The clutch actuator seal can only be done by removing the clutch cover. You have to pull the spindle out to remove the old seal then fit a new one and replace the spindle which is quite tricky but you will see how it works when you pull it out. You might as well get a new gasket for the clutch cover while you're at it as they usually fall apart if its quite old. The gear changer seal can be replaced anytime but it might be worth ordering one in case that fails on reassembly. One other thing to check is where the spindle comes into the clutch cover there is a bush that is pressed in and acts as a bearing for the spindle. Mine came loose once and I had to strip the cover off to sort it which I did with some bearing adhesive (not sure of the brand). I knew this as the actuator was wobbling all over the place. You might want to make sure that is firmly situated.
