Hi Lee, It looks like your main rectifier plates may be your problem, remove the lid from the rectifier, that is the box on the right hand side with all the wires going into it. Inside are 2 sets of selenium coated plates , check them for pitting or damage to the coating. Damaged plates will cause low excitation voltage, flat batterys, and lack of booster circuit voltage. Another source of your problem could be the DC rectifier, it is a reostat mounted om the right hand side of the fire wall, this ensures stable voltage is getting to the rectifier and batterys. Get a sparky to check it out, there should be some sort of device availabe to replace it. The oil in the main rectifier is transformer oil, do not add anything else, if you can find someone that does maintenance work on mains transformers they should be able to put you on to someone that can recoat your plates. Ill get our manuals photos copied and bound. Do you want to pick up or will I send them? PM me your mailing address, if you cant pick up. good luck Nick