Dear Dana, Walker, other members of the forum,
Many of you might have read my recent misfortunes with the Epson 9900 due to the exchange of the dampers unit and cleaning station by a technician here in Switzerland.
Reading the Service Manual of Epson, I read that the screws that attach the ink lines to the dampers unit should be tightened with a torque of 3±0.5kgf⋅cm.
When the technician was tightening the screws, I remember seeing him doing it with a conventional screwdriver I think, and tightening them really strong.
I just wonder whether an over-tightening of these screws can squeeze the O-rings, preventing the ink from freely flowing into the dampers and the head. If that is a possibility, I just wonder whether my head might have been dry in some nozzles, and then ulterior cleaning operations might have fried them due to overheating? I think I read something related to this on another post of a member with a 9900… ?
I am just trying to understand why and how it is possible that a normal “maintenance” replacement of pieces on my 9900 has led to having a massive boat anchor I need to throw away now. I am convinced something wrong happened there, and the repair company is not claiming itself responsible for the damage.
On a different note, this information is also important, because if I decide to change the head for a new one but the dampers were the culprit, then a second head might get damaged too…