Blind bearing removal TS250 Supa 5

Forums Technical Two Stroke: Hints and Tips Blind bearing removal TS250 Supa 5

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    • #12658
      Gordon Harkness
      Participant

      Afternoon all,

      I’ve now stripped my TS down to (almost) the bare crankcases in prep for a renewal of all the bearings, seals, crank + special treat of a Vape 12v system.

      Any tips/hints out there for removal of the blind rolling bearing on the gearbox (lay?) shaft? The one on the right hand casing.

      Almost at the point of removing the bearings and starting the re-build.

      Any other tips on pressing the bearings in (heat cases/chill bearings etc) and fitting the mains and oils seals, re-assembling and fitting the gear cluster would be much appreciated.

      I will also open a thread on the rebuild separately. Again, any advice on whether you can copy paste from Word/PDF/Pages directly in to this site would be useful as I’m editing in Pages (words plus pictures of re-build to get the layout) and want to avoid having to link each set of words and pics to the post one by one.

      Cheers in advance.

      Gordon

    • #12667
      Andy Pratt
      Participant

      Hello Gorden,
      I use a modified rawbolt(projected type)place rawbolt in bearing,Run nut down thread and tighten up ,rawbolt eaxpands and grips inside bearing,at the top of thread I have welded a a washer to get my slide hammer hook in it,warm around bearing with blow torch and tap tap with slide hammer to remove bearing,does sometimes take a couple of attempts and more heat,Cheers Andy,

    • #12668
      Brian
      Participant

      Gordon

      Bearing pullers are available on eBay from £20 upwards. They aren’t just for blind bearings you can use them on,say, wheel bearings and it saves having to drift them out with a hammer.

      Here’s a cheap one. There are many others just put “bearing puller” into the search box.

      https://www.ebay.co.uk/itm/5-PC-Inner-Pilot-Bearing-Puller-Tool-Set-Kit-Remover-Blind-Internal-Slide-Hammer/391806230854?epid=26031190516&hash=item5b3978a146:g:SvQAAOSwofxUgdEy

      Brian

      • This reply was modified 1 year, 4 months ago by Brian.
    • #12670
      Peter Fielding
      Participant

      Hi Gordon,

      I find they come out easily enough if you heat the case to about 100c then bang it sharply on a surface (bearing facing downwards) Use a piece of wood to protect the mating faces. Sometimes it needs a couple of bangs or a bit more heat to get it moving.

      PeterF

    • #12673
      Gordon Harkness
      Participant

      Thanks Andy, Brian and Peter.

      Heating the casing and whacking it with a rubber mallet from the opposite side has done the trick.

      Will start the re-assembly tomorrow.

      Cheers

      Gordon

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