Gen I.D. and parts

Bkpigs · Sep 3, 2012

I posted about this Gen on the Farmall board but thinking this didn't come off a Farmall originally. It has two brushes and three posts (one F, one A, and one ground post). That is a picture of the tag.

Janicholson · Sep 3, 2012

An A generator has a connection between the Non grounded brush (connected to the A terminal) and the field windings. It is the source of the field voltage. The resistance might measure between 2 and 5 ohms, from F to A. If a piece of plastic is put between the brush and the commutators, the A and the F terminal will be isolated from the body of the gen (frame).
If it is not connected to the A terminal, it may be a B generator. This type has a internally (and separately) grounded field. The field current is supplied from the VR and grounds inside. The A terminal will have a path to ground through the commutator to the grounded brush the same as an A type, but no connection to field. Putting the plastic in the A brush will just isolate the terminal from the brush, and it will read open to the frame, and become open to the field terminal. Jim.

Bkpigs · Sep 3, 2012

From your description it is an A type. The A terminal wire splits; one wire goes to the brush to the commutator and the other goes to the field coils. The problem is I need new field coils, the wiring between the coils and the A term. have lost their insulation.

Janicholson · Sep 3, 2012

If they are touching field core iron, they probably need to be replaced. If they are just bare where they go to the terminal, use thin shrink tubing to reinsulate it. It will need to be taken off the terminal to put the tubing on. Jim

Owen Aaland · Sep 3, 2012

U•P was a source of rebuilt electrical parts back about 50 years ago. I don't recall seeing them with metal ID tags but I do remember getting that brand with a sticker on them.

My best guess is the numbers you have are month (12) and year (55) followed by the part number (GD 72) That model is probably generator (G) Delco Remy (D) and the particular generator number. If you could find an old established parts house that was in business back then and they still have their old books and someone who cares enough to help you, you could probably cross your numbers back to the original Delco number.

Anonymous-0 · Sep 3, 2012

Bought one of their rebuilt starters in the mid 80's. I had a Delco on a Cockshutt Golden Eagle with a Perkins and they were only one that had a rebuild at that time.

Bkpigs · Sep 4, 2012

Thanks! I will give it a try. Neat to find out what UP was.

DWF · Sep 4, 2012

Some of the parts stores stocked UP or Unit Parts was the full name. J.E Schraeder Co. in Minnesota stocked them.
DWF

Gen I.D. and parts

Bkpigs

Member

Janicholson

Well-known Member

Bkpigs

Member

Janicholson

Well-known Member

Owen Aaland

Well-known Member

Anonymous-0

Well-known Member

Bkpigs

Member

DWF

Member

Similar threads