One of my recent projects has been bringing a prewar Lionel O-gauge 616 back to operation. Unfortunately, both geared wheels have lost their grip on the axles. If I simply turn the engine over to look at something, the wheels will generally fall right off the axle. The track gauge prevents the wheels from moving laterally, so I am able to run it. My dilemma is that I cannot pull the entire consist with the engine.
Should I try replacing only the wheels, or do I need to replace just the axle?