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Old 26-01-14, 23:06
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Alastair McMurray
 
Join Date: Sep 2006
Location: Lincoln, England
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Default Bogie rear fork pivot seal

You will know there are two rubber reals in the pivot pin assembly, does anyone have a NOS one they could measure for me. The ones that came out out of mine were badly perished so I don't trust the dimensions. If anyone just happens to have eight NOS ones going spare please drop me a line before I make a set. BA is down to his last one :-(



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Last edited by ajmac; 26-01-14 at 23:52.
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  #2  
Old 27-01-14, 00:44
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Lynn Eades Lynn Eades is online now
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Join Date: May 2003
Location: Tauranga, New Zealand
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Al, see my thread "Carrier soft parts" Not a lot of help I am sorry.
The seal is about 10mm thick. It has a smaller inside dia. at one end (just a gentle lip), and the o.d. is concave. I believe the seal works by the end load on it. It does not move relative to the steel it bears against, but twists internally.
The lip on the inside is to seal in the grease, and is a snug fit on the shaft.
I have some original NOS, but not enough. I have a friend who made a mould (because he owed me) and made me a set, but didn't want to make any more.
He had a tool for testing the hardness of the rubber (neoprene, what ever) and chose a suitable material based on that. I was happy with the result, but cant get any more. That is back home in N.Z. I am currently living in Western Australia.
Others over your way are possibly holding original ones, and will be able to give an exact width.
I hope that help a little.

I will add that the Australian made ones for the LP2 /2A as NOS in a box of 8, are (in my experience) hard and brittle and break easily. The shafts and clearance is probably the same, and I could therefore see a shortage of them here as well.
I have tried to soften them with no success.
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Last edited by Lynn Eades; 27-01-14 at 01:04.
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  #3  
Old 27-01-14, 01:29
Andrew Rowe Andrew Rowe is offline
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Default Bogie Fork Shaft seals

Hi Alastair, in the past I have water jet cut out these seals out of rubber( 10mm thick ) that is resistant to oil. They actually do bugger all in the scheme of things , other than the barrier for the greese coming out of the shaft, the special lips Lyn talks about is an example of good British engineering in wartime production.
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  #4  
Old 27-01-14, 19:13
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Alastair McMurray
 
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That's what I was going to do Andrew, I figured that so long as the faces seal nothing can get in or out of the interface with the bushes.
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