In Reply to: Re: Correct 8N Fan Belt? posted by Tim Daley(MI) on July 19, 2020 at 07:38:51:
It's a hot day here and in rechecking the belt tension, I've more "slack" I can take out. Maybe I can move the generator farther from the manifold. Thanks for your encouragement.
About the original generator which I still have. I've good confidence that it's a genuine 8N part as the rearside of the Drive End Plate Assy boldly reads as 8N-10139 - not 10138 - and then is followed by 4 GL. It has an oil lubricating cap/port. It has three terminals for GND, FLD, and Ammeter but these letters were not marked/stamped into the housing. It does not have the Tension Assy (8N-10181) used with the 1939-1947 generator, and it does not have the Generator Support Bracket (8N-10151-C) used with 8Ns after Serial 263844. Should the generator have either for this 1949 8N Serial 214385? The generator is blue not that it matters much. I wouldn't put any money on whether it's a 2 brush or 3 brush.
About that NAPA generator. With the exception of the oil lubricating cap/port which is absent and the GND & FLD letters being stamped into the housing, the NAPA is externally identical to the original. The NAPA generator was rebuilt by the Wilson Company which is a subsidiary of BBB Industries and with headquarters here in the US. My hunch is that this rebuilt part is genuine 8N part too but I've no plans to open it.
About the ammeter, it's new but it doesn't read a charge - it never has. Nonetheless, "Spry Bess" starts everytime without stutter! I'll write to you separately on this and other questions if you don't mind.
When I purchased this tractor, it ran horribly! Besides replacing the generator on this 6v system, I tossed the old electrical harness, replaced the VR, disassembled/cleaned the starter, replaced the solenoid, coil, plugs & wires, points, condenser, resistor, and overhauled the front mount distributor. There was some other fun work too.... The 75 Tips was a great starting point, and I wouldn't have known about polarizing the generator otherwise.
I greatly appreciate your time.