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kimber
United Kingdom
1526 Posts |
 Posted - 12/03/2020 : 15:18:49
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I am in need of one of these washers.
The two that I have are different in respect of the positioning of the serrations in relation to the square locating spigot. See accompanying diagram.
Type A is a nice fit on my original early type screen with the serrations fully engaged whereas Type B does not fit because the serrations cannot engage as they are positioned differently.
I am therefore seeking another as per type A.
There could be several explanations as to why there should be this difference. For example, maybe the early and late-type 'screen differed in this respect?
Anyone else come up against this problem?
Sorry about the inverted pics. |
Edited by - kimber on 12/03/2020 15:20:26 |
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Richard Hardy
United Kingdom
2138 Posts |
Posted - 12/03/2020 : 21:01:37
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Are they the same thickness Andrew as the Riley Sprite used a thinner one and may possibly have different serrations
Rich
Vintage MG Parts |
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Robert R
Austria
320 Posts |
Posted - 13/03/2020 : 08:54:10
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Hello Kimber!
For me, the teeth are also different. The problem is also here.
Can someone help?
I would look for someone who offers the manufacture for the old system.
Robert (F1164) |
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Gerhard Maier
Germany
864 Posts |
Posted - 13/03/2020 : 09:49:36
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On my NA0468(ND) these serrated washers fit exactly, but the number of serrations is not the same on both sides.
So I must care, that I never mix them up.
Left I have 29 serrations and right there are only 28 serrations.
Could that be the problem in your cases ?
Gerhard |
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Robert R
Austria
320 Posts |
Posted - 13/03/2020 : 10:27:54
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The number of teeth on my discs is 28 (old) and 28 (new). For me the problem is the teeth are staggered. See pictures above for my posting.
Robert (F1164) |
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Gerhard Maier
Germany
864 Posts |
Posted - 13/03/2020 : 12:11:33
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When you look at my washer below, you will see, that the inner diameter
of the washer is left open from serrations.
So there is no risk, that the serrations can collide with the area indicated by the red arrow.
Could that also be a problem ?
Gerhard
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kimber
United Kingdom
1526 Posts |
Posted - 13/03/2020 : 16:25:34
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Well, there’s a can of worms I did not expect to be opening!
Thanks for the replies chaps.
Richard: There is a marginal difference in thickness of the 2 different washers I have (type A being 6.8mm and type B 7.1mm) although, with respect, I cannot see how that would have any bearing on the alignment of the serrations.
Robert: Very interested to hear that we are apparently both struggling with the same issue.
Gerhard: The plot thickens! All of the components I have are 28 serrations. How strange that your car has 2 different versions (28 + 29). I am interested to see that the serrations/splines on your car are only around the outer edge of the washer.
In my case, the face of the threaded boss attached to the windscreen (pic below) is also serrated/splined whilst yours is not. (On reflection, I think ‘splined’ is probably more accurate).
Thinking about it, a quick/simple solution for me might be to replicate the set-up on your car by removing the splines from that component because, as the arrangement on your car demonstrates, they are not vital. The 2 square spigots alone appear to be sufficient to anchor the washer once the B nut is tightened.
That said, my preferred solution would be to source another washer of the appropriate type.
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Edited by - kimber on 13/03/2020 16:35:13 |
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Westbury
United Kingdom
1949 Posts |
Posted - 13/03/2020 : 16:36:00
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Hello, Andrew.
I understand the splines are there to enable you to adjust the rake of the windscreen.
Chris |
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Gerhard Maier
Germany
864 Posts |
Posted - 13/03/2020 : 17:06:38
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Andrew,
just for clarification the photo below.
Gerhard
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kimber
United Kingdom
1526 Posts |
Posted - 13/03/2020 : 17:28:04
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Gerhard, Chris
Thanks for your further input on this. It is helpful.
I understand how the mechanism works but I think I can get round the issue I have by modifying the parts I have to end up with something close to Gerhard's set-up.
Gerhard, I note the presence of a spring in your most recent picture - That is a good idea and not something I have previously seen. I can see why that would be beneficial.
Still hoping someone might have a spare washer (Type 'A' in my initial photo/drawing). |
Edited by - kimber on 13/03/2020 17:32:20 |
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Richard Hardy
United Kingdom
2138 Posts |
Posted - 13/03/2020 : 22:00:18
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Hi Andrew
I only mentioned the difference in thickness to illustrate that there may have been variations for different marque applications. These may then have been swapped over time onto other cars and not necessarily have performed correctly
Rich
Vintage MG Parts |
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kimber
United Kingdom
1526 Posts |
Posted - 13/03/2020 : 22:42:45
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quote:
Originally posted by Richard Hardy
Hi Andrew
I only mentioned the difference in thickness to illustrate that there may have been variations for different marque applications. These may then have been swapped over time onto other cars and not necessarily have performed correctly
Rich
Vintage MG Parts
Fair comment.
I have seen fittings of this type on Auster screens in front of rear seat passengers on open 4-seat vintage cars e.g. Bentley. They certainly look very similar but whether they are identical I don't know. |
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Moth eaten
Australia
939 Posts |
Posted - 16/03/2020 : 07:48:09
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Frankly these serrated washers are very crudely cast, but that's Morris Garages. Its the way things were done then.
N.D.Willey |
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Peter Frost
United Kingdom
56 Posts |
Posted - 16/03/2020 : 18:22:12
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This is not a simple spring. Pictures of holes and side rebate for the spring are shown in the pictures below. Does anyone know what the spring should look like?
On the arm that mounts onto the body, there is a serial number stamped on the backside of the serration and this number is also stamped on the serrated washer fitted to it. I image this is a rare occurrence.
I have a mix of 28 & 29 teeth on my pair of arms.
Peter
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