removing the clutch MS261

[Dilz]

First time doing a bit of a fix on a MS261.

 

Needle bearing disintergrated on it.

 

Wanted to remove the clutch to look for any debris and to just to check it out due to some other reported issues with the saw, but couldn't get the clutch off so the saw was handed to me.

 

Can not for the life of me get the clutch off. Two issues - one is before i had a go it was attempted to be removed by being turned the wrong way using an impact wrench... Secondly I'm really struggling with the piston angle and jamming a piston stop in - it just keeps getting pushed out or even the usualy bit of old knotted thorwline trick.... perhaps i need to get one of the screw in stops...??

 

I took the clutch off an old 360 just to check i wasnt being too retarded and had no probelms... any tips much appreciated.

[Stubby]

As you have suggested the impact wrench going the wrong way is the problem . Normally I can get a clutch off with just compression and no piston stop . The only thing I can suggest is to use the screw in type of piston stop that fits in the spark plug hole . Screw it in and gently pull the saw over until the piston makes contact with it . Make sure its is hard up against the stop before you do anything . The inpact wrench might come in handy again but get it set the right way this time .

[spudulike]

Don't use the screw in stop as you are very likely to fracture the crown of your piston. Either hold the plastic stop in place or use a bit of rope but make sure the piston crown is above the exhaust port before stuffing it in.

 

The MS261 is one of the easier ones to shift. Try a longer tommy bar:thumbup:

[Sveriges]

As said do not use a screw in stop unless you want to fit a new piston! There really isn't much material there anymore. I normally use the impact in short bursts if there tight with pull chord and they eventually come off.

[bmp01]

Another vote for pull cord rope stuffed in the cylinder - i like the idea of distributing the load with something a bit flexible, much like what the running piston sees with combustion pressure. A solid piston stop is the direct opposite.

 

bmp01

[Haironyourchest]

Some years ago I had a guy do a rebuild to my 254XP - he used a screw in piston stop and when I examined the piston head at a later date, I noticed a wee crescent shaped indentation. Its not huge, but still instantly noticeable. Do you think that my piston head had been compromised? Saw runs just great, but still....was a tad annoyed.