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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil pump OP30 removal
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<blockquote data-quote="SteveO" data-source="post: 129505" data-attributes="member: 3636"><p>Vinnie Boy. The answer I'm afraid is no. You must remove the G50 plate in order to extract the oil pump. If you've had it out before, you will recall it fouls the plate before you can get it right out. Both the plunger and sleeve have extractor threads built into their blind ends. The sleeve takes a crankcase bolt IIRC. You may find it quite difficult to get out, as it and the crankcase may have distorted over time. But that will be nothing compared to trying to get a new one back in! Don't ask how I know. Have a look at this thread:<a href="https://www.vincentownersclub.co.uk/threads/twin-oil-pump-fitting.12155/page-4#post-113124" target="_blank">https://www.vincentownersclub.co.uk/threads/twin-oil-pump-fitting.12155/page-4#post-113124</a></p><p>for my problems! It is quite clear "selective assembly" was employed at the factory. Heat will have no effect on making extraction/reinsertion any easier, as the coefficient of expansion of the alloy case and the phosphor bronze sleeve are virtually identical.</p></blockquote><p></p>
[QUOTE="SteveO, post: 129505, member: 3636"] Vinnie Boy. The answer I'm afraid is no. You must remove the G50 plate in order to extract the oil pump. If you've had it out before, you will recall it fouls the plate before you can get it right out. Both the plunger and sleeve have extractor threads built into their blind ends. The sleeve takes a crankcase bolt IIRC. You may find it quite difficult to get out, as it and the crankcase may have distorted over time. But that will be nothing compared to trying to get a new one back in! Don't ask how I know. Have a look at this thread:[URL]https://www.vincentownersclub.co.uk/threads/twin-oil-pump-fitting.12155/page-4#post-113124[/URL] for my problems! It is quite clear "selective assembly" was employed at the factory. Heat will have no effect on making extraction/reinsertion any easier, as the coefficient of expansion of the alloy case and the phosphor bronze sleeve are virtually identical. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil pump OP30 removal
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