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Post by snakeplissken on Feb 25, 2019 8:14:29 GMT -5
I am rebuilding my minarelli motor from the case up. The problem i'm having is even thou the crank and crank bearings went in smooth using the hot cold method I couldn't get the other bearingings in (clutch and gear) No matter how hot and cold they just don't go in. should i press them in or maybe sand the hole a little. How hot do you need to make the place the bearings go in. No more oven treatment since i put the crank in. Could the bearings be the wrong ones. I got the same numbers off the ones i took out of the old case. You know these chinese cases are never precise.
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Post by lilpinny on Feb 25, 2019 10:25:32 GMT -5
Take it to a machine shop and have them press it in.
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Post by oldgeek on Feb 25, 2019 16:28:24 GMT -5
Hot/ cold will usually get the job done. You can use a heat gun to heat the cases good and hot. if there is a hole through the cases, such as with the primary shaft you can make a puller from threaded rod, washers, nuts and sockets to pull the bearing in. Always use some oil on the bearing and case if pulling or pressing the bearing in. Also push or pull on the outer race of the bearing only, never the inner race. Good luck!
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Post by lilpinny on Feb 25, 2019 17:27:14 GMT -5
Here is a bushing pusher I rigged for my Ruck.  |
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Post by 90GTVert on Feb 25, 2019 17:28:04 GMT -5
Around 250F should be hot enough to get them in. Heat gun will get it there.
If in doubt about the sizes, get out the measuring tools. Don't go sanding stuff down.
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Post by snakeplissken on Feb 25, 2019 20:48:19 GMT -5
Can i replace the open bearing with a sealed one. 6203/P5 to 6203/2RSH.
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Post by oldgeek on Feb 25, 2019 22:09:45 GMT -5
Can i replace the open bearing with a sealed one. 6203/P5 to 6203/2RSH. I would not use a sealed bearing in the gearbox. You can usually pop the seals out of the bearing and you should be ok. |
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