Repairing a ULKA vibratory pump

[DVL]

First off, first time post here--but always lurking around CG or some espresso related site.

My problem today is...

ULKA pumps, how many wires. I just pulled apart a Gaggia Baby that I ebayed and noticed it had some backyard mechanics going on inside. Ugly connections, speaker wire spliced in, lose wires...not what I would call pretty. More what I would call a fire hazard. The one thing I noticed is that instead of the two blades for connections, like the other machines I have rooted through, this has one blade(ground?) and a connection with two wires coming off of it? Looks like a blade connection but doesn't pull off.

Any ideas? Please steer me in the right direction.

David

[Jerome a Nantes]

Perhaps you'll find some help from an article about the ulka pump on my site :
http://www.madeinthegarage.com/articles.php?lng=fr&pg=36

There is two blades on ulka pump for connecting to the power (AC current : order is not important)
One wire pass thru the thermal fuse who have a logement in the ulka pump next to the two blades.

[HB]

Wow, the images alone make for an excellent internals tutorial on vibration pumps. Nice work Jerome! I hope you don't mind this direct link to show an example:

[HB]

Someone contacted me offline asking if it's possible to repair an espresso machine's vibe pump. It took awhile to relocate this very helpful how-to due to its obscure title: I ended up with a free Starbuck. I'll add this to the Resources page for future reference.

[another_jim]

My thanks for these links and to their authors. My Semi OPV adventures earned me a small piece of grit in the little spring valve at the output end of the pump. These instructions allowed me to get the Semi back to its ridiculously overpressured lovely self in very short order.

BTW, the Ulka is a very well thought out gizmo; simply put together and easy to work on.