DaveLindsay
ArboristSite Member
Well half a day at the Stihl shop and they were still (yes it was tempting) at a loss for why the chain brake wasn't working.
The chain would either run and trigger the chain brake, but not stop the chain or the chain wouldn't run at all regardless of the chain brake being activated or not.
So I took it home and spent a lovely rainy day afternoon pulling my dust cover and chainbrake apart and putting it back together over and over again! And this is what I have come up with.
The new "sagenzi" after market dust cover has slightly different (smaller) dimensions than the original Stihl dust cover. Without the brakeband installed the chainsaw works no problem (the guys at my Stihl shop did an amazing job of giving it a birthday not to mention the hours of trying to figure out the issue before I rocked up and didn't charge me for any of the labor)
With the brake band installed the chain will not go around regardless of how many revs you give it. I'm guessing the die grinder will be coming out in the morning.
You can see that the band is not able to sit in the correct grove. It's just not deep enough to fit both sections of band in.
I applied permanent marker to the band to determine where the clutch was rubbing (when the chain brake was off) you can see on the bottom section of the band that the marker has almost been cleaned off. The very bottom section marked in dense black was to make sure the clutch was not rubbing on the housing(dust cover).
Well hopefully with a little assistance with a die grinder I will have my chainsaw chain brake up and working again tomorrow afternoon.
Regards DL
The chain would either run and trigger the chain brake, but not stop the chain or the chain wouldn't run at all regardless of the chain brake being activated or not.
So I took it home and spent a lovely rainy day afternoon pulling my dust cover and chainbrake apart and putting it back together over and over again! And this is what I have come up with.
The new "sagenzi" after market dust cover has slightly different (smaller) dimensions than the original Stihl dust cover. Without the brakeband installed the chainsaw works no problem (the guys at my Stihl shop did an amazing job of giving it a birthday not to mention the hours of trying to figure out the issue before I rocked up and didn't charge me for any of the labor)
With the brake band installed the chain will not go around regardless of how many revs you give it. I'm guessing the die grinder will be coming out in the morning.
You can see that the band is not able to sit in the correct grove. It's just not deep enough to fit both sections of band in.
I applied permanent marker to the band to determine where the clutch was rubbing (when the chain brake was off) you can see on the bottom section of the band that the marker has almost been cleaned off. The very bottom section marked in dense black was to make sure the clutch was not rubbing on the housing(dust cover).
Well hopefully with a little assistance with a die grinder I will have my chainsaw chain brake up and working again tomorrow afternoon.
Regards DL
