Lionel Legacy Lionmaster Challenger Chuffs In Forward Direction Only

I believe the cherry switch is on the front truck on this model, you will have to drop the front drive wheel set to get to it.  That's the likely suspect here as there's no difference electrically between forward and reverse as far as the chuff operation.

Thanks GRG.  I'll take a look at dropping the front drive set.  John

GRG, the cherry switch IS on the front truck.  When I removed the boiler from the frame I noticed some slop between the front motor and the truck.  So I dropped the truck, re-seated the liondrive coupling (shown in photo 1), reassemble the truck to the motor and everything works fine now.

I do have another issue you might be able to help me with.  I have a 6-11149 Legacy LionmMaster Big Boy (UP # 4006).  This engine has the worm drive motors (see pic 2) instead of the "Liondrive" that my Challenger has (see pic 3).  I dropped the front truck on that engine because it was binding some at very slow speeds but when I reassembled it the motor-to-truck fit is so tight that it hardly runs at all before binding up.  Any suggestions?

Thanks.  John

First thing I'd do is pull the motor and mount and make sure nothing is visually wrong, then reassemble it.  Obviously, when you assemble it, under no load the motor should turn freely and rotate the wheels.  If there's binding, you need to run down the cause.