Barry Kemp Posted February 22, 2018 Report Share Posted February 22, 2018 Having replaced my front trunions recently I moved on to the rear ones.I was surprised to find that there is no way to lubricate them in-situ. Is this a design fault? The set of replacement trunions fit so tightly into the housing that it looks really difficult to get any lubricant around them. This only leaves the metal sleeve that can be lubricated - so why are there rubber seals that fit around the trunion/ between each of the two metal end pieces? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 22, 2018 Report Share Posted February 22, 2018 Probably to keep dirt out whilst allowing the joint to swivel around the sleeve; they don't move as much as the front ones do so don't need the same kind of lubrication. The bushes are a firm fit in the housing and rotate around the bolt whilst the metal sleeve prevents direct wear on the rubber. A squirt of copper grease into the metal sleeve will prevent the bolt from sticking to it. It's also amazing the number I've seen that are tightened up fully with no mission of ever moving as they were designed to. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 22, 2018 Report Share Posted February 22, 2018 To add , the fronts you are oiling the swivel for steering , not the trunion suspension pivot which is the same as the rear Its a dry bush a, crush tube that rotates in the bush and the nasty tin shrouds and 0 rings seals same front and rear to keep water and road dirt out of the bushes Link to comment Share on other sites More sharing options...
PeteH Posted February 26, 2018 Report Share Posted February 26, 2018 On 22/02/2018 at 7:19 PM, Colin Lindsay said: Probably to keep dirt out whilst allowing the joint to swivel around the sleeve; they don't move as much as the front ones do so don't need the same kind of lubrication. The bushes are a firm fit in the housing and rotate around the bolt whilst the metal sleeve prevents direct wear on the rubber. A squirt of copper grease into the metal sleeve will prevent the bolt from sticking to it. It's also amazing the number I've seen that are tightened up fully with no mission of ever moving as they were designed to. The Bolt is tightened onto the Inner Sleeve, If it locks the Trunnion up solid, then I would suggest the machining of the Sleeve lengthwise is incorrect?. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 26, 2018 Report Share Posted February 26, 2018 yes the sleeve/bush must be locked up between the dust cups and against the upright the design is as such the bush rotates about the sleeve , the sleeve must not rotate about the through bolt they are pretty tight to swivel when assembled the sleeve is a neat fit in the bushes .and its not lubricated front or rears all are dry , used to be called self lubricating. only in as much as the nylon cant pyhically seize on the steel sleeve. Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 27, 2018 Report Share Posted February 27, 2018 On 2/26/2018 at 11:22 AM, PeteH said: The Bolt is tightened onto the Inner Sleeve, If it locks the Trunnion up solid, then I would suggest the machining of the Sleeve lengthwise is incorrect?. It's the ones that are screwed up so tightly that they flare the ends of the metal tube... some of the 'kits' don't show which tube goes with what, so you do get incorrect fittings from time to time. Not to mention the ones that are rusted solid after thirty-odd years of neglect. Link to comment Share on other sites More sharing options...
PeteH Posted February 27, 2018 Report Share Posted February 27, 2018 7 hours ago, Colin Lindsay said: It's the ones that are screwed up so tightly that they flare the ends of the metal tube... some of the 'kits' don't show which tube goes with what, so you do get incorrect fittings from time to time. Not to mention the ones that are rusted solid after thirty-odd years of neglect. Ah! Yes!. like the ones I had to get very "physical" with. Welded a stud to the bolt head in the end and used tube and washers to draw it out whilst "massaging" the threaded end with a lump hammer!. Link to comment Share on other sites More sharing options...
68vitesse Posted February 28, 2018 Report Share Posted February 28, 2018 Fitted polyurethane bushes to the rear trunnions of my Mk1 Vitesse as part of a job changing all possible bushes. In my opinion the crush tube was to long allowing the trunnion to rock, ended up reducing the length to the same as the tube for the spring eye bush. Used silicone grease on the bush and copper grease on the bolt. Regards Paul Link to comment Share on other sites More sharing options...
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