[NSRCA-discussion] YS help

[Budd Engineering]

Hey Ron - You had it easy.

I had one where I had to cut the bearing off with a Dremel tool.  At  
first I thought I could split it with a single cut and then wedge a  
flat bladed screwdriver into the gap and twist it to open the bearing  
up and get it free fron the crankshaft.  Wrong!  I wound up having to  
cut both sides of the bearing free (180 degrees apart) before it  
finally came off.  Only took 2 hours!

For those who have to resort to this, be very careful cutting through  
the last bit of the bearing, it's really easy to cut into the  
crankshaft without realizing it (don't ask me how I know this!).

Jerry

Budd Engineering
jerry at buddengineering.com
http://www.buddengineering.com

On Jul 4, 2008, at 3:30 PM, Ron Van Putte wrote:

> I had this happen on an OS 1.40RX.  To say that it was difficult to  
> remove the bearing from the crankshaft is understating the problems  
> I had.  I ended up using wood chisels and flat blade screw drivers.   
> I inserted a wood chisel behind the bearing, with the flat part of  
> the chisel facing back. I supported the opposite side of the  
> crankshaft and lightly tapped the chisel.  Then I moved to the  
> opposite side and did the same thing.  Eventually the bearing  
> started to slide on the crankshaft.  In my case, it turned out that  
> the crankshaft was oversize and the bearing was seized on the shaft,  
> so it didn't just slide off.  When there was enough of a gap, I  
> turned the chisels around and used them as levers.  I progressively  
> "walked" the bearing off by putting flat screwdrivers between the  
> chisels and the crankshaft using the chisels as levers.  It took me  
> at least half an hour of careful work to get the bearing off.  I  
> chucked the crankshaft in my drill press and honed it to the right  
> size using emory cloth.  I'm still using that motor.
>
> Ron VP
>
> On Jul 4, 2008, at 4:39 PM, Bob Kane wrote:
>
>> Well, for all the YS engines I have rebuilt, I'm stuck with a  
>> situation I have not run into before. I dissassembled 160DZ to  
>> replace the main bearing. The 2nd to the last step in the  
>> dissassembly porcess is to remove the crank. A few light taps and  
>> it normally slides out. Well, this time the bearing stayed on the  
>> crank. Usually it stays in the crankcase. Normally I would heat the  
>> cranckcase to get the bearing to fall out, but how do you get a  
>> stuck bearing off the crank? The fully circular rear face of the  
>> crank shaft makes getting to the bearing difficult.  Suggestions?
>>
>> Bob Kane
>> getterflash at yahoo.com
>>
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