Interesting how all the old threads are showing up again. When I started this thread many years ago I had a drawing (somewhere) of the bushes I made. I found the hows, whys, and instructions for this modification. Some of this may be helpful.
Things to consider:
1) pin, rocker & linkage diameters were measured using a dial vernier calliper with 0.05mm increments, not the most accurate tool for this. Third decimal places were guesstimated by me. To convert mm to inches divide mm by 25.4, e.g., 20.003mm / 25.4 = 0.7875”.
2) diameters shown for pins, rocker & linkages were derived from averaging all the dimensions I measured. It is not practical to make a bush for each specific location.
3) bushes are longer than standard bearings and don’t leave a lot of grease cavity, shorten them if you want.
4) from memory (I did this a few years ago) 1 bush had to have its inside diameter opened up a bit and 2 bushes had to have their outside diameters reduced a bit, I did all of this by hand using fine emery cloth. The reason for this is a combination of tolerances, averaging of measurements, and poor measuring by me.
To remove the original bearings I placed cloth over a vice and draped between the jaws, then sitting the rocker on the vice with jaws opened just enough to let the bearing out I used a suitable sized socket as a drift and hit the bearing out.
To fit the new bush I placed heavy cloth over the vice as above and using the same socket as above, placed all pieces between the jaws & pressed the bush into its hole in the rocker until it was centred equally (measured this with vernier depth gauge). Do not bother with anti seize or lubricant as this is an interference fit and the anti seize will be scraped off. This method could be used to remove bearing but a packer would be needed to allow the bearing to come out.
Warning: when pressing the bushes in I “felt” 2 were too tight, that’s why I polished them down. I can’t describe “feel’, it is something you have naturally or have developed. If you are not confident in this have somebody who has the ability fit the bushes for you. If bushes are too large they will crack the aluminium body (die cast?) they go into. This is not good to repair, repair will be weaker than stock, and may distort the bore. Would you trust it? In this country where we eat the animals on our coat of arms the price would be about a slab of beer to have the bushes pressed in place. Not much for peace of mind.
Disclaimer: you are welcome to use the drawings & I offer them freely but take no responsibility for any problems or damage you may encounter. I haven’t had any issues yet.
That’s it, please let me know how this mod works for you.
Note that point 3 coincides with what T Cro stated in reply 43. Very little goes in. I use moly grease.
Regards, Russell
