I took some time today to inspect my new-to-me Linhof Technika IV 13x18. As it seems the back has an issue. The ground glass / the film holder is attached to the back using two levers which are spring operated.
One of these springs is broken, therefore the grundglass/hood is dangeling loose. does anyone know how to take the mechanism apart to repair it?

Click image for larger version. 

Name:	20230623_113640.jpg 
Views:	23 
Size:	44.5 KB 
ID:	239822