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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: 129541" data-attributes="member: 3636"><p>I think the question Vinnie, is "Do you really need to do this?" How bad is the wet sumping? Vincent obviously realised that the motor did wet sump to some extent (or could), otherwise they wouldn't provide the drain in the crankcases. It's unclear as to whether it leaks through the pump itself, as all gear pumps do to some extent, or around the sleeve. As Bill has said, they should be a matched pair. The other thing is that if the teeth on the plunger are badly worn, this will mean the drive gear worm will be also (mine was!), which means splitting the crankcases anyway, as the drive worm is inside the outer main bearing. Vincents seem to be happy to run for many years with worn oil pumps, I changed mine because I was splitting the crankcases anyway to replace the blown big end. What oil do you use? BTW the real fix for wet sumping is ride it more!</p></blockquote><p></p>
[QUOTE="SteveO, post: 129541, member: 3636"] I think the question Vinnie, is "Do you really need to do this?" How bad is the wet sumping? Vincent obviously realised that the motor did wet sump to some extent (or could), otherwise they wouldn't provide the drain in the crankcases. It's unclear as to whether it leaks through the pump itself, as all gear pumps do to some extent, or around the sleeve. As Bill has said, they should be a matched pair. The other thing is that if the teeth on the plunger are badly worn, this will mean the drive gear worm will be also (mine was!), which means splitting the crankcases anyway, as the drive worm is inside the outer main bearing. Vincents seem to be happy to run for many years with worn oil pumps, I changed mine because I was splitting the crankcases anyway to replace the blown big end. What oil do you use? BTW the real fix for wet sumping is ride it more! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil pump OP30 removal
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