This all sounds very much like an emergency get you home measure. The pulley should require the use of a puller to remove it. If it has been spinning on the shaft then more than likely the interference fit has been destroyed so it is now only the tightness of the nut which is keeping the two in contact. I suggest you speak to the RM assoc. for an overhauled quill drive assembly and return yours for attention.

That was also in my thoughts! There's a deeper-seated problem there.

My bus number (if any): RML2532

The nut holding the pulley liberated itself at some point and indeed this was a "get it home" fix.

As the quill shaft is tapered I would conclude that "interference" would be relative to nut torque ( I also used loctite).

Notwithstanding, I will be replacing the shaft and nut and am having the bore of the pulley machined to clean up.

When checked, no excessive axial or radial play seemed present, however my intention is to replace the bearings and seal at the same time.

Would anyone be so kind as to provide part numbers for the bearings and lip seal?

Thanks for all the help

My bus number (if any): RM2133

Sorry I can't help with part numbers. I usually buy a complete overhauled unit from Imperial Engineering.

My bus number (if any): RML2532

The part number will be on the bearing and on the seal. If they aren't legible take the old units in to the bearing supplier.

I thought so, I would rather just have parts prior to starting.

Thanks for the help

My bus number (if any): RM2133

It won't be much use giving you part numbers since the quill drive was beefed up about 5 years ago with a different shaft which means your bearings may well be a different size.

That's good to know. Thanks

My bus number (if any): RM2133

Hence my comment about getting a replacement unit from Imperial.

My bus number (if any): RML2532