If it's the 3 truck one, you can remove the oil bunker and cut the 6 wires from the track pickup where they connect to the circuit board. On the Shays that I have put batteries into, I removed the circuit board completely anyway.
it is the two truck shay, and on my climax i did remove the ball bearings in the trucks, but didnt want to do that again in case i ever wanted to run off track power in future. i would like to put a DPDT toggle in it for track battery power.
Ok, like Bill said, it seems the pickups are connected to the truck motors.
I removed the ball bearings but also the wires and connectors to them, it seems that the ball bearing pickups connect directly to the motors. So that means I need to reconnect the wires and the metal pieces they connect to the motors and leave the ball bearings out.
Funny how you find these things out.
I also unhooked the coal bunker and found 4 wires not attached toanything
Looks like in the schematic that two are for track feeds to run the sound board, I was thinking of putting my battery power to these and attaching souind board after the RC receiver to the motors.
Anyone done this?
If I am right, there are only two wires going to each of the trucks. They carry the voltage from the track pickups to the truck motors, main frame to run lights and smoke. If after doing mine wrong, you just remove the ball bearings and springs from the pickup to wheels, (remove the 6 screws on the bottom plate of truck which opens up the wring and ball bearings). This will remove the track pickups. Then you could connect your power hookup to the wires leading from the truck to the frame for power input to loco. These wires will also supply power to the trucks.
I believe if you just wire power to one truck it will supply power through existing wiring to the other truck and rest of loco needs.
Thanks KC, but I am DCC, and track powered, so I cannot remove the track pickups, but have to separate them from the motors. I was hoping to find out without disassembling to see how tough it is going to be... If it's really going to be a pain, then I may be giving the loco away for Christmas.
Remove the bottom plate of the truck and you will see some small brass buss bars/right angle clip . Remove the clip completely and resolder the wires directly to the tab that remains. Check with meter for isolation. Use silicon to insure the brass tabs cannot make contact. There is , however, no such short cut for track power DCC. You must perform the step I just outlined, but will still need to run a second pair of wires from the brass pickups up into the loco to the main board. All pickup and motor circuits are tied together in the board on the bottom of the firebox.. But the internal truck connections from pickup to motor still need to be bypassed. Greg: it will be a bit of a chore in your case.
I do have the new trucks on it, bought a couple of years ago. The old ones had a few cracks in the plastic bottoms, but no running problems. But, I figured what the heck. I will check for the reversing switch, good tip.
By the way, if someone wants to drop by and get 2 free trucks, email me (pick up in San Diego).