Installing the Port
There are two port locks on the front of the housing. (See housing front) Each port lock has a Release Button, lift the release button and slide each Port Lock away from the port opening. In the unlocked position the Release Button will remain in the up position as shown.
To prepare the port for installation, remove the port o'ring and lightly lubricate it. The port seal is a side-to-side seal and requires the o'ring to be lightly lubricated for easy installation. Put a small amount of lubricant on your fingers and draw the o'ring through your fingers to lightly lubricate it. Do not stretch the o'ring. Check that the lip of the port where the o'ring fits and the sealing surface on the housing are clean. Place the port, with o'ring into the housing's port opening. Press down on the port firmly and evenly until you feel the port slide into place. Continue to push down on the port and push each port lock forward until it clicks into place. It may help to slightly rotate the port as you push in on the port lock. When the port lock clicks into place the Release Button will drop down against the port lock.
Check around the perimeter of the port seal to see that the o'ring is properly sealed and not extruded.