Quick Connect Fitting - Capillary Stuck

It's been over tightened when installed. If you cannot remove via pliers and it's stuck in a LC column, you can try placing the capillary end in a vice (cranked up with hard jaws) with a small gap between the jaws and column end nut, and then use a flat bladed screwdriver inbetween the column end/vice jaw to get more leverage than pulling with pliers. Staff need to be trained, install a capillary finger tight and then an 1/8th of a turn, if the ftting still leaks add only another 1/8th of a turn.

Hello Oguzhan,

just some additional information to this issue.

As Saccades already mentioned, you're fitting most likely got overtightened in terms of applying too much torque before operating the lever.

This can lead to the issue of having some internal parts getting almost irreversibly stuck into each other.

You need to know that operating this lever does apply the same amount of force towards the internal clamping mechanism as forcing the fitting another complete 360 turn into the receiving port.

Always imaging how much additional force this would be.

The fitting typically just needs to be turned into a kind of loosely initial end position in the receiving port (column) before throwing the lever.

Finger-tight in this case does not mean, apply as much force as your fingers can do.

Nevertheless, there is a way on how this could be repaired.

It requires some force and some tooling.

Best is to fix the fitting into a bench vise with the tip oriented towards you.

The next step is using a plier and pulling the capillary off towards the front not to the rear.

You may need to remove the ferrule first but the only way out of the fitting for the capillary is to the front.

By pulling the capillary into this direction you also will release the stuck internal clamp.

Pulling it towards the rear is impossible as this is exactly being into the internal clamp.

You certainly also will require a new capillary and ferrule but at least the fitting is reusable.