Letter series never had solenoids or starter relays as OEM. (Key type starting required the change) All Letter series had switches to engage the elecrticity to the starter motor (which had an inertia spiral drive system to put the pinion into the ring gear) A solenoid is a device that is a linear, or partial arc electrical to mechanical device (like a crane magnet picking up steel) Thus the solenoid, that is also correctly called a relay, shaped like an oversized film canister, is an electrical switch powered by a solenoid internally. A solenoid with mechanical connection to the starter pinion, and an electrical switch is a dual purpose solenoid moving both the switch contacts, and mechanical linkage to the starter drive. Ford starters from the early sisties were interesting in that they used the film can looking electrical relay to power the sterter, and a movable pole piece in the windings that slapped into place when the starter got battery volts to push the drive into place through linkage. Purists are able to call them anything but a potato, and be OK with me. JimN
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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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