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Derbi gearbox bearing replacement.
Geplaatst: za 09 jan 2021, 22:44
door Derbir100
Hi guys. Sorry to use English. I'm just rebuilding my block and I'm wanting to change out the gearbox bearings. What tool do I need to pull the small roller bearing out of the case?
Many thanks and happy riding
Re: Derbi gearbox bearing replacement.
Geplaatst: za 09 jan 2021, 23:46
door 42
You mean the one you cant get out from the other side ?
There are special tools for that or you can use bread.
Or i was told anyway, didnt try it yet.
You put some bread in the roller bearing and some metal part which fits in the bearing like a cap or something and than you tap with a hammer on it, more bread, repeat and repeat and it should come out.
Re: Derbi gearbox bearing replacement.
Geplaatst: zo 10 jan 2021, 10:32
door bart_rs2
Bread wont work with the rollerbearing. I got out by welding a nut in it, heating the aluminium up and extracting it with a bolt.
Re: Derbi gearbox bearing replacement.
Geplaatst: zo 10 jan 2021, 12:39
door Derbir100
Yes that's the bearing I mean. I may just have to leave it
Re: Derbi gearbox bearing replacement.
Geplaatst: zo 10 jan 2021, 23:46
door Brommert_01
I haven't changed that one myself, but cant you Heat the bearing up, jam a large Bolt in there, let IT cool off to shrink the bearing, Heat the engine casing and try to pul the bearing out with the Bolt?
Re: Derbi gearbox bearing replacement.
Geplaatst: di 12 jan 2021, 16:42
door MennoVE
Derbir100 schreef:Hi guys. Sorry to use English. I'm just rebuilding my block and I'm wanting to change out the gearbox bearings. What tool do I need to pull the small roller bearing out of the case?
Many thanks and happy riding
I think you mean a bearing you can't hammer out? if so i think the tool is called a ''blind bearing puller'' i don't know if you meant that.
Re: Derbi gearbox bearing replacement.
Geplaatst: wo 13 jan 2021, 19:21
door Brommert_01
jeah,
this:
https://www.wish.com/product/5d36e141c1 ... &share=web
to be honest, its worth the try for just €35, i dont think you'll need it more then 1 time, atleast i cant imagine another use for myself for it. any professional set is triple the price
so for a cheap china set its in my opinion worth a shot.
Re: Derbi gearbox bearing replacement.
Geplaatst: wo 13 jan 2021, 19:51
door MennoVE
Yep that's it, you never konw what you might use it for but a cheap set will work for this.