Stihl 028 AV Super Rebuild Project
- Thread starter briantutt
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brandonstc6
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It looks like a needle from a bearing came loose or a piece of the wrist pin clips got into the cylinder. Look for anything that may have some loose inside.
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briantutt
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brandonstc6
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You will definitely need a new or used cylinder and piston
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briantutt
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briantutt
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yeah, I guess at this point I might as well split the case and give it a complete once over, who knows where all the metal fragments went.
Brian
brandonstc6
Addicted to ArboristSite
I have one good cylinder and piston except it needs a helicoil in the spark plug hole. If you are interested, let me know
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Same thing happened to me with an 066 two years ago. I replaced the piston, rings, and cylinder. The saw runs fine today.
Piston looks pretty new, besides the carnage.
Was it OEM or aftermarket? Never seen a OEM do that unless fubared installation.
Have seen similar damage from grenaded bottom/lower rod bearings.
Was it OEM or aftermarket? Never seen a OEM do that unless fubared installation.
Have seen similar damage from grenaded bottom/lower rod bearings.
briantutt
Addicted to ArboristSite
if I understand the history correctly my coworker's father bought it new for the hobby farm the lived on. they have since moved back into the city for the last 15 years it has just sat. I think it is very low hour based on the rest of the saw so either poor assembly or part defect is the root cause. I still feel like making it run though.
Brian
It can be done, I have done it twice for 028 Supers. These are good saws and worth rebuilding. Take your time and keep the faith.
making progress slowly
Brian
LegDeLimber
Addicted to ArboristSite
Every time I see a photo of the 028 super piston (46mm right?)
I get to wondering about trying to sneak one inside of my Echo pb-620 blower.
That pop-up is what I'm fixated on.
Seems that an aftermarket, Stihl piston, is about half of the price of the Echo one.
That's a bit more attractive to experiment with.
Would be really nice to get a bit more grunt from the Echo, in the upper 6k to mid 7k rpms!
I get to wondering about trying to sneak one inside of my Echo pb-620 blower.
That pop-up is what I'm fixated on.
Seems that an aftermarket, Stihl piston, is about half of the price of the Echo one.
That's a bit more attractive to experiment with.
Would be really nice to get a bit more grunt from the Echo, in the upper 6k to mid 7k rpms!
briantutt
Addicted to ArboristSite
yeah, I was surprised to see that when I opened it. Part of the reason I want to rebuild it is to some are to the 028 WB which I think is the 44mm and I don't know if it is pop up but none of the other saws I have had this far apart are like this. got the gasket yesterday, still waiting to come across a cylinder.
Brian
Matt_Ellerbee
ArboristSite Operative
Sub'd.
Ran my super a bit this evening. Just might keep it after all!
Ran my super a bit this evening. Just might keep it after all!
Now you know why I have three of them -- they all run and seldom have trouble unless I ignore them. Even then they tolerate me. The more I use them, the better they seem to run.
LegDeLimber
Addicted to ArboristSite
Is there any chance that you (or anyone else) could take and post some measurements of the 028 Super, piston?
Pin size and height from pin to dome. plus the width where the connecting rod fits, would be very interesting.
Pin size and height from pin to dome. plus the width where the connecting rod fits, would be very interesting.
