My McDougleator also uses a steel drive cog, But has a built in slipper clutch.
Cheers Bill.
Cheers Bill.
Misc: Everything Else 1951 Black Shadow Restoration
- Thread starter craig
- Start date
Some where it talks about them being used as a way to shim the dynamo in and out to get the mesh centralized in the chain with a Miller dynamo. Does that sound right?
I look forward to seeing what Craig does. I too thought he needs touch more back lash.
In the Richardson book, there's mention of a chirping (I think that's he word) noise caused by insufficient backlash of the dynamo drive sprocket. He says many owners thought it was coming from the clutch. My bike had that when I first mounted the Alton. I wound up using one of those shims under the mount to fix it. Many thousands of miles later, no noise and no trouble -- with the plastic sprocket.
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.
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.
They are used on twins only. See M036. They are used between the dynamo and the case to achieve centralising the gear in the chain.
So they are two inches diameter or so? OK, now I see them.
The shim I mentioned goes below the dynamo mount (ET221? I have a D so maybe it's different), so as to lift the dynamo a bit. I bought it from Coventry Spares here in the USA. The shim seems to be part number ET232.
I failed to mention that in my first attempt, I left out the oil slinger and goobed (Shakespearean word) it up to try to seal it. Naturally, that didn't work so when I fixed the noise problem, I also installed the slinger and all has been well since.
I failed to mention that in my first attempt, I left out the oil slinger and goobed (Shakespearean word) it up to try to seal it. Naturally, that didn't work so when I fixed the noise problem, I also installed the slinger and all has been well since.
That is the kind of shim I have seen before. Quite rare in my experience so I don't know what happened with some bikes that they are required.
Pays to look a little more thoroughly, as I did not see the shim on this page in the spares book. Thanks to the spares company for spelling it out and taking more of my money.
