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Fresh water pump leak [message #301472]

Thu, 02 June 2016 21:35

trapper

Messages: 52
Registered: April 2015
Location: Saskatchewan, Canada

Karma: 0

Member

I'm really on a roll with starting threads!

I got the water system working for the first time since owning this coach and found that the pump is leaking some water. It is not at any connector but rather from a square hole at the front above the hose connectors.

Any idea what could cause this or if I can fix? It is not blasting out...but it is pretty consistent when the pump is running.

Thoughts?

http://i1160.photobucket.com/albums/q487/trapper_canada/20160602_192756_resized_zpsabgsmycv.jpg

75 Glenbrook

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Re: [GMCnet] Fresh water pump leak [message #301491 is a reply to message #301472]

Fri, 03 June 2016 06:17

Kingsley Coach

Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada

Karma: -34

Senior Member

My suggestion is to get a new pump but mainly because I'm not familiar with
that make/model. Should be less than $100 and guaranteed to work .
It will also give you time to work on something else of a 2 wheel, GMC or
911 nature ...

Mike in NS

On Thu, Jun 2, 2016 at 11:35 PM, wrote:

> I'm really on a roll with starting threads!
>
> I got the water system working for the first time since owning this coach
> and found that the pump is leaking some water. It is not at any connector
> but rather from a square hole at the front above the hose connectors.
>
> Any idea what could cause this or if I can fix? It is not blasting
> out...but it is pretty consistent when the pump is running.
>
> Thoughts?
>
>
> http://s1160.photobucket.com/user/trapper_canada/media/20160602_192756_resized_zpsabgsmycv.jpg.html
> --
> 75 Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS

Life is too short to hold a grudge; slash some tires and call it even !
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Re: Fresh water pump leak [message #301492 is a reply to message #301472]

Fri, 03 June 2016 08:17

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

trapper wrote on Thu, 02 June 2016 22:35

I'm really on a roll with starting threads!

I got the water system working for the first time since owning this coach and found that the pump is leaking some water. It is not at any connector but rather from a square hole at the front above the hose connectors.

Any idea what could cause this or if I can fix? It is not blasting out...but it is pretty consistent when the pump is running.

Thoughts?

I love these old PAR pumps because they will alert you if something is dripping. Repair is usually simple, but parts are dear.

The most common failure I have seen is the bottom plate seal get pushed open by freeze damage. This is much more difficult to make sound again than one would expect. Of many tries, I only managed once.
The next big failure mode is the pressure switch. There are several types and none are repairable, but all are replaceable.

Quite honestly, have it out and look at the bottom plate. The bottom plate gasket is also a couple (suction and discharge) bladder type pulse dampers. If you can see it is bowed between the screws, that is your problem. If you take it apart and flatten the bottom plate, try to rig a pressure test for it. As said, and I don't know the reason, these do not always want to reseal.

Also as said, a modern three diaphragm replacement is not all that expensive.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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