Ill-fitting Parker Challenger Deluxe Nib Section

[jellybeanjilly]

Hello everyone!
I recently acquired my first vintage fountain pen from a family friend. After some research, I found it was a Parker Challenger Deluxe and needed a new sac. I've managed to replace the sac, however upon reinserting the nib section into the barrel, I found it did not fit in all the way. The cap can still screw on, and the filling mechanism seems to be working fine (using water to test!), however I cannot get the section to go down all the way. It seems very stuck, and even after heating did not budge upwards or downwards. Any advice on how to get it unstuck would be greatly appreciated!

Thanks in advance!

[GlenV]

Sometimes there is some residue inside the barrel, can gently scrape with a blade to smooth off, and same to section its easy to get a thin bit of shellac there, if that doesn't work check that the pressure bar hasn't slipped into the way, should be a nice pen for you.