water pump chattering at end of cycle

[nrvale0]

Hey, folks.

I'll admit I've yet to read the entire section(s) of the manual relevant to this topic. I'm about to go do that now.

My water pump has been chattering a bit at the end of its cycle. Just for like the last second or so but its pretty loud and sounds like it could be less-than-healthy for the pump. I use the pump most of the time as opposed to relying on shore pressure so it occurred to me if might just need a rebuild/new seals. Another thought is that something between it and the accumulator (2019 E2) might be losing/have lost prime.

Anybody have any tips?

 

[Overland]

It could be that the bypass pressure needs to be adjusted. The telltale sign is a sort of whooshing sound right at the end of the cycle.

It’s a very easy adjustment to make.  On the front of the pump there are two small hex screws: the one in the center adjusts the maximum pressure, and the one below changes the bypass pressure. Adjust it in ¼ turns until you can’t hear the whooshing anymore. 
 

The other possibility is that the rubber diaphragm (or some other part) needs to be replaced. That’s a little more complicated but I wouldn’t call it difficult. You can find fairly inexpensive repair kits for the pump on Amazon. 

Edited December 26, 2020 by Overland

[nrvale0]

Thanks for the tip. No whooshing here. Sounds more like a woodpecker. I'll record it when I get a chance.

Going to order a new pump and a repair kit today. The pumps are not that expensive to have on the shelf and one thing I've learned this year is parts on a shelf beats relying on the "supply chain". ;)

Edited December 26, 2020 by nrvale0

[SeaDawg]

3 hours ago, nrvale0 said:

 

Going to order a new pump and a repair kit today. The pumps are not that expensive to have on the shelf and one thing I've learned this year is parts on a shelf beats relying on the "supply chain". 😉

That said, I would try Overland's adjustment first. Also, check pump mounting to make sure it's not rattling.  Maybe play with the other pressure adjustment screw, 1/4 turn at a time. 

Before I tore into a rebuild. Or replacement.  We don't have a bladder on our system. So, some of my experience is limited. 

[nrvale0]

There was quite a bit of plastic shaving in the filter -- I assume I must have hit some rough roads that shook things loose that didn't shake loose when I first set sail. Cleaned that out and it does seem to have helped a little bit but see attached video.

I'll order a rebuild kit today and maybe film the service to post here after I'm done.