connecting rod bearing

[lucky]

Can the connecting rod bearing on stihl saws be replaced? It looks like you could press the crank apart and replace the bearing. However I cannot tell if the halves are indexed or arranged in some other fashion to keep this balanced. Can somebody shed some light on this? Thanks, Lucky

 

[NevadaWalrus]

I'm sure a good machine shop could handle it. Re-assembly would certainly require proper re-alignement. Machine shop charges and sourcing a replacement bearing would be the sticking points. Stihl doesn't make the bearings available except for some older models with un-caged bearings. I think the 009 is one of these.

 

[ehp]

yes they can be replaced and yes you have tomake sure your crank is straight when you are done but you are going tobe surprized on how much pressure it is going to take to get your crank apart
always remember everytime you take a crank apart in never fits as tight as i did from the factory

 

[lucky]

Thanks guys. Do you have to build a jig or something to keep the halves in line when pressed back together? If that's true then it's a whole lotta work. Is there any trick to this? Thanks, Lucky

 

[mboln52000]

Lucky,
I was trying to do the same thing with a bad 066 crank that i had. I have the press, worked on a few jigs, but never did get anything to work out. I found some used cranks and got up and running again.

The factory assembles the cranks heated, and they use a shrink fit on them, and true them on a jig before they are cool and tight.

True, it would take a lot of force to separater them, but trueing them up again will be really difficult. I have trued several old harley cranks on a jig before, and thats pretty easy because they are 5 pices, all with tapers.

If you do get them apart, and repair them, let me know, i would like to know how they turn out, and how you blanced them.

Good luck!

 

[ehp]

it is not hard to do , i have done lots of cranks
most times when you take it apart you ruin the pin bearing anyhow
before you take it apart just that a straight edge and scribe 2 lines on it across the counter weights backside so when you put it back together you can line them up , this will get you in the ballpark , now you need a dail indicator and a pair of V blocks
put your crank in the V blocks , makesure it turns freely , spin it over and check with your dail on the flywheel end and your cluth end for out of round , you will see which way it has to go quite easy and you hit it in the direction it needs to go,once straight i always tig the pin some to makesure it doesnot turn on me

 

[stihltech]

bearing

The question is, where do you get a new bearing?

 

[ehp]

from my crank place an also if you have pull the factory will send you new bearings and pins

 

[stihltech]

pull

I am going to work on the pull end since I will be a Virginia Beach every year now.

 

[ehp]

i guess i am lucky because the stihl guys that work at the head office also race and need help, i help them they get me stuff

 

[lucky]

Your pull sounds nice ehp. Those of use without pull will need to look elsewhere. Couold I use a bearing from a local bearing house or would it need to be the exact same as stihl? A bearing of different weight may throw off the balance. no? Lucky

 

[ehp]

if it was me Lucky , i would get a bearing from a crank place and if you have never do it and donot have the equipment to do the job , i would also have them do it for you but first check and see how much it is going to cost because you maybe cheaper to get a new crank
most bearings are not designed to go that many rpm's so i would use the proper one, nothing will ruin your day as good as the bearing letting go and the needles coming up into your jug

 

[lucky]

Thanks ehp. I'm pretty tight with a machine shop here that can can really do anything and 1st class too. The bearing house is just down the road. Thanks for the info ehp, it's really appreciated. I will check prices but it probably saved me a pile.
Thanks again, Lucky