PhilExe Posted March 6, 2019 Report Share Posted March 6, 2019 Having dismantled the front suspension on my TR3A I'm trying to re-assemble the trunnions. New steel bushed will press into the end of the lower wishbone arms but are fairly tight. The trunnion spigots however will not fit into the bushes once there in place. The whole assembly seems to be just to tight a fit. I'm tempted to ream out the hole in he lower wishbone a little. Does anyone have any experience of fitting new trunnions and what the various measurements for the lower wishbone hole etc should be, and how tight a fit it should be? Thanks in anticipation. Phil Quote Link to post Share on other sites
ewan2 Posted March 6, 2019 Report Share Posted March 6, 2019 Phil I think the bushes should be pressed into the wishbone and then reamed out to a good fit. I replaced mine a year or so ago and the bushes were different from the bushes I used previously as they did not need a great deal of reaming. Ewan Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 6, 2019 Report Share Posted March 6, 2019 Stock reamer size is 0.625" (5/8") for lower outer wishbone bushes to fit new trunion pin. Peter W Quote Link to post Share on other sites
roger murray-evans Posted March 6, 2019 Report Share Posted March 6, 2019 (edited) For those interested, I've attached a couple of photos of Baby and Big Tenax just because I've nearly mastered Windows10 and I can! Roger M-E Edited March 6, 2019 by roger murray-evans wrong thread! Quote Link to post Share on other sites
Drewmotty Posted March 6, 2019 Report Share Posted March 6, 2019 They usually need reaming. I bolt the arms to the spring pan and ream them both straight through to at least try to get them lined up. Quote Link to post Share on other sites
John McCormack Posted March 7, 2019 Report Share Posted March 7, 2019 They are designed to be reamed to fit. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 7, 2019 Report Share Posted March 7, 2019 'Oilite' bushes are offered and used as direct replacements for the original steel backed bushes. The 'Oilite' bushes I have used did not require reaming to size. They do need a greaser/oiler hole drilling radially to align with the grease nipple in the outer arm. The steel backed bush 101615 is not as expensive as the 'Oilite' item. https://www.bearingboys.co.uk/?catid=2567&display=&orderby=&att1=5%2F8inch&att2=3%2F4inch&att3=1inch Peter W Quote Link to post Share on other sites
mikej Posted March 7, 2019 Report Share Posted March 7, 2019 Phil, reaming the bushes is normal, use an adjustable parallel reamer if you can. You may want to check the diameter of the mating pin to ensure it is not over-size, the last set of new trunnions I bought were dimensionally challenged! Cheers, Mike Quote Link to post Share on other sites
PhilExe Posted March 8, 2019 Author Report Share Posted March 8, 2019 Thank you all who replied very helpful. I can now sort myself out. Cheers Phil Quote Link to post Share on other sites
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