On 21/08/2020 09:24, Rob Graham wrote:
On Friday, August 21, 2020 at 7:55:42 AM UTC+1, Brian Gaff (Sofa) wrote:

It should not be any different to the shortening and lengthening though, my
guess is that the clock is not very accurate as it has worn parts dirt or no
lubrication, but do be careful with the latter, its quite a specialist
subject cleaning and lubricating a clock.

Is it one which is operated by clockwork or the weight driven kind, the
latter can be very temperamental.

I don't want to be a nay-sayer to Brian's comment about 'a specialist', but there is plenty of guidance around in books etc., on cleaning a clock mechanism, which is realy incredibly simple. The biggest concern is wear on the bushes which does become a specialist area.

You've got to take it all apart, clean it with a solvent, reassemble and
lubricate each bearing with a minute amount of oil. Not a
straightforward process.

--
Max Demian