Here's a fix that sorted the dropped doors on my 126.
The door hinge pin passes through a tube on the door and is only attached to the door by spreading the ends of the pin with a hammer and chisel....
If the hinges don't get lubricated (which is quite difficult to do), the pin seizes in the tube and the hinge comes loose from the pin. That in turn wears the hinge against the pin resulting in a dropped door.
3 of my 4 hinges were worn in this way due to seizure.
I welded the hinge to the pin top and bottom and then heated the tube with a blowlamp to free the seized pin.
Finally I drilled a small hole in the tube so that the red tube on my WD40 could be inserted to lubricate the hinge in future. This hole is drilled near the top of the hinge as gravity will make the WD40 run downwards.
