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electrical diagram

Started by hindmarch, November 14, 2007, 05:25:40 AM

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hindmarch

November 14, 2007, 05:25:40 AM
Hello,i have been given a year 200?Athearn f7a +2+f7b(pensylvania)one f7a and 7b are without motors, the f7a with motor is without wireing,can anybody help with a wireing diagram for this train.Greetings from Germany.Bryan

Jim Banner

#1
November 14, 2007, 01:00:59 PM
Athearn produces many locomotives with no wiring at all.  Instead, flat metal strips conduct electricity from the wheels on one side of the locomotive to the top of the motor and the frame of the locomotive conduct electricity from the bottom of the motor to the wheels on the other side of the locomotive.  The headlight is similarly connected via a strip and to the frame.
Growing older is mandatory but growing up is optional.

rogertra

#2
November 14, 2007, 06:08:31 PM
Athearn also produce (produced?) non-powered dummy units and that's what it sounds as though you have.  It's not worth powering them as by the time you purchase a motor and gear train, it will be cheaper to purchase a whole new powered model.

Dr EMD

#3
November 14, 2007, 09:52:59 PM
The top of the motor connects to the L shaped clip that comes from the bogie/truck. The other side of the bogie/truck is grounded to the frame. The bottom of the motor will pick up power from the grounded frame.

When looking at the front (headlight end), the bogie/truck with the L shaped metal strip is on the left side.

You can use spade connectors to wire the leads from both bogie/truck to the brass clip that attach to the top of the motor.
Electro-Motive Historical Research
(Never employed by EMD at any time)

Jim Banner

#4
November 14, 2007, 11:35:46 PM
Quote from: rogertra on November 14, 2007, 06:08:31 PM
Athearn also produce (produced?) non-powered dummy units and that's what it sounds as though you have.  It's not worth powering them as by the time you purchase a motor and gear train, it will be cheaper to purchase a whole new powered model.

This is probably true for the two without motors, but the one with a motor was probably manufactured as a powered unit.  You can tell for sure by checking the trucks - do they have a vertical tower full of gears?
Growing older is mandatory but growing up is optional.

hindmarch

#5
November 15, 2007, 09:56:36 AM
hi jim,everything is complete on the train,motor,gears etc,have connected wires from a transformer and the motor runs perfect without problems,thanks for the info ,i will try it out in the next few days,regards Bryan
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