it and see what the issue is...we dont charge for evaluations so all you would spend is for the trip over to us..

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Old 12-26-2012, 05:23 PM   #9
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If you have the pump apart then check for the thrust washer...should be on the shaft between the impeller and the front housing....the older versions are black so it may be hard to see against the back housing...the newer ones are white. Its a teflon washer and can wear out over time depending on how they are used. If its missing and your in a bind and need something same day then look for something that has a 1/4" hole to fit over the shaft...and its 13/32" O.D. and its 1/32" thick

And as for drilling the impeller...only do that if you are having issues with the pump de-coupling when the temps start climbing past 180* or if you accidently ran the pump dry or have a big buildup of crud inside the impeller......the drill bit size is 17/64" (next size up from 1/4") and just pass it right through the center of the impeller.

If you still have trouble with the pump then just shoot it back to us here and we can go though it and see what the issue is...we dont charge for evaluations so all you would spend is for the trip over to us..
Thanks Walter (and everybody!). I have it apart, and I don't see the thrust washer on the shaft. Dumb question, but where did it go? The only thing I can think of is I clogged it up with grain on my last brewday and took the head off to clear it out. Maybe it fell out/off?
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Old 12-26-2012, 05:32 PM   #10
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Oh, for Pete's sake! The washer is $1, but shipping ranges from $5 (Tesco)-6.10 (Midwest)! Really? A .45 cent stamp won't cover it?!?

Crazy, crazy, crazy.

Sorry to rant, but that irritated the heck out of me!

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