I'm rebuilding my compressor (dresser 600 series) because it spun the bearing on the low side piston and seized up.
The high pressure side went back together just fine, but the low side was hard to turn once it was torqued down.
I pulled the low side piston back off and verified that the high side piston still moved freely in both spots on the crankshaft, so that tells me the crankshaft is not the problem.
On closer examination of the low side piston bearing, I noticed that it seems too big.
On the right side in the image above you can see that the bearing sticks up above the rod surface just a bit.
Close up of the left side for reference.
I'm guessing that when it's all torqued down, that bearing is being deformed a bit and that is probably what cause my issue in the first place.
My question is, how do I fix it? Is there something I can do to the bearing, or is the connecting rod garbage?
The high pressure side went back together just fine, but the low side was hard to turn once it was torqued down.
I pulled the low side piston back off and verified that the high side piston still moved freely in both spots on the crankshaft, so that tells me the crankshaft is not the problem.
On closer examination of the low side piston bearing, I noticed that it seems too big.
On the right side in the image above you can see that the bearing sticks up above the rod surface just a bit.
Close up of the left side for reference.
I'm guessing that when it's all torqued down, that bearing is being deformed a bit and that is probably what cause my issue in the first place.
My question is, how do I fix it? Is there something I can do to the bearing, or is the connecting rod garbage?
