Hi, my brother has a 684 and the Lucas alternator quit on it several years and I was able to fix it by repair the ground that contacts the opposite end of the drive shaft from the drive pulley. I just cannot recall exactly what the repair was but it did involve either brazing the end of the shaft or the strip of metal that contacted the shaft. This metal strip provided the ground for the rotor and without the ground the alternator would not charge.
A few years later the Lucas died again and my brother went to local auto scrap yard and bought a Delco. He had to buy a longer fan belt and the guard over the alternator pulley no longer fit. It was did the same to his 454 and 495.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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