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· Just another modeller
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QUOTE (pedromorgan @ 27 Oct 2008, 09:12) <{POST_SNAPBACK}>I have only seen that damage on old O gauge loco's.

you are correct its probably the weathering powders that have contributed to it but i suspect that little or no lubrication would have also been a factor.

its interesting that the screw has worn only on one side rather than waisting. this would suggest to mee that the wheel was not perfectly centred. as it seems that this side has been doing all the work i wonder what the con rod on the other side looks like?

i wonder what richard would have to say on this one?


*** That kind of specific wear pattern is nothing to do with lubrication or weathering powder at all. Hornby should fix this at no charge. It is simply a result of bad assembly.

Its a very symptom of what happens with the typical hornby chassis: 95% have a definate tight spot and lope along at slow speed or under load - this is the source of the hornby "waddle" that is almost always there on every hornby and nmany bachmann steam loco!

Why" - because most have a lump or slight burr or two on the axle bearing area which make one axle very slightly out of alignment and this causes a tight spot once per revolution of the wheels. This can be greatly reduced by running in but its really only "wearing it in" as the crankpin shows, and is best fixed at the source!

Removing the axles/driving wheels from the chassis and smoothing the ends of each axle slot very gently with a fine rat tailed swiss file or 600 grit or finer wet and dry around a toothpick will always remove the tight spot, greatly improve running and stop this sort of problem.


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