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Old 01-23-2009, 02:37 AM   #1
maltMonkey
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Default March pump crapped out on me

bought this pump from Austin home brew supply les than a year ago. Brewing tonight on my ag herms system, and luckily I made it through the sparge fine. Went to turn on the pump to flush the lines with water, and the fan just bounces a little, motor hums, but then nothing. It started doing this at the beginning of a brew 2 weeks ago, but it was 25 degrees out and I assumed some water in the line had frozen it....after a minute it started working again.

Anyone know if it's busted, or if there's something I can do to fix it?


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Old 01-23-2009, 02:55 AM   #2
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i'm assuming your prime was fine. i'd check that no obstructions are inside the pump head. if not they do sell replacement heads and pump fins.


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Old 01-23-2009, 11:52 AM   #3
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Have you opened the head to check for obstructions?
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Old 01-23-2009, 02:07 PM   #4
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Well, I disconnected all the hoses and peered into the head....couldn't see anything. Do I actually need to disassemble the head to check it? The prime has been fine when I've been testing it.

Also, how do I know if I need to replace the head or pump fins?

Sorry, I basically know how to plug this thing in and prime it. That's about it.
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Old 01-23-2009, 02:17 PM   #5
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There should be 4 screws that are on the actual head. CAREFULLY unscrew them. Make sure these aren't the ones that are for the motor. You will be able to remove the head, look at the impeller, clean, it, etc. It'll let you understand a lot about how the pump works/why air bubbles are bad for it, etc. When you reassemble, remember the way everything went and do not overtighten the screws. If you strip the threads, your pump will have to be professionally repaired.
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Old 01-23-2009, 02:36 PM   #6
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Quote:
Originally Posted by ScubaSteve View Post
There should be 4 screws that are on the actual head. CAREFULLY unscrew them. Make sure these aren't the ones that are for the motor. You will be able to remove the head, look at the impeller, clean, it, etc. It'll let you understand a lot about how the pump works/why air bubbles are bad for it, etc. When you reassemble, remember the way everything went and do not overtighten the screws. If you strip the threads, your pump will have to be professionally repaired.
Very good -- I'll give it a shot tonight.
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Old 01-23-2009, 04:32 PM   #7
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I think everyone with a march should do this.....it's pretty enlightening; once you see the way the head is channeled, you'll see where air collects and whiy you need to orient it with the output up. Make sure you only take the head off, don't mess with the body of the pump....there's oil, bearings, and all sorts of junk in there.
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Old 01-23-2009, 07:27 PM   #8
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Ahoy hoy,
Not only do I agree with you Steve, I think folks that dont own march pumps, but are thinking about them, should see too. So, lets show them....
Enjoy....
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Old 01-23-2009, 07:30 PM   #9
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I almost forgot,
This is just to get the head off. The backplate comes off to get to the impeller. I didnt have access to a photo of it tore apart any farther. But this shows you how the magnetic drive works anyways.
Best I could do, hope it helped a bit.
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Old 01-25-2009, 02:33 AM   #10
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well, I've opened it up and there was no obstruction. I tried plugging it in with the head off (very briefly) and the motor turned fine. Now what?


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