mookaloid
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| posted on 19/9/09 at 09:56 PM |
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Nipples
Further to the broken wishbone thread I was thinking of fitting grease
nipples to my wishbones so that I can pop a dose of suitable grease in from time to time.
Does anyone think this is a good idea?
Cheers
Mark
"That thing you're thinking - it wont be that."
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ReMan
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| posted on 19/9/09 at 10:01 PM |
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I think it would be nice to be able to grease as you suggest, and it would help to stop them squeeking.
But if they are incorrectly adjusted to start with it aint going to stop them breaking
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prawnabie
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| posted on 19/9/09 at 10:07 PM |
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Will introducing a hole into the bush tube not weaken them in the same way as the burn hole did?
Just throwing ideas round!
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mookaloid
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| posted on 19/9/09 at 10:14 PM |
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quote:
Originally posted by prawnabie
Will introducing a hole into the bush tube not weaken them in the same way as the burn hole did?
Just throwing ideas round!
I wondered about that too but I think I would put the hole for the nipple on the top of the tube in the middle so it wouldn't be near the weld
"That thing you're thinking - it wont be that."
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prawnabie
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| posted on 19/9/09 at 10:18 PM |
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Yes, I suppose the burn hole catching the end of the tube makes all the difference too. It would be like trying to tear a piece of paper from the
centre, as opposed to end if you see what I mean!
HTH
Shaun
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Mark Allanson
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| posted on 19/9/09 at 10:20 PM |
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The ideal way would be to upgrade to M14 and drill out the centre of the bolt and fit a nipple in the hex end and cross drill for a grease outlet.
Putting a nipple in the tube part of the wishbone is just asking for trouble
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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britishtrident
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| posted on 19/9/09 at 10:27 PM |
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I really don't know why everybody uses poly bushes, the "Silentbloc" bonded rubber was invented back in the 1920s to solve the
problem.
In a rubber bush all the rotational movement is accommodate by the torsion of the rubber --- no rubbing friction nothing to seize.
Book style Triumph rubber bushes are actually less compliant to side force than most poly bushes.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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designer
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| posted on 19/9/09 at 10:31 PM |
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Polybushes are dsigned to be 'dry' in use, not lubricated.
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Howlor
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| posted on 20/9/09 at 07:50 AM |
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They are difficult to get hold of! 
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MikeRJ
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| posted on 20/9/09 at 10:56 AM |
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quote:
Originally posted by designer
Polybushes are dsigned to be 'dry' in use, not lubricated.
They do need lubrication to prevent squeaking and premature wear. The
soft(ish) polyurethane used in suspension bushes doesn't have particulary good self lubricating properties IME.
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rusty nuts
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| posted on 20/9/09 at 11:31 AM |
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As someone already pointed out on the other thread I suspect that the vast majority of suspension arm failures are down to the crush tubes being too
short causing the arms to bind on the pivot point which in turn causes the arm to fail . Crush tubes have been covered several times . Sorting the
crush tube issue made my car a hell of a lot better to drive as I'm sure it has for others
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PAUL FISHER
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| posted on 20/9/09 at 01:40 PM |
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With out wanting to sound patronising.
I think the key point to be made is,as with any vehicle,but particularly with a self home built vehicle,and a very high performance one at that,you
can't just leave it until something fails,which results in a breakdown,damage to your vehicle,or a accident,you must ensure you have a
preventative maintainance system in place.We are all aware of various problems and failures and common faults we have on our cars,not only crush tubes
and poly bushes,but other item's by no means exhaustive list,but includes,rear camber wishbone nuts coming loose,rubbing brake pipes and fuel
pipes,bike engine drive coupling nuts and drive shaft torx bolts coming loose,etc etc,so these must be built into our service schedule,I would say 99%
of us service our own kit cars,so we are responsible to ensure its done correctly.
I would suggest these wishbones and all other suspension components should be stripped down once a year,any corrosion that has built up removed,and
re-lubricated,then built back up and ensure it is still functioning as it designed,should be part of your preventative maintenance.
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flak monkey
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| posted on 20/9/09 at 02:40 PM |
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quote:
Originally posted by Mark Allanson
The ideal way would be to upgrade to M14 and drill out the centre of the bolt and fit a nipple in the hex end and cross drill for a grease outlet.
Putting a nipple in the tube part of the wishbone is just asking for trouble
No need to upgrade to do this IMO. M12 is well over specced for suspension bolts on our cars anyway (12.9 M8 would have been nearer the mark but I bet
people wouldnt feel as 'safe' .
I for one wouldnt worry too much. If your bushes are made correctly with the correct length crush tubes then you shouldnt have any siezing
problems.
As for lubrication, mine were lubed with moly grease when I assembled them 2 years ago. They still creaked and squeaked as soon as the car was on the
road. 6000 miles later they are still free to move, without any slack. And I have only just taken them off for a service 
David
Sera
http://www.motosera.com
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