Checking that the collar is still good for fitting after cleaning is essential as they are reasonably delicate, plus you can test out your theory of which way up they fit if you don't know. All the websites I've looked at regarding rotator servicing just mention about noting which way the ball bearing face in their collar rather than pictures, which I would obviously prefer so mistakes are not made. Sorry the picture below is a bit fuzzy but hopefully you get the idea!
Below is one collar I have refitted with new ball bearings, if when first dismantling you notice any ball bearings rusted or pitted, I would definitely replace, the bearings are cheap and it's definitely worth doing a replacement rather than the pain of them jamming once put back together.
The ring gear has also had a clean but looks pretty sound, no need to replace thank fully, so I will go ahead with a light greasing and refit.
I'm just waiting on the terminal strip now , I will then need to take out the old one, clean up the connections and resolder to the new terminal and then will give it a smoke test and see how it goes!
The smoke test proved interesting.... Nothing happened so I had to recheck everything. Turned out the wiring within the rotator was faulty and I've yet to find the fault. So I turned to the CDE AR-40, this is a different set up that uses far less ball bearings, they are only a handful evenly spaced within the rotator bell. Easier to clean up and re-grease so I'm not complaining!
An afternoon later, after working out how to reset in the right direction with the help of a Utube video, I had got it back together and because I hadn't been able to get the CDR HAM-M working I pinched the terminal plate (cos it was the new one), I connected all up for the smoke test and it started whizzing around no problem.
I decided to call it a day, as I had two out of the four now working correctly.
I will work on the other two to see if they are repairable or use them for spares, either way for the price I think I did reasonable well!