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2cups

Backflushing, and pump(?) issues

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Posted (edited)

Hi all,

I've stripped down, cleaned, de-scaled, and replaced the seals on a rather neglected 2004 Gaggia classic. Certainly a voyage of discovery. Now it's back together, having a few issues (which may be related):

  1. Leak at pump elbow valve. I have used large quantities of PTFE tape, as per various other threads on this, which has improved the situation. Now it still leaks, but only in steam mode. I think I may have stripped the plastic threads on the pump through over-zealous tightening. Any way I can get myself out of this, or is it a new pump situation?
  2. When backflushing, I only get a few drips of water returning back to the tank. The pump goes quiet after a few seconds too. Is this normal?
  3. Very soggy, watery puck, when pulling a shot (ablit with pre-ground coffee).

Any help greatly appreciated!

Paul

EDIT: Thought it might be worth mentioning that I disassembled and de-scaled the solenoid. Also, when finishing backflushing water is ejected down the tube into the drip tray, as you would expect.

Edited by 2cups

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New pump ordered - the EX5, with brass fitting. Which should hopefully limit the scope for numpties with no mechanical sympathy (ie, me) to cock things up.

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Hiya, I've just stripped my 2007 classic and sorry to hear you've had some problems - mine was also quite neglected and I made sure I replaced all the seals etc and fingers crossed no problems as yet.

 

Stripping threads is always going to be a risk - you never quite know how tight to go until it's too late 😖

Hope everything goes well with the pump replacement

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On 27/05/2019 at 19:39, AmandaH said:

Hiya, I've just stripped my 2007 classic and sorry to hear you've had some problems - mine was also quite neglected and I made sure I replaced all the seals etc and fingers crossed no problems as yet.

 

Stripping threads is always going to be a risk - you never quite know how tight to go until it's too late 😖

Hope everything goes well with the pump replacement

Cheers Amanda. New pump in, no leaking, and (funnily enough) backflushing a whole lot better! 

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