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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
1951 Black Shadow Restoration
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<blockquote data-quote="timetraveller" data-source="post: 145306" data-attributes="member: 456"><p>From the photographs I do not know the size of the washer/shims but I cannot see where they would go unless it is somewhere on the dynamo drive shaft. There are several problems. First there are both tapered and parallel input shafts depending upon whether one has a Miller or Lucas dynamo so I cannot see where these shims would go. Seondly as I found out during the Walkernator development the rear of the raised part of the primary drive which takes the dynamo drive has at least three different configurations. Some have the tapered hollow cast in, some have it machined in and some do not have a hollow at all but are flat at the rear. These differences will all make it difficult to position the Alton/dynamo input shaft in the correct in and out postion. I got round it with the Walkernators by providing a large section, very soft 'o' ring type seal. These were nitrilerubber for engine oil lubrication and silicon rubber tubing if ATF was used in the primary drive case. In both cases I provided a length of the tube or 'o' ring section and this had to be cut to the correct length and then glued. This seal is then trapped between the back of the primary chain case and the end of the dynamo replacement in the kit. The seals are sufficiently 'squidgy' that they can be used to tune the position to allow the sprocket to line up with the centre run on the triplex chain. Perhaps the Spares Company will tell us just what these items are used for. I'm not only stumped but also flumoxed. Good old northern words.</p><p>Going back to Craig's query about the amount of oil to put into the primary chain case; there is a level bolt so supposing the the bike is more or less horizontal front to back you can just take out that bolt, fill up until oit starts to flow out and then put the bolt back in place.</p><p>Gary's contribution just came in while I was typing this so perhaps he can tell us exactly which shim it was and where it went.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 145306, member: 456"] From the photographs I do not know the size of the washer/shims but I cannot see where they would go unless it is somewhere on the dynamo drive shaft. There are several problems. First there are both tapered and parallel input shafts depending upon whether one has a Miller or Lucas dynamo so I cannot see where these shims would go. Seondly as I found out during the Walkernator development the rear of the raised part of the primary drive which takes the dynamo drive has at least three different configurations. Some have the tapered hollow cast in, some have it machined in and some do not have a hollow at all but are flat at the rear. These differences will all make it difficult to position the Alton/dynamo input shaft in the correct in and out postion. I got round it with the Walkernators by providing a large section, very soft 'o' ring type seal. These were nitrilerubber for engine oil lubrication and silicon rubber tubing if ATF was used in the primary drive case. In both cases I provided a length of the tube or 'o' ring section and this had to be cut to the correct length and then glued. This seal is then trapped between the back of the primary chain case and the end of the dynamo replacement in the kit. The seals are sufficiently 'squidgy' that they can be used to tune the position to allow the sprocket to line up with the centre run on the triplex chain. Perhaps the Spares Company will tell us just what these items are used for. I'm not only stumped but also flumoxed. Good old northern words. Going back to Craig's query about the amount of oil to put into the primary chain case; there is a level bolt so supposing the the bike is more or less horizontal front to back you can just take out that bolt, fill up until oit starts to flow out and then put the bolt back in place. Gary's contribution just came in while I was typing this so perhaps he can tell us exactly which shim it was and where it went. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
1951 Black Shadow Restoration
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