Secrets or what clockmakers know and don't tell you
Old clocks are made in old measurements, feet and inches, with screws in BA and Whitworth. Clockmakers use tools which fit without breaking parts which can be very expensive to repair.
Old grease and oil can become very hard particularly if the wrong kind of grease is used. Clean off old oil with white spirit but use plenty of rags to ensure that the parts are dry afterwards. You do not want to have a fire hazard in your clockroom. Dispose of the rags and do not leave any in the clockroom. Once clean you will only have to wipe it with an oily cloth to keep it clean. Do not use water based solvents they cause rust and do not leave an oily residue which is what you want.
Feel the wire rope when winding up the barrels, put a glove on and you can check for breakages by feel. Forewarned is forearmed, any breakages call in a professional firm of clockmakers and do not use the clock until given the all clear.
Never throw away clock parts, even nuts and bolts, keep them next to the clock, they are perfect templates for future repairs.
Scour car boot sales for old imperial tools.
Use marine light oil and grease for lubrication.
Do not use penetrating oils, they spread and carry dirt into the bearings. Keep oil in the oil sinks and grease on the bearing surfaces.
Old wire rope had a hessian core, soaked in linseed oil. It is still available but better to replace with galvanised wire rope which does not work harden as quickly as stainless steel a common replacement.
Use a mobile phone to get an accurate time check when setting the clock and keep a written record.