Suspension Bush Removal
Posted: Sun Apr 13, 2008 9:28 am
Stripping down my rear suspension I decided to replace the old rubber bushes with a set of Sue Miller Superflexes (took ALL of my pocket money!).
I have read most of the forum comments on removing old bushes and proceeded to set up suitable (old) sockets on my fitters vice. No way Jose! 3 foot levers and all.
Other suggestions from knowledgeable people (mmmm...) included filing, sawing and blowtorch. I didn't fancy any of these as the rear wishbones are typical Lotus and, to my mind, relatively delicate. The chances of introducing stress raisers by nicking the tubes seemed very difficult to avoid.
After an evenings thought I hit the CAD package, emailed off the drawings to my friendly machinist at 11pm (my garage not big enough for a lathe) and received a call the next day to say that the extractors were in the post.
2 days later snailmail arrived and 2 hours in the garage saw all 8 bushes out VERY cleanly. It could have been quicker, but I designed the extractors to first remove the sleeve plus the rubber and then, with a second operation to remove the troublesome outer sleeves.
I claim nothing original here but I could not find any extractor detail on the forum and thought others might find the information useful. The dimensions I used are not necessarily optimum as they had to be measured with the bushes in place. They do however work!
Anyone interested can PM me for PDF drawings. My man charged me ?50 for the set, including material and is willing to do more but I suspect others may wish to use their own facilities.
(If you are in Surrey, hire my set!)
I have read most of the forum comments on removing old bushes and proceeded to set up suitable (old) sockets on my fitters vice. No way Jose! 3 foot levers and all.
Other suggestions from knowledgeable people (mmmm...) included filing, sawing and blowtorch. I didn't fancy any of these as the rear wishbones are typical Lotus and, to my mind, relatively delicate. The chances of introducing stress raisers by nicking the tubes seemed very difficult to avoid.
After an evenings thought I hit the CAD package, emailed off the drawings to my friendly machinist at 11pm (my garage not big enough for a lathe) and received a call the next day to say that the extractors were in the post.
2 days later snailmail arrived and 2 hours in the garage saw all 8 bushes out VERY cleanly. It could have been quicker, but I designed the extractors to first remove the sleeve plus the rubber and then, with a second operation to remove the troublesome outer sleeves.
I claim nothing original here but I could not find any extractor detail on the forum and thought others might find the information useful. The dimensions I used are not necessarily optimum as they had to be measured with the bushes in place. They do however work!
Anyone interested can PM me for PDF drawings. My man charged me ?50 for the set, including material and is willing to do more but I suspect others may wish to use their own facilities.
(If you are in Surrey, hire my set!)