Tom Posted April 1, 2020 Report Share Posted April 1, 2020 Hello, I need to press new rear bushes into my diff casing, it looks like they will be an incredibly tight fit! I have a press at work nut we have all been sent home for the forseeable, I was contem using treaded bar to pull the bush in but if anyone has any suggestions that would be great, I presume heating the flange and popping the bush in freezer might also help? Tom. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 1, 2020 Report Share Posted April 1, 2020 Make sure when removing the old ones that you get the metal sleeve out too; often members just remove the rubber inner and the sleeve stays where it is, thereby making fitting the replacements almost impossible. If you lubricate it well it will slide in under reasonable pressure, it shouldn't take tons of force. Have you removed the casing from the diff? Makes things a lot easier! Link to comment Share on other sites More sharing options...
Tom Posted April 1, 2020 Author Report Share Posted April 1, 2020 Yes the diff is out the casing, tried with a hydralic puller and threaded bar but the slope on the back face of the flange keeps pushing the bush over, out of square. I'll make a wedge to square up the back face. Link to comment Share on other sites More sharing options...
Nigel Clark Posted April 1, 2020 Report Share Posted April 1, 2020 I had to hacksaw and chisel the old ones out, taking care not to damage the casing. As Colin says, the new ones should goes in fairly easily. Nigel Link to comment Share on other sites More sharing options...
Tom Posted April 1, 2020 Author Report Share Posted April 1, 2020 All the old bushing is out but there is no way it will push in easily, maybe I have iffy bushes? I bought them about 3 years ago from trgb I think, I'll file a lead onto the front edge see if that helps. Got them in the freezer at the moment see it that helps? Link to comment Share on other sites More sharing options...
Nigel Clark Posted April 1, 2020 Report Share Posted April 1, 2020 I lubricated the new bushes with Vaseline then used a wooden block and hammer to knock them into place. Nigel Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 1, 2020 Report Share Posted April 1, 2020 43 minutes ago, Tom said: All the old bushing is out but there is no way it will push in easily, maybe I have iffy bushes? I bought them about 3 years ago from trgb I think, I'll file a lead onto the front edge see if that helps. Got them in the freezer at the moment see it that helps? Chamfering the edge will help. I pressed my last ones in with a bench vice; just keep them square on. If you're using a threaded to pull them in, is it long enough to go right through both mountings? That way gives better access to the nuts and helps you pull the bushes in from a better angle, rather than a short length that just goes through one. Link to comment Share on other sites More sharing options...
Mathew Posted April 1, 2020 Report Share Posted April 1, 2020 Threaded bar with nuts and washers when I did mine. Link to comment Share on other sites More sharing options...
Tom Posted April 1, 2020 Author Report Share Posted April 1, 2020 The're in....but it was bery difficult. I measured the difference between the hole and the bush with a micrometer, the bush was 0.38mm bigger. I know that doesn't sound much but that is a hell of an interferance fit!! I stuck the bushes in my old black and decker power drill which has a handy frame that alows it to be mounted to a bench and using a file and some emery cloth got it down to 0.05mm over, they then pressed in nice and tight with threaded bar and then once that got too tight a high quality hydraulic puller!! Fitted all new seals and a gasket and hey presto I now have a diff!!! I intended to be welding today but my angle grinder blew up after about 1 minute of use this morning so at least I have achieved something! Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 1, 2020 Report Share Posted April 1, 2020 31 minutes ago, Tom said: I intended to be welding today but my angle grinder blew up after about 1 minute of use this morning so at least I have achieved something! Never tried welding with an angle grinder, you learn something new as they say. (That should give you some idea of the standard of this forum....) Glad the bushes are in, another job out of the way! Link to comment Share on other sites More sharing options...
Tom Posted April 2, 2020 Author Report Share Posted April 2, 2020 Just had a thought, when I assembled the diff, should the flanges on the output shafts have had sealant on them such as Welseal? I don't remember removing a gasket, and one doesn't seem to be listed, but maybe it should be sealed? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 2, 2020 Report Share Posted April 2, 2020 Never sealed mine, just screwed them up tight. Link to comment Share on other sites More sharing options...
NonMember Posted April 2, 2020 Report Share Posted April 2, 2020 I don't think they're supposed to have gaskets or sealant but I've known some people to say they should because of leaks. Link to comment Share on other sites More sharing options...
trigolf Posted April 2, 2020 Report Share Posted April 2, 2020 1 hour ago, Tom said: Just had a thought, when I assembled the diff, should the flanges on the output shafts have had sealant on them such as Welseal? I don't remember removing a gasket, and one doesn't seem to be listed, but maybe it should be sealed? Correct - they don't have a gasket fitted. I use a thin smear of Blue Hylomar to avoid leaks. Gav Link to comment Share on other sites More sharing options...
Tom Posted April 2, 2020 Author Report Share Posted April 2, 2020 Cheers Gav, that job 1 in the morning! Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 3, 2020 Report Share Posted April 3, 2020 its a good place for loctite 574 no gaskets are specified nor is any sealer , but why is the mystery its not a force fit there is no oil sealing apart from a flat face. / wing and a prayer so yes agree seal it up pete Link to comment Share on other sites More sharing options...
Mathew Posted April 3, 2020 Report Share Posted April 3, 2020 Just put mine together, with a bit of stag seal. Link to comment Share on other sites More sharing options...
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