My local hobby shop sometimes asks for me to help on repairs that have them stumped, and as a retired electrical engineer/nuclear submariner/hack machinist, I've usually been able to help. Last weekend, they asked me if I would tackle a Rivarossi N-scale Big Boy that is mechanically frozen. I can see what would seem to be the problems - one rear driver on the front engine free-wheels on the axle, a couple side rods with the sloppy 'U' ends are loose from the respective main crank pins, and 3 of the driver sets are rotationally out of sync with the other 5. My problem is holding the drivers that are correctly aligned into the frame, while keeping the open ended siderods in place on the main crank pins, and rotating the remaining drivers into place against the idler gears so they are in proper sync when seated in the axle slots. I've tried a half dozen times without success. When I get the parts all together, it seems one driver set is always misaligned with the rest and the chassis will not roll freely. Does anyone know the trick to fixing these #%^$*&)!@$ things? Gary Q
- posted
18 years ago