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The Norfolk Broads Forum / Broads Boat Owners Q & A / Jabsco Pump Problem
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Posted By Discussion Topic: Jabsco Pump Problem

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Bounty
May-07-2005 @ 11:23 PM                           Permalink
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I'm not sure this is going to make much sense. I really need to draw a picture.

Our shower is drained and toilet flushed by jabsco pumps, probably 15-20 years old. They have a steel body and bronze impeller housing. There is a 1" inlet and outlet and a small machined hole directly above, which seems to allow air into the impeller.

The Toilet one is fine but the shower one, when used, sprays water out of the machined hole (I've wondered for years where the bilge water comes from!). I have taken the cover off the impeller and all that is inside is the neoprene impeller itself.

I'm reluctant to replace the whole pump due to cost. Can someone tell me if this is a symptom of the impeller wearing out (which I believe can be replaced alone), or am I going to have to stump up proper money to get a new pump?

Thanks,

VetChugger
May-07-2005 @ 11:42 PM                           Permalink
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It sounds to me as though the pump is working as it should. The only problem is the water spraying out of the hole. My boat also has jabsco type pumps but don't have holes like this unless I've not seen them! Is it some form of breather that normally has a plug of some sort? I can't immediately think of aproblem that blocking the hole up would cause as the pump struggles to create a vacuum anyway.

Trevor

BarnacleBill
May-07-2005 @ 11:56 PM                           Permalink
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Is your pump anything like the one in the link?  This has two drainage holes in the bearing housing; if there is water coming out of these then the seal has gone.  I would have thought you could get a new seal fairly easily from any bearing factor.

http://www.jabsco.com/prodInfo/overview/1673_SERIES_FIP_BRO_PED.PDF

BarnacleBill
May-07-2005 @ 12:16 AM                           Permalink
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The other possibility is that the hole of which you speak is the one the cam fixing screw fits into, and the screw is either loose or has fallen out altogether.  This would explain the water only spraying out when the pump is running.

billmaxted
May-08-2005 @ 6:49 AM                           Permalink
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I think BB is right there should be a small brass screw in the hole to hold the cam in place You can get service kits many different types see asap supllies site there should be number stamped on the cover the thin paper seal is important and you may have to polish the inside of the cover plate if this is badly worn.

Hey, Sir is this your son you've left behind! Bill...

This message was edited by steve on 5-8-05 @ 8:11 AM

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May-08-2005 @ 10:11 PM                           Permalink
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I think you guys are right. Although there is no cam inside the pump, the hole is where most similar pumps have a cam screw. I will need to have a closer look next time down and find out what size it is.

Thanks,

billmaxted
May-08-2005 @ 10:24 PM                           Permalink
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There should be a plate with three cut outs/fingers in it attached at the top. Some have a back plate as well as the face plate. depends whether pre or post noah!Check number ASAP will supply screw as seperate part but unless all you touches turns to gold go and collect


Hey, Sir is this your son you've left behind! Bill...

This message was edited by billmaxted on 5-8-05 @ 9:28 PM

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May-08-2005 @ 11:10 PM                           Permalink
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The front plate is held in place by three brasss screws. I can't remember seeing a back plate. I'm sure it was part of the casting.

I've mailed ASAP asking for a copy of their catalogue. I seem to recall someone saying you can collect orders from them, but they aren't too keen on people "just calling in". Whereabouts are they.

Also, the boatyard that does most of my work get their parts from Peachments (or something like that). I understand they are in Brundall, but having no website, I'm not sure where. Can anyone illuminate me?

BarnacleBill
May-08-2005 @ 12:14 AM                           Permalink
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A.R. Peachment, Riverside Estate, Brundall NR13 5PL, tel. 01603 714077.

Down the hill towards the station, over the level crossing, past the Yare pub, they're about 100 yards down on the left.

billmaxted
May-09-2005 @ 7:19 AM                           Permalink
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AsAp have an on line catalouge  and are just outside Beccles you can collect but have to make an appointment Peachments will have the bits as well some have a back plate some don't. The advantage of the plate is if worn you can turn it over. Likewise with the front plate if it's circular grooves in it.

Hey, Sir is this your son you've left behind! Bill...

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