Nick Jones Posted July 23, 2020 Report Share Posted July 23, 2020 8 hours ago, griffipaul said: Resurrected thread cos about to put longer m12 rear studs in roto rear hub and anticipating having to remove rear hub as I will not drill hole thro backplate Why not? Very much easier than pulling the hub and allows easy swapping in the future. Hole only needs to be big enough to pass the head of the stud and doesn't weaken the backplate. You can fit a grommet if you wish but mine have been open for at least 15 years with no ill effects. You won't get the LR M12 studs in without one or the other. Nick 2 Link to comment Share on other sites More sharing options...
griffipaul Posted July 24, 2020 Report Share Posted July 24, 2020 Pete Lewis now look what you've made me do. Did the hub come off by hand......nope Have I got a puller ......nope. Can I improvise ...yep Did I get it off yep. Did it come off on its own .....nope ....It came off with brg and oil seal. Will worry about putting it back together later Oh yes and found another cracked Cosmic alloy....one good one at the moment just one to go. 1 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted July 24, 2020 Report Share Posted July 24, 2020 Never realised that Triumph had also designed UFOs... Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 24, 2020 Report Share Posted July 24, 2020 well it made you have a go !!!!!! on refit stick some thin ply packing slotted in the gap to press the seal back in as the hub goes on pete Link to comment Share on other sites More sharing options...
griffipaul Posted July 24, 2020 Report Share Posted July 24, 2020 It sure did , always wary first time working on iners of rotoflex hubs , think I understand them now. Replaced roto couplings a few years back when I refurbed the rear end ,was not as bad as I thought , used Nigel Clark out of a mag method. As always good advice helps first time around. P. Link to comment Share on other sites More sharing options...
griffipaul Posted July 28, 2020 Report Share Posted July 28, 2020 So one side went fine , all back together with new studs. But the otherside is fighting back. Hub is stubborn , wont budge even with 3 leg puller, all that is happening is its pushing the outer drive shaft back in distorting the roto, worried in case do more damage. Any suggestions ? Last resort is to pull off vert link assy with shafts , push shaft through and attack hub from the rear , Link to comment Share on other sites More sharing options...
griffipaul Posted July 28, 2020 Report Share Posted July 28, 2020 Tried wedging bar between inner ond outer spiders which is what I must have subconciously done on the otherside and discovered that the f.....ing roto has sheared. So it Is off with the lot. Just goes to show that a little knowledge is a dangerous thing. Only replaced them 2 years ago . Boll.....s Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 29, 2020 Report Share Posted July 29, 2020 who said its easy ha !!!!!!!!! its a classic Pete Link to comment Share on other sites More sharing options...
griffipaul Posted August 6, 2020 Report Share Posted August 6, 2020 It sure did , always wary first time doing a job like this Link to comment Share on other sites More sharing options...
griffipaul Posted August 6, 2020 Report Share Posted August 6, 2020 All off and stripped down, some observations. Considering spline had moved freely on hub sufficient to push roto back only a few days previously it still took some effort on the puller to pull hub and vertcal link assy off the shaft , hub came out of link ok with a drift from the inner side . Rotoflex had sheared at the core and debonded at the trasverse metal plate. Interestingly I bought the couplings a couple of years or so back when the club were pushing Firstline as the new supplier , but looking at them now they are marked as G M which are the same as the new one I bought from Fitchetts, which are alledgedly not good quality. Club have not advertised rotflexes from anybody for a while. So are Firstline G M in disguise or were they old stock. Shaft has .148 spacer worn by about a thou and no shims. Hub slides on splines ok til engages with shaft dia then its tight , how much load should it take to push all the way home. Not forcing it at this stage Nothing obvious visually . Want to make sure everything it right before swopping studs and checking bearing float cos that will involve buulding and stripping a few times. Relevant photos attached Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 6, 2020 Report Share Posted August 6, 2020 +who started you on all this >>????? think of the labour cost youre saving .... Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted August 6, 2020 Report Share Posted August 6, 2020 2 hours ago, Pete Lewis said: +who started you on all this >>????? think of the labour cost youre saving .... Pete However, that quilt cover's gonna need replacing... Link to comment Share on other sites More sharing options...
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