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Old 09-22-2022, 09:34 PM   #1
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Water pump problem

Our water pump has started acting up. In 3 years it has always performed flawlessly. Yesterday it started making more noise than usual and shaking a bit. Today it ran erratically, seemed to have difficulty starting up but would then run, pump clicks a few times after faucet is turned off, something it has never done before.

Water and electrical connections are all tight. I removed and inspected the filter, no debris. Tried pumping from a bottle via the winterizing T valve, no effect on pump function. Not sure what else to check.

3 more days of dry camping, hoping it will continue to function enough for quick showers...it did tonight. Then we will have hookups for a week, and can obtain a new pump to replace if needed.
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Old 09-24-2022, 07:30 AM   #2
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If its a Shurflo 4008 Series pump per what we have on our 15A...check the screws that hold the top cap of the pump to the body of the pump. They are known for not holding the cap tight to the body. After experiencing this, I drilled through the body (as applicable) and used a bolt/nut affair and it has worked perfectly.

Until last week when I discovered the 4008's internal check valve failed (symptom: Pump runs continuously...). Instead of replacing the pump I merely installed a SharkBite check valve on the high pressure side of the PEX. Works great again.
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Old 09-24-2022, 08:07 AM   #3
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Is it possible that your pressure and bypass settings might be too close? This may help for pump adjustment if you have the Shurflo 4008. It is not in the Shurflo literature.
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Old 09-24-2022, 09:10 AM   #4
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Thanks Rubicon, that's just what I needed to check that out. I guess those adjustments can get out of whack over time.

The pump seems to have trouble starting, just a trickle and the pump motor stutters a bit. Then it will kick in and run and sound normal on high volume. Still stutters and doesn't sound right on low volume. Does this sound like pressure adjustments out of whack?
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Old 09-25-2022, 11:06 AM   #5
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Originally Posted by davidmurphy02 View Post
Thanks Rubicon, that's just what I needed to check that out. I guess those adjustments can get out of whack over time.

The pump seems to have trouble starting, just a trickle and the pump motor stutters a bit. Then it will kick in and run and sound normal on high volume. Still stutters and doesn't sound right on low volume. Does this sound like pressure adjustments out of whack?
Not sure. I do know from reading the Shurflo literature that a pressure setting higher than the bypass setting will cause the pump to run continuously but that doesn’t sound like your issue.
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Old 09-25-2022, 01:15 PM   #6
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Well, the pressure adjustments are not helping. Really sounds like the pump motor is failing, if it will make it one more day I'll be at a hookup spot and a new pump is in the way.
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Old 09-25-2022, 06:59 PM   #7
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Don't know if you've seen this Escape video about the water pump and includes cleaning pump valves.

https://escapetrailer.com/videos-ori...ery-5f7bb3d-35
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Old 09-29-2022, 06:09 PM   #8
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Just a quick follow-up...replaced the water pump today and the new one is purring bbn like a kitten - something definitely went bad in the old pump motor. Easy replacement other than very tight quarters, a certain amount of cussing and a little bleeding but all's well that ends well.

I saved the old head and diaphragm assembly, it looked fine and you never know when you'll need spare parts.
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Old 09-29-2022, 09:37 PM   #9
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Quote:
Originally Posted by davidmurphy02 View Post
Just a quick follow-up...replaced the water pump today and the new one is purring bbn like a kitten - something definitely went bad in the old pump motor. Easy replacement other than very tight quarters, a certain amount of cussing and a little bleeding but all's well that ends well.

I saved the old head and diaphragm assembly, it looked fine and you never know when you'll need spare parts.
Glad you got it worked out. Those pump motors can go bad but thankfully it seems pretty rare overall. Had one seize in a marine application but that is a much harsher environment.
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