I have a #259 steam engine I believe was made in 1937 or so. One of the rollers on the collector (shoe) broke off and needs to be replaced. The part number is SLS-48. How involved is it to replace this item? When I put the engine on the tracks it just sits there and hums. The light works. Are there any illustrations or service pages telling me how to go about this? I saw somewhere on this forum about someone who had disassembled his 259 and there was a long pictorial showing the engine laid out.
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