Getting port actuators working proper once cleaned up and re sealed I am very surprised how smooth they work with good shafts and seals .. In stead of buying new seals for the actuator shafts I used a wick seal product that I use when I rebuild large irrigation pumps It is just a heat resistant wick with graphite in it for lubrication , I just pack it into the seal cavity around and around until it is full with the shaft installed .. once the packing is all tight and in place the shaft can be removed and the clips and screw caps put in place and reinstalled .. If it is packed in tight around the shaft no it will not leak air