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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin oil pump fitting
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<blockquote data-quote="tatty500" data-source="post: 112881" data-attributes="member: 2532"><p>Twenty years ago when putting my B back together, after 30-ish years in bits, I was worried that the big race of the new big main bearing had not gone properly home.</p><p></p><p>To be certain I tapped it a bit with a hammer and soft drift.</p><p></p><p>It was only later when I was looking at that cross section of the engine at about page 18 of the riders handbook that I spotted how thin the crank case is between the bearing outer and the pump bore. I think this was why my original pump on being refitted had a tight spot.....Silly me.</p><p></p><p>However, when it came to getting the pump sleeve angularly in the right place I found that a smooth ended rod of the correct diameter for the scavenge/return holes in the sleeve could be inserted through the 1/4BSP return banjo hole and used to rotate the sleeve to the correct final position....assuming its not a mile off to start with.</p><p></p><p>PS don't forget to check that the OP36 screw is not too long if you are fitting a new one.</p><p></p><p>Best of luck</p><p>Tatty</p></blockquote><p></p>
[QUOTE="tatty500, post: 112881, member: 2532"] Twenty years ago when putting my B back together, after 30-ish years in bits, I was worried that the big race of the new big main bearing had not gone properly home. To be certain I tapped it a bit with a hammer and soft drift. It was only later when I was looking at that cross section of the engine at about page 18 of the riders handbook that I spotted how thin the crank case is between the bearing outer and the pump bore. I think this was why my original pump on being refitted had a tight spot.....Silly me. However, when it came to getting the pump sleeve angularly in the right place I found that a smooth ended rod of the correct diameter for the scavenge/return holes in the sleeve could be inserted through the 1/4BSP return banjo hole and used to rotate the sleeve to the correct final position....assuming its not a mile off to start with. PS don't forget to check that the OP36 screw is not too long if you are fitting a new one. Best of luck Tatty [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin oil pump fitting
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