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.
Leg swelling caused by the retention of fluid in leg tissues is known as peripheral edema. It can be caused by a problem with the circulatory system, the lymphatic system or the kidneys. You may also experience swelling due to fluid buildup after sitting or standing for a long time. Factors related to fluid buildup include: 1  Acute kidney failure. 2  Cardiomyopathy (disease of heart tissue).