I have a SS5L5 IR compressor, single stage 5 hp 60 gallon tank, it came from Northern Tool close to 5 years ago. Although I liked the price point I have been pretty let down on quality.
1. shortly after it was new the pulley fell off the motor as it wasn't tight.
2. It's ate 3-4 belts so far.
3. Pressure switch contacts melted together so every other time it comes on it sticks on.
4. Head gasket blew between cylinders.
The last two issues I am waiting on parts for, I am in southern PA and they are sending parts from charlotte, they told me 7 days atleast to get parts, that is a crock, no reason for that at all.
After I got mine one of my friends got a 3 hp version and another friend got the 5hp like mine, I'm the only one with issues but I'm the only one using it in a repair shop.