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Arctic trip - Second ATD dies in Latvia
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<blockquote data-quote="Len Matthews" data-source="post: 5116" data-attributes="member: 178"><p>Yes, two ATD failures is worrying, usual reason is excess movement in the mag armature bearings. This sometimes is not due a worn bearing but due to collapse of the paper insulating washer. Isn't that right, Mr. J. S-D ? Referring to NKT's comment about razor-sharp teeth on Comet small idlers, the explaination here is that the Tufnol mag pinion , being quite soft, absorbs minute metalic particles from the oil and hence becomes a fine grit grinding wheel, abrading the small alloy idler teeth. Solution; renew both Tufnol pinion and small idler and fit a magnetic crankcase drain plug.</p></blockquote><p></p>
[QUOTE="Len Matthews, post: 5116, member: 178"] Yes, two ATD failures is worrying, usual reason is excess movement in the mag armature bearings. This sometimes is not due a worn bearing but due to collapse of the paper insulating washer. Isn't that right, Mr. J. S-D ? Referring to NKT's comment about razor-sharp teeth on Comet small idlers, the explaination here is that the Tufnol mag pinion , being quite soft, absorbs minute metalic particles from the oil and hence becomes a fine grit grinding wheel, abrading the small alloy idler teeth. Solution; renew both Tufnol pinion and small idler and fit a magnetic crankcase drain plug. [/QUOTE]
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Arctic trip - Second ATD dies in Latvia
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