Craftsman 1.6hp 33gal burning rubber belt
The compressor works fine up to 90psi. Its an oil less electric compressor.
At 90 psi, with the cover off, I noticed the piston was slowing down and eventually stops.
The engine keeps running. The belt is trying to push a stopped piston and this is the reason why the belt is burning.
Its trying to force the piston but at 90 psi it does not want to move. I just replaced the check valve. This did not help. What do you think is wrong.
Lonnie, if this were my compressor I would be looking at the valves, and in particular, the high pressure valve to the tank.
It sounds like the tank pressure is back loading the line to the valve, and since the valve may not be working right, the piston cannot easily drive air past it into that line, and it stalls the piston, but the motor doesn't slow.
Might also be the pump itself causing the problem, but I'd be checking the valves first.