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

Hi Trevor,

I have had the issues with the loose flywheel burring the crank so they don't want to come off. 
The flywheels distort very easily and the outer rim is just pressed on, to be honest if you can tighten them up without removing you will save yourself a lot of grief, i think a puller would buckle the flywheel before it pulls it over the burr, and the twist and pull method just gouges out the inside bore of the flywheel and it usually does not run true again when refitted... i know from bitter experience.

Hardened grub screws stop the loosening and the hexagon rounding out, i have some from RC helicopters that do the job.

I'm glad nothing is seizing :-)

Kind regards
Ade