I saw the other recent thread here with some other user having issues with his dampers after replacing them on his epson 9800. I am having a similar struggle, but yet symptoms a bit different so I am posting a seperate thread here. 3-4 months ago I acquired an epson 7880 intending to clean it up and use it for piezography - did the whole piezoflush thing and cleaned capping station, wiper blade, etc. Changed the dampers and did the INIT FILL - managed to get clean nozzle checks. But had problems with leaks - I could physically see piezoflush leaking inside the printer from the print head. All I needed to do was to push the print head out into the middle of the printer and let it sit there for a while. 3-4 months ago I diagnosed it that it appeared that damper 3 and 5 (from the left) where the leaky ones. So I orded 8 new dampers and another bottle of piezoflush and exchanged damper 3 and 5. I did not do an init fill immediatly - but let the print head sit out in the middle of the printer for 3-4 hours - to confirm there was no leaks after exchanging damper 3 and 5 (they where empty as this point). Then I did an initial fill, and got the printer in a condition to print nozzle checks with no broken parts. I let the print head sit out 3-4 hours yesterday. And then just making piezo flush test prints today, and let the print head sit out again for a long while. And - sigh now it is leaking again. When I try to estimate where the leak is coming from (Based on seeing where the flush is running down the printer) it seems like now its damper 6 that is the suspect.
So I took the damperunit out again.
First of all - the connection to damper 6 looks like something fishy is going on:
Then I let the damper unit stand and rest for 20 minutes like this:
Aaaand I see this after 20 minutes - it looks like the damper is leaking.
This is how the dampers look at top
So basically I am wondering what the darn is going on with my dampers. I am sure it is me doing something wrong, but I have no idea what. It just seems fishy that I would have so many broken dampers. I don't know if perhaps I do something wrong with the damper unit when I reinsert it, that somehow can damage the valve? But not sure what it would be. I try to be carefull, and it doesnt feel like I am forcing anything - it just slides naturally down into place.
Any advice is highly appreciated. I have 6 more dampers in stock and a whole gallon of piezoflush as well. I would really like to get this printer up and running with ink