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DavidHill
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« Reply #15 on: 27 June, 2022, 08:16:17 AM » |
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thanks for the update Chris and Simon, i will contact Past Parts and see if they have anything similar!
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davidwheeler
Permanent resident
Posts: 1487
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« Reply #16 on: 28 June, 2022, 07:40:12 AM » |
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Mine had little spring steel washers with a fringe, a bit like a small crown but most of the fringe has broken off over the years. Seems to work OK without them.
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David Wheeler. Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
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DavidHill
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« Reply #17 on: 28 June, 2022, 08:53:41 AM » |
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Thanks all, I have contacted Past parts and they are not able to get hold of anything similar. It looks like i either fit a normal cup washer or flat washer or go with nothing at all...
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chriswgawne
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« Reply #18 on: 29 June, 2022, 06:50:25 PM » |
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Here are a couple of photos of Aurelia wheel cylinder springs and washers David showing their design. There are companies in Italy who make repro wheel cylinders so maybe they would have washers. I dont have their names to handhere in the UK but as soon as I return to Italy I will dig their names out.
Hope this helps.
Chris
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Chris Gawne
Mobile: 07778 216552
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DavidHill
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« Reply #19 on: 29 June, 2022, 09:03:33 PM » |
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thanks Chris, that's very helpful, I may be able to make something very similar...
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Jay
Megaposter
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« Reply #20 on: 05 January, 2023, 02:15:39 PM » |
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Having dismantled the rear brake cylinders, which I know haven’t been touched for approx. 50 years. I notice that the only intact washer was fixed to the rubber seal via a stem/stalk, and as the washer was attached to the spring, I can only think the purpose of these washers is make the spring and the 2 seals, one unit. Interesting as I strip 3 cylinders, they had all suffered the same issue where this stem had fallen off and jammed into either or both of the supply and bleeding ports. At first i thought they were o-rings but on close inspection they were the stalks.
So could be a bit of a design fault, and therefore not replicated on newer seal kits.
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Julian Wood, Kingston, London
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Raahauge
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« Reply #21 on: 05 January, 2023, 06:05:14 PM » |
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For interest, I am having trouble with an Augusta front wheel cylinder leaking slightly, I assembled it without the 'crown springs' as I didn't have any.
The problem I concluded is that when assembling the seals etc. on the car (nearly horizontal), it is difficult to get the spring to sit centrally and if it is offset it distorts the rubber seal slightly. Assembling on the bench vertically might be a reliable solution.
powertrackbrakes.co.uk can however supply springs with a flared end to resolve the issue. I have just ordered one so not yet arrived. Will post a photo when I have it.
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Kari
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« Reply #22 on: 06 January, 2023, 09:28:08 AM » |
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I can only write about the Augusta (Lockheed) brakes. I never had any problems assembling a wheel brake cylinder in situ. The spring will center as the cups are a conical shape inside and being submerged in brake fluid will help. The Augusta parts catalog does not show any crown washers at the ends of the spring. However, an original Lockheed catalog does show crown springs (washers).
Karl
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Raahauge
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« Reply #23 on: 08 January, 2023, 01:05:26 PM » |
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Kari, it appears that we have different seal types, I have heard yours referred to as "polo" type seals (after the mint) whereas mine are a simple cup.
Below is a photo of the original spring, that supplied to overcome the non availability of crown washers and the cup.
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