PS-2 or PS-3?  May have some sort of binding with one motor forcing surge.  Check tires, take shell off and rotate flywheel by hand to see if one motor binding.  Grit in gears, etc.... G

MTH Authorized Service Center

Authorized ERR Dealer

Lionel Independent Repair Tech

Virginia Train Collectors Member

I assume it behaves thus anywhere on the layout and no other engine acts this way? Agree also you might test it in conventional mode.

The fact that it makes brake-squealing sounds means to me it isn't some kind of mechanical binding issue.

Lew

 

Operator of the Plywood Empire Route in the Beautiful Berkshires

Growing old is so much more fun than the only alternative.

I just performed an experiment on a PS3 SW1500. Under DCS (Remote Commander) control, with the engine moving along nicely cutting track power does NOT cause the brake-squealing sound so I don't think your problem is power cutting out or track dead-spots. I think it is in the electronics.

Lew

 

Operator of the Plywood Empire Route in the Beautiful Berkshires

Growing old is so much more fun than the only alternative.

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