Undo the damper rod bolt on the bottom after removing the top cap,spring & oil, Remove the clip on top of the seal,If the forks have no replaceable bushes the inner usually will slide straight out & you can then gently prise out the seal with a tire lever etc, If they are bushed forks,put the lower leg in a vice with soft jaws via the axle clamp & slide hammer the inner & outer apart,the seal will come along with the inner,you may need to do the slide hammer action 3 or 4 times to get them apart