2. Turn the trimmer over with the cutting head pointing up. Place a small flat-head screwdriver through the holes in the plastic deflector and the thrust plate below it. This locks the shaft in position to remove the spool head.. Align the hole in the center of a PolyCut nylon blade and the screw in the center of the shaft. Place the blade on the shaft's screw. Insert the nut onto the screw and turn it clockwise until it nut is tight with an adjustable wrench.
The swelling is caused by too much fluid in the tissue, which is called edema.. Swollen feet, legs and ankles are a very common problem that usually doesn't require treatment. For example, gravity often pulls fluid down into the feet when you've been walking all day. This swelling usually goes away by the next day.
Sometimes swelling can indicate a problem such as heart, liver or kidney disease. Ankles that swell could be a sign of heart failure. Kidney disease can also cause foot and ankle swelling.