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Got ya. Yeah, bending the blades wouldn't help. The fan slides all the way down the shaft.
Here is the number on the Generator OHA-10125-A. As a side note my original says FBC-10125-A (if I'm reading the first three letters correctly)
I got the woodruff key out. It fought for a while, vice grips and a BFH did the job. I will get a larger one today.
A larger woodruff key is not the answer. You don't want to damage the armature shaft. Replace it with the proper 5/32" x 5/8" one in the event the original is tweaked in some way.
I'll need some time to go through my books with the numbers you provided and see what shakes out.
The numbers provided are not the generator part number, but the rear plate. The tag should be on the main case. This is a generic reproduction tag:
And the 35498 spacer in the diagram posted above was not used until 1956 with the 12V generators that used the B6C-10005-C armatures and measures 3/4" inside diameter, 1" outside diameter, and is 11/32" thick and not listed as appropriate for any of the 55 6V generator/pulley pairings.
That is unfortunate that there are no real identifying bits. These end plates alone are not reliable or definitive generator identifiers. These rear plates are more transferable than the pulleys. There are even tractor generators that use these plates and whatnot.
For kicks and giggles, the 0HA prefix is for 1950 6 Cylinder engines, and the F** series part numbers didn't come into play until beginning in 1952 for the OHV engines.
Presuming that the pulley came off of your original generator, and your original generator has the brush issue which you are addressing, I would try to revive the original setup. Unfortunately, generator and pulley matings of this era is one of those unexpected and surprising complexities. There are Ford catalogs that have multi-page sections devoted that.
The end plates from later generators (56-on?) have a ball bearing instead of a bushing. They are a direct swap and give a more reliable unit, no need to remember to oil the bushing.
Yeah, my focus will be on the original generator. The new brushes should be delivered in about a week.
I ran out to O'Reilly and got a set of woodruff keys. That didn't help. A new one did the same thing, it doesn't stop the fan from hitting the housing.
I put a larger one up to the slot and could tell right off that wouldn't work.
Yeah, my focus will be on the original generator. The new brushes should be delivered in about a week.
I ran out to O'Reilly and got a set of woodruff keys. That didn't help. A new one did the same thing, it doesn't stop the fan from hitting the housing.
I put a larger one up to the slot and could tell right off that wouldn't work.
As stated before, the woodruff key interface has nothing to do with the depth the fan seats at.
I hope that using your original setup, you have a properly matched set of components and you finally are able to be at peace with your charging system!
I've been following along and it seems to me that since it worked in the past, some recent change has caused the fins to make contact with the case. I see only two possible causes -
1. the pulley bore is stretched in an oval, allowing the pulley to wallow side to side or
2. the bushing on the other end is shot, allowing the pulley and shaft to wobble, allowing contact of the fins to the case.
I'm trying to understand what happened as the fan didn't hit when I sent it to you ( as least I don't remember it hitting). What changed?
I'm not sure what happened. It was working fine when we put in on at Truckstock. Then the next day I started hearing noise and discovered it was the generator. After closer inspection it was the fins rubbing.
Did hours at 3000 rpm put too much strain on the pulley? It has me at a loss.
Originally Posted by mtflat
I've been following along and it seems to me that since it worked in the past, some recent change has caused the fins to make contact with the case. I see only two possible causes -
1. the pulley bore is stretched in an oval, allowing the pulley to wallow side to side or
2. the bushing on the other end is shot, allowing the pulley and shaft to wobble, allowing contact of the fins to the case.
Your mileage may vary.
Tim
your first cause is the only thing I can think of. Well not wallow side to side but maybe stretched so it doesn't hold above the case. It's not the bushing because if I slide the pulley on the shaft now it goes all the way to the housing.
I'm not sure what happened. It was working fine when we put in on at Truckstock. Then the next day I started hearing noise and discovered it was the generator. After closer inspection it was the fins rubbing.
Did hours at 3000 rpm put too much strain on the pulley? It has me at a loss.
your first cause is the only thing I can think of. Well not wallow side to side but maybe stretched so it doesn't hold above the case. It's not the bushing because if I slide the pulley on the shaft now it goes all the way to the housing.
Just thinking out loud here.....
you did not have the key properly seated. the pulley may have been jammed against the crooked key keeping the fan blades off of the housing. After hours of 3000 rpm, the pulley keyslot and/or bore stretched to the point (and maybe the key even moved down in the shaft slightly) that it allowed the pulley to move inwards and rub. It could even be possible that pulley would have rubbed from the beginning had it been seated properly? Is there a lot of end play in the armature shaft?
(I checked my stash of parts. My 1951 6 volt gen does not have the pulley, my 12 volt gen has the 6 volt pulley on it... which looks different from yours, it has 16 blades)
Just for clarification, there isn't a simply a "6V" and "12V" pulley.
I am confused as to if the generator from Kevin that was installed at truck stock came with a pulley or of the pulley was transplanted from the existing generator (now known to have the brush issue).
I am confused too...I thought he got a generator at truckstop without a pulley and he installed his old pulley over the improperly seated key. ...or maybe he bought the generator with pulley and someone else previously installed the pulley over improperly seated key. I was also wondering if not just 6v vs 12v had different length hubs, but maybe flathead vs y-block, or 6 cyl vs 8 cyl)...which is why I was checking my stash. Still not sure where the napa guy comes into play.
Nope, the "new" generator had the pulley on it already. I just swapped out the whole unit. So I've got two complete generators with pulley and all.
Well, I also have a third 12v generator from a 292 I recently picked up. If the new brushes don't fix issues with charging, I'm pondering moving to 12v.
