XT600E motor rebuild!

[themoudie]

Brain picking time! 

Please could somebody tell me the "easy"    way to extract the 2 needle roller bearings in the left-hand crankcase that support the clutch accentuating cam shaft in the SRX and XT motors?

The upper bearing may drift out from below, if I am very carefull and have the case at 100°C. However, the bottom bearing is smaller in internal diameter, 15cm down a 10mm diameter blind drilling with no means of access from the bottom or side! 

I may end up flushing them through with a large aerosol can of brake cleaner, if all else fails, but I would like to at least know that this is not a Harry Houdini job, as the grit in them is not filling me with joy, at present.

Images attached to this post and the following post as well.

Thank you for your advice in advance.

My regards, Bill

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[themoudie]

Image of wee pokey hole where it might be possible to insert a drift to partially remove the upper needle roller bearing supporting the clutch accentuating cam shaft on SRX and XT motors. See first post for details.

Thank you for looking.

My regards, Bill

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[mthee]

Have you tried YouTube? I googled, "blind hole bearing removal". However, as interesting as the videos were (anchor bolt, driving various materials through the bearing - candle wax, wet paper towels, bread) my technical ignorance means I have no idea whether they are suitable for your application. Good luck!

[iansoady]

Most of those methods are for bushes rather than needle rollers.

What about (very carefully) drilling through from the blind side to meet up with the cage then using drifts after getting it nice and hot?

You may in fact find that getting it to 150 degrees or so is enough for it to drop out when the casing is whacked on the bench.

Actually, looking at it again, my first suggestion probably won't work.

[JOOLZ]

Have you tried simply putting it in the oven around 120c for 20 minutes (100 degrees isnt hot enough) take the case out turn it upside down and giving the case a little tap near the bearing with a soft mallet or block of wood, it should fall out

[Steve Lake]

Now then Bill.... are you interested in removing them in one piece?... in a reusable state... if so, then I can only agree with the 120c heat method, if however you are not worried about the state of them once they are removed... then I can think of quite a few methods