I had a dripping faucet, so thought to replace the O-ring in it. I removed the stem very easily. And changed the O-ring to one looking similar. I install the stem back and tried turning on the water.
The problem now is that faucet handles are so tight that I cannot turn them and I cannot even remove the stem now. Everything seems to stuck, no matter how much pressure I apply to remove the stem. I have attached a photo for reference.
Any idea what is the problem.