Just spotted this Ronnie, Carfield electro's have to be the worst ever to work on, The problem is frustrating by the lack of Carfield schematics in circulation.
I had a glimmer of hope when contacting the Dransfield company to find someone still working there that remembered these machines and thought some paperwork may be hidden away in a drawer.
Unfortunately he reported like all the old gear they look to have been thrown out so, I was back to square one with Nicks machine too.
A have made a little progress and managed to get it to fire up, fire being the operative word as it has a timer motor and buzzing plus it's constantly chattering a pay slide. as the pay slide is 240vac I have had to removed the offending relay to silence the slide. so work continues.
The stripping of the motor and gearbox would have been my first suggestion for the squeal, the same solid grease I had to chisel out of Nicks reel motor gearbox too.
Those light optical sensors that are part of the win circuit through holes in the reel drums are not the best system and this one had been tampered with so expect the wins could be wrong if I can get it running. there are three micro switches one on the back of each reel solenoid arm, they have something to do with the wins too as they are operated on cherry wins. One switch arm was completely snapped off on Nicks machine. The reel solenoid mountings again are different on Carfield to such as Bell Fruit, JPM etc and because of the holes through the reel drums for the light sensor, moving the actual solenoid mount won't be an option Moving the actual reel bands may be your only option to aligning the symbols on the win line.
All those open relays that operate on mains 240vac will cause pitting of the contacts causes them to get a carbon coating and that in turn reduces the contact circuit and as the machine relies on good contacts can and will cause many different faults. They do need cleaning periodically but, especially after so many years of use. Contact cleaner is the best option with some heavy card between the contacts saves taking the coating off the contacts.
The hold timer on Nicks machine appears to have had the same cam job done on it too.
Talking to Paul, his Carfield had a couple of faulty timer motors of which I think he sourced from a donor machine so, As Nicks machine has at least one jamming motor it could be that is a problem with the age of these machines. Again they are 240vac, I have a load of 50v but they are no good for this repair so, The only source I have found for the same motors are from RS but not cheap.