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  #16 (permalink)  
Old 02-19-2008, 09:15 AM
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sprint750 sprint750 is offline
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Burman box O rings

I'm not trying to hitchike this thread but as far as steering boxes are concerned, everybody speaks about rebuilding and replacement of 'O' ring seal on early Burman Boxes.

What is the exact dimension (metric) and grade(material) of the O ring ?

Did not remove the one in my own boxe yet but I would like to have the size to order a new one before dismantling.

BTW this O ring is not available through the usual Alfa parts specialists here in France. Only the latest version (oil seal, spring loaded) is available.
I suppose that industry suppliers should be able to supply but I'm afraid they will ask me to order a bunch of 50 !

regards
sébastien
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Old 03-02-2008, 03:43 AM
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The O-ring is 1 3/8 inches (outer diameter) by 1 1/4 inches (inner diameter) and I don't know whether the material is particularly special. When I rebuilt my RHD Burman box a few months ago, the local bearing place sold me one for 40 cents (~ 25 Euro cents).
Chris
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Old 05-01-2008, 01:41 AM
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A couple of weeks ago I bought a few spares from a Series 2 Coupe that had been written off (rear-ended). One of those spares was the RHD Burman steering box. Before carting away my booty, I asked the distraught owner about his ex-car. He was the third owner, he bought it in 1990, and had used it just about every day until it was totalled about two months ago. One of the things he had repaired when he bought it was the bottom steering box seal as the box was leaking. To his knowledge, the box had not been touched since.
When I dismantled the box in my shed, I found that it was full of the most disgusting black/grey thick, viscous grease (attached photo) - it really looked about 18 years old and had the oddest odour. To get to the point, all of the load bearing surfaces in that box were perfect - not a sign of wear - and the cast casing, whilst filthy, was intact - no cracks, no splits. The local engineering shop confirmed all of this.
I know that this is an anecdote and a statistical trial of 1, but the grease seems to have done the job. Obviously, credit also goes to the mechanic who rebuilt it and set it up so well all those years ago.
Just thought you guys would like to know.
Chris
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Old 05-01-2008, 12:28 PM
PiperYelloGTV2k PiperYelloGTV2k is offline
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black grease in Chris1750s box

Chris, the "disgusting black/grey thick, viscous grease" to which you refer above might be a molybdenum sulphide grease which is inherently black. I use to inject it with a grease-gun mixed 50/50 with EP90 gear oil into the king pins (steering swivels) of my MG Midget.
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Old 05-01-2008, 12:48 PM
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Maybe either that or "CV joint" lube which is nasty stuff right out of the box.
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Old 05-01-2008, 05:13 PM
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Whatever it was, and you're right - it probably was MoS2 grease - had done the job. That, and the initial shim setup. Either way, it'll get repacked and installed in my car as the current steering box is a little worn at the load bearing end of the main worm drive.
Oh yeah - I'll be keeping the tyres a standard width also.
Ci vediamo,
Chris
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Old 05-08-2008, 09:51 AM
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Does anyone know where to get the metal washer/seal at the bottom of the box?
Thanks
Jeff
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