tegwin
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| posted on 6/6/08 at 10:28 PM |
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Upright pivots....confused!
I am having some issues....
Putting my car back together after painting it....(before anyone pipes up at the back...these are old photos...my painting isnt that poor  )
How is this front upright supposed to pivot?
Where the upright is bolted to the lower rosejoint, is the rosejoint supposed to rotate, or should that little shaft rotate inside the upright?
After re-assembling it, one site rotates around the bolt, thus not requiring the lower rosejoint to rotate...
And the other simply rotates the ball joint...
How is this setup suposed to work so I can get this right
[Edited on 6/6/08 by tegwin]
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Miks15
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| posted on 6/6/08 at 10:40 PM |
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i dont know for definate but i would have said it was the balljoint that rotates not the bolt.
This is my thought just from taking off normal car balljoints. Just think how tightly the balljoint is inside hole. I dont think there should be any
play what so ever so enough for the bolt to rotate surely is too much?
I could be wrong as its a different set up and mabye its meant to be like that but from what i can think i would have said balljoint should turn and
the bolt should stay tight
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Mark G
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| posted on 6/6/08 at 10:42 PM |
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I think the rose joint is supposed to rotate, Perhaps the side where the bolt is rotating isn't tight enough?
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tegwin
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| posted on 6/6/08 at 10:43 PM |
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That was my thought...
But if that is the case..
Why is there a greece nippled on the housing for the bolt (middle of the pic), almost as if theere should be rotation there
[Edited on 6/6/08 by tegwin]
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indykid
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| posted on 6/6/08 at 10:48 PM |
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the grease nipple suggests it's some sort of trunnion arrangement. (trunnion is the nearest word i can find to explain what i mean)
ETA: is it supposed to be a king pin arrangement? the top and bottom pivots look to be very well aligned. does the top have a grease nipple too,
perhaps pocketed into the back of the steering arm?
don't know what the upright are from to decide what's supposed to do what though but i'd imagine it is supposed to turn.
tom
[Edited on 6/6/08 by indykid]
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Miks15
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| posted on 6/6/08 at 10:50 PM |
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hhmmm good point didnt notice the grease nipple. Is there a bearing or anything where the bolt goes through? I wouldnt have thought that it would just
rotate on the bolt and it wouldnt be very effecient. Mabye if there is a roller bearing or something inside which is meant to pivot then mabye its
right.
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MikeRJ
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| posted on 6/6/08 at 10:54 PM |
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In the original application it wouldn't have had rose joints, almost certainly some kind of trunion arrangement. It should be made tight in
this instance, if it's turning then it has some clearance which will be be adding to unwanted movement.
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tegwin
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| posted on 6/6/08 at 10:56 PM |
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There is a brass(?) sleeve inside the upright that the bolt sits on and rough washer seals either end....
The top and bottom lighn up perfectly..
The top one does have a greece point, but it has been modified so it can not rotate and relies on the rosejoint to do the roation..
The bottom one does not seem to have been altered atall...
I wouldnt have noticed atall if both sides were behaving the same way, but they arnt...obviously!
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indykid
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| posted on 6/6/08 at 10:57 PM |
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just noticed the top has a grease nipple too (on the side) so my money is it being derived from a king pin arrangement and 2 bolts replace the single
pin, and the air gap in the middle is where the axle would have sat previously.
tom
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D Beddows
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| posted on 6/6/08 at 10:57 PM |
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Take it you're too scared to ask the people who would probably actually know the answers to your questions about this car ie doing something
like clicking on the following words...... 750 Formula Forum
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britishtrident
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| posted on 7/6/08 at 08:40 AM |
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Looks like converted king pin upright --- I suspect BMC in origin not sure the model could have come ftom anything from an Austin A40 or MG Midget to
a Morris Oxford.
If that is the case I were doing it I would pin adaptors that the go on to the "Rose" joints so as not to rotate in the upright..
However it appears the original king pin bush is still in place -- at least in the lower joint which is "a bit iffy".
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tegwin
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| posted on 7/6/08 at 09:34 AM |
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Chears for the input....Think I might look into locking out the "king pin" and using the rosejoints to pivot on..... Makes more sence..
I would ask on F750 but they are not too happy that I have violated a f750 car by putting in a stonking great bike engine....
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