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Highly suggest you post your pictures, since the parts diagram is very minimal. What color is this loose wire?

From the parts breakdown https://www.lionelsupport.com/Oil-Pump_682017

We have a DC can motor, a switch, and a rectifier and regulator PCB.

The board has silkscreen labels. Red and Black would be DC regulated output to the motor, the white wires are AC coming in

locomotive



I don't know if the switch is on the AC or DC side of the circuit, but would just be in series and thus relatively simple.

Last edited by Vernon Barry
@POTRZBE posted:

I should mention that when I apply power to the clips and touch the 2 white wires together, nothing happens.

Given how weak these 3V motors are- one answer is the gearbox section grease or dirt stuck into a gear is binding the motor. I would remove the gearbox, clean the gears, apply a light grease if any, and then attempt to operate.

Just guessing, it had a problem, someone bypassed the switch, it still had a problem and you ended up with it.

@POTRZBE posted:

There is no switch that I am aware of.  This is the 2009 version of the oil pump and not the newer plug n play.

Sorry, I saw this in the parts listing specific to this version. https://www.lionelsupport.com/Oil-Pump_682017

I realize that now is external-

Lionel accessory Push Switch | O Gauge Railroading On Line Forum

Point being, again, the white wire is just AC going into the regulator rectifier board.

Either it is bad (I consider that unlikely but anything is possible), simple enough to measure DC output at the black and red wires when AC accessory voltage is applied to the white wires.

The other option or test- just apply 3V DC to the motor using batteries or another source.

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