Stuck Sprockets on Stored Saws...

[Woodsnake]

Hello,

I have a Husky 336, and a 555, both excellent saws, and the sprockets on the bars are both stuck. I sprayed some PB Blaster and let them sit for a day and no luck. Maybe I need to soak them for a while in something? My family and I moved to the Olympic Peninsula from Wisconsin 3 years ago, and in Wisco we generally cut about 18 cords of wood a year, and my saws were in regular use. When we moved we've been building our own house so the saws have sat. They've been on a plastic shelf in a carport shelter all that time and now I pull them out, and anywhere where there is residue from canola oil (I use as bar oil) has turned black, and the sprockets are frozen. Any advice? Maybe heating them up? Soaking them in some kind of solvent?

Thanks.

 

[ballisticdoughnut]

The canola oil has polymerized and basically turned into plastic. I hate to think what the rest of the saw looks like. Good luck cleaning that up. I’ve tried many different cleaners, solvents, etc so far nothing has been effective at removing that stuff. Bit of heat is probably your best option at this point. That and start using actual bar oil.

 

[altatim]

It takes an alkaline based cleaner to remove polymerized oils which is not good for aluminum or magnesium for that matter. Best to stick with oils that don't turn change state lol. Best to soak in some sort of organic solvent or get out a toothbrush and start scubbing with hot water

 

[Mad Professor]

The canola oil has polymerized and basically turned into plastic. I hate to think what the rest of the saw looks like. Good luck cleaning that up. I’ve tried many different cleaners, solvents, etc so far nothing has been effective at removing that stuff. Bit of heat is probably your best option at this point. That and start using actual bar oil.

Yup, Stihl bio-oil does that too.

I had to pry the chain from the bar with a screwdriver to get it out of the rails. No solvents I tried would free the sprocket tip. I didn't try halogenaled stuff like TCE/DCM.

I took a piece of scrap wood and beat the sprocket teeth with a hammer, bar in a vice. Eventually I got the sprocket to move, then turn.

It takes an alkaline based cleaner to remove polymerized oils which is not good for aluminum or magnesium for that matter. Best to stick with oils that don't turn change state lol.

Yes, stay away from that stuff unless you clean it all up.

Best to soak in some sort of organic solvent or get out a toothbrush and start scubbing with hot water

I'm an Organic Chemist, I tried about every solvent except halogenated ones, no go.

Chain I never got to free up all the way.

I didn't try using lye/oven cleaner, that might work. A good idea. Will put the chain in some drain cleaner/lye solution. Maybe boil it too.....