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Author Topic: The small bearing in the crankshaft  (Read 738 times)

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Offline Ted

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The small bearing in the crankshaft
« on: June 09, 2016, 12:36:55 PM »
Hi guys, a technical question: inside the back end of the 170v crankshaft, there is a small ball bearing, kept in place by a massive metal washer. How do you remove that washer, without actually destroying it and having to make a new one?  ;D

Offline Henry Magno

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Re: The small bearing in the crankshaft
« Reply #1 on: June 10, 2016, 11:32:02 AM »
You need some sort of expanding puller, like a miniature inside three jaw puller. A machine shop might loan you one.

Offline Charles Adamson

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Re: The small bearing in the crankshaft
« Reply #2 on: June 10, 2016, 10:26:17 PM »
Here is a picture.

Offline Ted

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Re: The small bearing in the crankshaft
« Reply #3 on: June 11, 2016, 11:11:09 AM »
Thank you very much!  :)

Offline ereyal

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Re: The small bearing in the crankshaft
« Reply #4 on: June 18, 2016, 05:31:49 AM »
yah
i remember that part very good.... that was a pian in the a** to extract.

a slide hammer will do the trick (i dont have one .... :-\)

Offline Ted

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Re: The small bearing in the crankshaft
« Reply #5 on: September 29, 2016, 02:03:25 AM »
That one came out very easy with a reverse hammer. But here is one trick: wet paper, grease or even bread pressed in side the hole, moves the bearing out.  :) While I am not sure whether that would work on the 170, with its quite tight bearing assembly, it's a cool trick!

https://www.youtube.com/watch?v=dfDV982g4XM

Offline Ted

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Re: The small bearing in the crankshaft
« Reply #6 on: September 29, 2016, 02:41:27 AM »
Well, I could not wait, but test it. On a 170 crankshaft, filled the hole with bread and hammered it. Slowly but steadily, the cap came out untouched and intact! That was my point. The bearing remained inside and the bread would not move it - it goes out like grease through the bearing and it seems the proper pressure can not be created. Or would require too long hammering. So there goes the reverse hammer and instantly it's all done. The mail point, removing the cap without damaging it, is fully achieved!  :)