Figured out why the head was clogged SEE last post

Well i got it back together and it is definately has tons of compression now. I took a few pics of it.
I painted the wheel housings to prevent rust. This color was what I had handy. Looks nice I think
Jabsco2.jpg

JABSCO1.jpg

Jabsco4.jpg

Jabsco.jpg

Jabsco2.jpg

JABSCO1.jpg

Jabsco4.jpg

Jabsco.jpg

Jabsco3.jpg
 
What is interesting about this setup is that putting it all together like that had to have cost more then using the correct vacuum pump. Not to mention that Jabsco makes a large version of that same diaphragm pump that I would think do the same job all by itself.
 
Bill, you're correct on all counts. See top, right corner (note the suggested price):

http://www.boatfix.com/catalog/578.pdf

-- and he has two of them! Plus, they aren't even designed to be vacuum pumps; they're water pressure pumps that have been jerry-rigged to operate together, to build up enough vacuum to operate the head.

But, as they say, you can't argue with success!
 
Yea, when I found them in the Belge and then looked them up, I was thinking of replacing them before I knew how easy they are to rebuild and how sturdy they are, but after looking at the price EACH, I was said "Aw He!! no!" then rebuilt them. But I don't have just two of them, I have 4, 2 on each Head. Talk about an expensive way to rig something. The previous owner must have thought his way would work better for some reason.
I have to say, when operating to it's full potential, these pumps make some SERIOUS suction....

On the other hand, i like it's originality. It's cool to think someone rigged this thing and the riggin wasn't a half a$$ job, it actually works like a single pump would.
Most of the time rigs that I find on a vehicle or anything else are the source of great problems and usually end up having to be replace and re-wired with the correct parts anyways. This rig is just as good as the original. :-)
 
The front Head pump is having issues now. It seems that one out of the two motors is too weak to start spinning over without my help. Once I spin it over by hand it spins fine, but can't start on it's own. The pumps look just like the ones above but in better shape cosmetically. I think the electric motor is going bad
 
Our original fresh water pump looked just like one of those pumps.
It would only pop the breaker when I was soaped up. My wife could
take a shower with no issues. But I never could. I would have to
wipe the soap off, get dressed, go out in the cockpit and open the
engine hatch to reset the breaker. Then go back and rinse off.
It turns out that the motor was going bad, so I changed it out to
an all in one diaphram pump like they use on deck washdown pumps.
The breaker was a 10 amp and the old pump was supposed to run at
7 amps. The new one runs at 3 amps. No issues with a new one.
I just hope the new one last 26 years like the old one did.
 
i just dont' understand how this setup can work on heads... there is no way anything can pass thru those diaphragms. This are water pumps, sure they'll pull some vacuum but not enough for solids.
 
I am not sure why you just don't replace them with the proper Vacuum generator? It would draw a hell of a lot less current and would have more vacuum. Also your current draw would be next to nothing compared to running those 2 monsters.
Bill
 
quote:

Originally posted by Billylll

why don't [you] replace them with the proper Vacuum generator?






With the weight you can save, you can take along your mother-in-law
 
Yea, i don't understand how it works either, but it does..... I would like to replace the rear one with something stronger but $$$ is a factor and I have just rebuilt that one. Some how they work but I think the pump builds the suction but the solids don't actually flow through the pumps, the are only used to get the suction
 
My largest issue with replacing these with a regular pump is the wiring. These have 2 large plugs plus a couple more wires. It's confusing to say the least.
If there was someone that had a picture of what a normal pump looked like wired up them maybe I could replicate the wiring and put the correct pump in mine.
 
I mean this looks intimidating to re-wire if I had to. The lights on the toilets are already lighting up backwards because my father re0wired it once and messed up the wiring configuration on the soilenoids on top
 
quote:

Originally posted by Billylll

I am not sure why you just don't replace them with the proper Vacuum generator? It would draw a hell of a lot less current and would have more vacuum. Also your current draw would be next to nothing compared to running those 2 monsters.
Bill






What kind of pump would you suggest to replace it with? Is there a inexpensive alternative?
I would love to have more vacuum, especailly in the Master Head... They both work right now, the front head works MUCH better than than the rear but I would consider replacing AT least the rear Head pump first and then replace the other after it gives out.
 
I suppose if I replace the pumps with one, I could just disconnect the pumps from their 2 wire leads and connect the new pump to them without re-wiring much.... That would prolly work. Where can I find a good Vacuum pump?
 
All the Vacuum Pumps I have found are $300+. That will defiantely detour me from replacing it when i can rebuild these for $40 each.
 
The S-Series pump is about $630 - you can buy all the parts for under $400. and put it together yourself
 
Still not sounding like something I want to do. I have a GenSet that has to be serviced first. That's WAY too much money for me.... I can't drop that much money on those.
 
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