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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
E228 - Comet Dynamo Pinion
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<blockquote data-quote="Don Morris" data-source="post: 16163" data-attributes="member: 4564"><p>Since the original question seems to have been answered OK can I bring up the subject of leaks from the seal/pinion. I had leaks on my standard Comet, tried a Bantam seal, slightly tighter on the pinion. This leaked and marked the pinion.</p><p> </p><p>So pinion was slightly reground and then set in lathe, rotating, with a motorised polishing mop running against it. The result was an extremely fine polish. This proved not to leak, with standard seal and undersized pinion.</p><p> </p><p>This proved that all the textbooks were correct when they stated that a high finish was required for a running seal! Also the seal must be oiled when putting together as it's the thin film of oil which provides the seal.</p></blockquote><p></p>
[QUOTE="Don Morris, post: 16163, member: 4564"] Since the original question seems to have been answered OK can I bring up the subject of leaks from the seal/pinion. I had leaks on my standard Comet, tried a Bantam seal, slightly tighter on the pinion. This leaked and marked the pinion. So pinion was slightly reground and then set in lathe, rotating, with a motorised polishing mop running against it. The result was an extremely fine polish. This proved not to leak, with standard seal and undersized pinion. This proved that all the textbooks were correct when they stated that a high finish was required for a running seal! Also the seal must be oiled when putting together as it's the thin film of oil which provides the seal. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
E228 - Comet Dynamo Pinion
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