Older Bachmann 44 tonner

[gregw66]

I understand there is a difference between an older Bachmann 44 tonner and a newer one. I owned an older one once I realize there are two power trucks. I understand the newer model uses a single motor with 2 gearboxes.

My question is can the older 2 motor version be converted to DCC? Does one simply wire the motors in parallel? What kind of current do the two motors draw? I ask because I have one given to me, brand new, never run in undecorated.

[scl1234]

Before you can answer your DCC question, you need to know the current draw of the two-motor version of the loco at "stall"...that is with the DC throttle wide open while holding the loco stationary on the rails while pressing down enough to stop wheels from spinning (i.e. motor stalled). Use a multi-meter to check the current draw during this short (2-3 second) test. Repeat the test if needed after allowing the motors to cool.

If the current draw of your loco at stall is below ~1 A DC, you shouldn't have a problem using a DCC decoder with a ~1.3A rating such as those offered by TCS and NCE. Anything over 1.2 amps, you risk overheating/frying the decoder.

As for wiring, the motors should be wired in the same way they were when you performed the stall current test above (most likely in parallel).

[gregw66]

Thanks for your reply. Upon further investigation, the unit has some cracked axle gears and will either be scrapped or sent back to Bachmann for repair or replacement.