Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Got it out. What I thought was the spring wasn't. It was the small rubber '0' ring that was stopping it. The rubber ring looked to be in good nick so didn't change it (looks a bit fiddly anyway). Put a dab of washing up liquid on the ring and it all went back no problem. Thanks everyone. I am still learning but getting there  .

Brian