
Since first posting the query I have found the info I was looking for thanks to the kind people at Clausings. Many thanks to them for their help which was offered immediately.
The info I have gives, step by step, how to dismantle and adjust the automatic powerfeed clutch on the Colchester Bantam.
Yes it appears it can be done!

You have to do a bit of dismantling but the steps are outlined clearly.
There is also advice on other maintenance jobs on the gearbox, apron, cross-slide and top-slide and gib-strip setup, etc etc, with diagrams.
I searched long and hard for the above and there may be others who have the same problems with their lathe. (djc, It was just as you described, but the step by step info will make it less likely I will wreck anything!!

)
I would be glad to share the info if anyone needed it. Just let me know! It is in PDF form.
BTW I tried to join the Colchester Owners group on Yahoo but it would be easier to get into Fort Knox! Just couldn't make it work. Has anyone had similar experience?