HELP! Stihl 020av crank case separation.

[Stihlcutting]

I have had this Stihl 020av sitting around for a few years and have the time to go through it. I discovered that there was a stripped-out case screw while doing the vac/pressure test. I have the case split. All screws and pins have been removed but am not sure what's the best way to separate the halves. I am wondering about using a heat gun around the bearings and a plastic hammer. Does anyone know of a safe method to separate the crankshaft from the case halves without any special Stihl tools? Any suggestions would be appreciated.

 

[Al Smith]

I would say your method should work . I have the proceedure I think on micro fiche that once the dealers used .I'll look at it later today to verify the method and if something needs done I'll mention it .

 

[Stihlcutting]

Ok. Thanks for your help. I will post my results.

 

[EFSM]

Put the flywheel nut back on and tap on the end of the crankshaft with a brass hammer while holding the flywheel side crankcase half.

 

[Stihlcutting]

The halves do twist to a point. I could use wooden blocks to support one half and try that method. I am leery of the bearings. I don't want to damage them. I will try it if the heat gun method doesn't work. Or along with the heat method. Thank you for the help.

 

[Al Smith]

According to the directions from Stihl they recomend knocking it apart with a rubber hammer .I don't think thumping it with a brass hammer would be a good idea .Could damage a bearing .

 

[Stihlcutting]

Ok. Thank you for that information. I am about to tackle this. I will try with a rubber hammer first. I will let you know how it goes.

 

[Stihlcutting]

The halves have been separated with no damage to anything. The heat gun made all the difference. I used the high setting, going around the outer edge of the bearing on the drive side for about a minute. Set a couple blocks under the half that I was trying to separate. With one rap of the rubber hammer the crankshaft and bearing popped out of the case. I was a little surprised at how easy it came apart. Thanks to everyone who gave me the helpful instruction.