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Post by James W on Sept 30, 2004 13:23:25 GMT 11
I've had yet another front wheel bearing go duff.
This time due to the c-clip comming off the CV shaft and the rear seal behind the hub not being held water tight.
... and I thought I had fixed the problem changing to Aisin hubs... The other side is fine though.
I have for some time now thought about putting low pressure air into the wheel hub itself to improve waterproofing. But having a look it's not going to be simple as I thought.
I was thinking of drilling a small hole in towards the CV shaft near the upper ball joint, in a simular axis as the upper ball joint bolts.
Then dill and tap for a small nipple for a small air hose, a simular arangment as a grease nipple.
But I realised when I had a look I will be driling in towards and possibly though the small needle roller bearing for the CV shaft.
Has anyone done anything simular or have any cunning plans without removing the small needle roller bearing?
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Garth
Isuzu Senior
1989 Bighorn Irmsher R LWB
Posts: 164
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Post by Garth on Oct 7, 2004 11:15:26 GMT 11
It is certinally something to think about but as of yet I haven't come up with any cunning plans. Am geting a new set of stub axles etc for the front so might have a play around with my old ones and see what I can come up with
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Post by geeves on Oct 7, 2004 15:22:49 GMT 11
If you drill through the stub axle casting you will have wof issues but you might be able to drill through the metal center of the seal for the half shaft at the back of the stub axle assembly You would need to look closly at this before proceding I dont know if the metal part is a stationary part.
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Post by James W on Oct 8, 2004 7:18:47 GMT 11
I had thought it would weaken the stub axle, especially if a big hole or done badly. I han't thought it would be a WOF issue, but certainly I don't won't to get caught up in any debate at my next WOF.
I not sure what you mean by the "meatal center of the seal". I have to think about it some more. Currently nothing is happening anyway as the idea doesn't really work out. Some more thought required
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Post by Mark Smith on Oct 8, 2004 14:37:57 GMT 11
. I have for some time now thought about putting low pressure air into the wheel hub itself to improve waterproofing. But having a look it's not going to be simple as I thought. quote] Please excuse my ignorance here, but wouldn't having a lower air pressure in there actually try to suck in water ? (nature abhorring a vacuum and all that) Wouldn't a higher pressure be better ? Sort of the way a deep sea submarine works. Assuming what you are suggesting is possible of course :-) |
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Post by James W on Oct 8, 2004 14:59:04 GMT 11
Low pressure but not lower pressure.
Only say 4psi above atomsphere so all the seals don't blow but will still be positive pressure at say 1 meter depth water.
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MattMU
Isuzu Senior
Rodeo Now!
Posts: 206
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Post by MattMU on Oct 8, 2004 15:05:39 GMT 11
HMMMMM, Mark Im going to go out on a limb and answer for James here. But I am quite certain they are not going to hook up a vacuum to this airline but pressure. But you wouldnt want high pressure, that would tend to blow all the grease out of the wheel bearings so you would want a low (high) pressure!!  So not actually talking low as in 'below atmospheric', but low as in just above atmospheric but not too high! But yes you are most certainly right, any low pressure (vaccum) in the hubs would draw in the contaminates from outside. The same way quenching a hot hub or axle in water sucks the water in(oops sorry nothing sucks, its forced in by the higher atmospheirc pressure but you get the point).  Clear as mud??? Matt |
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Post by geeves on Oct 8, 2004 15:52:49 GMT 11
I had to replace this seal on mine The new seal is a solid metal ring with a rubber lip inside and out As I got a mechanic to do it I didnt see how it fits
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