Lexmark Optra 614T - Roller assembly dropped -...

Question

After a paper jam, I discovered that the roller assembly on the printer is hanging free such that it obstructs the paper cassette when you try to put it in. I also discovered a small spring loose in the paper tray - it is around 3cm long with a loop on each end.It looks as though the dis-attachment of this spring might be the problem but I can't see where it fits. Does anyone have a diagram or instructions on where and how to refit this, please?