Front Cone Removal Help
#1
Posted 30 November 2020 - 04:26 PM
Having issues removing one of my rubber cones, passenger side was fine tool lined up top arms out no problem.
However I can't get the driver's side to line up. It feels like it's getting a couple of threads on then pops off again. I have tried jacking the hub up to help align it but no luck. Have also tried removing rebound buffer and dropping it all the way down...that didn't work either.
Does anyone have any tips I can try. I don't know whether or not the threads have gone on the cone or just where it's sagged it won't line up. Car is a 1993 Mayfair so certain it has Metric threaded cones.
Is it possible/safe to cut the trumpet out at all. If I dropped the hub and suspension all the way down would that relieve some of the pressure. My cones that have already come off are very sagged and dead so not sure how much energy is left in them.
Any help would be appreciated.
thanks
Ed
#2
Posted 30 November 2020 - 04:38 PM
With the shock off, can you lift the top arm by hand? That will tell you roughly just how much force the cone is exerting.
Can you see the threaded section of the cone if you peer down through the crossmember? That will tell you if it is out of alignment.
It is possible to smash the aluminium trumpet with a hammer and chisel to remove it.
If the cone is well collapsed it is even possible to remove the top arm pin.
Neither are probably 'recommended' and both are at your own risk - keep your fingers well out of the way!!!
(I would never be too sure that both cones are metric - one may have been changed in the past)
#3
Posted 30 November 2020 - 06:45 PM
If I was to grind the trumpet in half (I know not recommended and comes with its own risks) although not sure I have much choice. Would it best to remove the rebound rubber to ensure top arm is at maximum drop?
I'm assuming cutting would be preferable to trying to remove the top arm as keeps hands more out the way?
Tia
#4
Posted 30 November 2020 - 06:47 PM
#5
Posted 30 November 2020 - 06:57 PM
#6
Posted 01 December 2020 - 07:55 AM
Have a close look at threads on the cone compressor - might benefit from dressing with a knife-edge file
#7
Posted 01 December 2020 - 01:16 PM
#8
Posted 01 December 2020 - 01:50 PM
#9
Posted 01 December 2020 - 08:21 PM
I have had to do this a couple of times. First drill some holes into the cone in a horizontal line to create a 'fault line". Then, whilst wearing eye and hand protection, use a 1" wide chisel and a club hammer to frscture the trumpet along the fault line. Once fractured it is easy to remove the loose bits.
Then remove the top arm and the cone will come out? Probably with a circle of trumpet still stuck to it.
Best to replace both trumpets with Hi-Lo's.
Edited by Cooperman, 01 December 2020 - 08:22 PM.
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