Michael Isard

I have the motor running well around a track circle now. It started out being tentative but after a half hour of solid running it goes smoothly at a reasonable speed on full voltage. When I try to run it very slowly it "bunny hops" which I assume means that one of the brushes is a little dirtier than the other: the hopping is consistent all the way around the circle so I'm pretty sure the problem is in the motor and not dirty track. From the forums it doesn't look as if it's worth trying to disassemble the motor just to fix this minor issue, but if anyone has tips that might improve the situation, beyond just running the motor, I would be grateful!

Thanks very much for the suggestions! For now I will hope that the stiffness goes away by itself.

I have just unpacked my old 7740 to give to my son for Christmas. Everything is working ok but there are minor issues with the controller and I wonder if anyone has advice. The contacts are a little loose where the track wire connects. (I think I remember this problem from 35 years ago.) Is there a recommended fix other than just taping the wire to the controller? The controller is stiff where it rotates to control the voltage. That doesn't matter when using the standard flat throttle, but it makes the fancy throttle handle unusable: I worry the 2x8 plate will break, it takes so much force to move the handle. From what I can see searching the forum, it's very hard to open up the case without damaging it, and I am not optimistic that there's any maintenance I can do without opening the case, but does anyone have any suggestions! Thanks!