|My problem is not this obvious!|
I fixed the front pick up on the pilot truck of the McCallum by bending the wiper so that it rubs in a non-interfering spot. But as I tested it more problems have surfaced. It runs fine on straight track. The problem now is on curves. It appears that the engine part of the loco is experiencing a high resistance short when it enters a curve. Just about any curve will cause the problem.
The McCallum tender has a new design that picks up from both sides. The tender by itself will run just like a "diesel" (note the earlier Mason locos don't have this extra pick up on the tender. They must have the engine attached to pick up on both sides. I can fix this as I add DCC by adding additional wipers to tender axles on those locomotives.) Without the engine attached, the McCallum tender runs fine. But hook up the engine and it stalls on curves and shorts the track.
I tested every other engine and all four run fine, so it is something wrong in the McCallum's engine. I looked over the engine, but could not find the issue. I'll have to work on this later. For now my objective is to get the wiring done to Falmouth so that we can run the completed sections of track.