JD
Thank you for the responses and the efforts you made to include the references on how others have worked on this issue. Ironically, I had just found the internet posts by David Farquhar, from The Silicon Underground site, in which he describes how to remove the e unit from a Marx 999 motor.
I have reviewed the Youtube videos you posted and others by Benz Trainz. I now understand how the swinging brass rod throws the two way e unit switch and where the contacts are. I have worked the e units on both of my motors, sprayed again with Caig DeoxIT strong contact cleaner and neither of them will work in forward.
From Benz Trainz I found that I would have to force remove the e unit from the motor per David Farquhar. Then to get to the contacts to clean if possible, I would have tear apart the e unit per Benz Trains video. The contacts may not be repairable.
So I have decided to take the e unit out of the circuit per a sister video by Benz Trainsz and make the engines as forward only locomotives. I will have to review the video again and make notes as to what wires to remove and which ones to hook up to get to forward only. I would do better if he had just made a marked up diagram or two of the motor showing which wires to cut and to solder and where.
Pictures for The Silicone Underground by David Farquhar
Fuzzy picture of the two position switch of a Marx e unit from a Marx 999 motor, Bright copper parts are the wiper arms
Dirty contacts of two position switch moving part
Clean moving part of the two position switch
Charlie
