Place your 3/8" wrench on any of the four top cap nuts on the compression head currently on the bike.

Turn the wrench counter clock wise to loosen the cap nut and remove it. Then remove the washer and the locking washer. Repeat this for all cap nuts.

Keep the washers and lock washers with the cap nut they were with on the compression head, it is not recommended to mix them up.

Use the flat head screw driver to remove washers stuck to the compression head.

Sometimes the bolt gets stuck on the nut and comes out, do not worry, this is normal.