Avoneer
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| posted on 1/9/07 at 09:17 PM |
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Trailing arm poly bush failure
Hi All,
At elvington today (clockwise circuit), the poly bush on the nearside top trailing arm (axle end) gave up.
I've yet to dismantle and see exactly what's failed, but they were originally from ARA and looked a bit farty.
Will update once I know more.
Best course of action???
New bush or cut off the eye and replace with a threaded steel top hat and use a rod end?
Cheers,
Pat...
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omega 24 v6
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| posted on 2/9/07 at 10:19 AM |
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Mines not roaded yet but this was a concern for me and I did cut off the axle end eyes and replace with rod ends,
If it looks wrong it probably is wrong.
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russbost
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| posted on 2/9/07 at 10:20 AM |
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The most common cause of poly bushes failing is that either the tube is rotating round the bolt (rather than the bush round the tube) or that the
whole lot is being clamped up solid cousing the bush to shear to give any movement at all. I would have a good look at how it's all located.
Generally poly bushes will outlast rod ends by a long way.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Peteff
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| posted on 2/9/07 at 10:29 AM |
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Are your Panhard rod bushes alright Pat? They take a fair pounding and might be allowing some sideways movement.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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RazMan
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| posted on 2/9/07 at 11:47 AM |
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I would just put new poly bushes in - rod ends won't last half as long.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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indykid
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| posted on 2/9/07 at 03:47 PM |
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just to clarify the situation, it's not that the bush has sheared or parted company in any way, but it's like the poly element has
squashed down and compressed so that overall, the top of the axle can move forward and back relative to the trailing arm.
unless it's just absolute crap quality polyurethane in the bushes, i can't see how replacing the bush is going to change anything, as next
time it's out on track it's going to do just the same and lunch another tyre.
having said that, my mk poly bushes on my wishbones have been fine, so maybe it just needs a good quality polyurethane
tom
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gottabedone
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| posted on 3/9/07 at 12:24 PM |
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Tom,
So the bush has squashed along the it's length? What about the sleeves between the bush and the bolt?
Steve
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