It does sound like a dead spot on the commutator. Although it's unlikely it would stop on the same spot every time. You might check the motor brushes, and stretch the brush spring very slightly, to apply a little more pressure on the brushes. You could also clean the commutator and check for any small specks of dirt that might prevent a clean connection. That's where I would look for the problem.
What you are describing sounds like you have a dead segament in the armature windings.
blabride After a complete rewire and solder job I think I may have a bad motor. It will not go from a dead stop until a touch the flywheel. It will then run all day. If I bring it to a stop after it has run a while sometimes it will go sometimes not until I give the flywheel a touch. Weird. This one may have to become a dummy. Track is clean. SB
After a complete rewire and solder job I think I may have a bad motor. It will not go from a dead stop until a touch the flywheel. It will then run all day. If I bring it to a stop after it has run a while sometimes it will go sometimes not until I give the flywheel a touch. Weird. This one may have to become a dummy. Track is clean.
SB
Check the motor brushes - sure sounds like one is sticking slightly.
Had one like what you described - on mine a drop of glue somehow got down on the one brush and as holding it.
Won't hurt to look!
BOB H - Clarion, PA
Hard to help without a picture of the truck and its wires.
You are look at it and don't seam to see it. Hard to advise with just words discribing what is going on.
Has anyone dismantled the genesis gp9 trucks for rewiring? I have been fighting one of these for a week. I have put decoders in over 100 locos including four of these but this one has fought me all the way.
The first issue involved the boards nine pin plug wires being to long and interfering with the rear weight. Second issue was a short in one of the bulbs. Then came my insistence on allowing the plastic floor of the cab to break the front trucks wires not once but twice.
Then the motors orange wire came undone. Now there seems to be a short in one of those front truck pickup wires. It programs and runs fine a bit then won't start until I jiggle the front truck.
The question I have is what am I looking at with those wires? Are they covered in shrink wrap at the pick up? Do the brass pickups detach from the plastic side frames? Any advice would be welcome.
thanks