sorry sir a stud seems to have gone up I can change your feet changing a keg is easy firstly check that the cellar boy has dropped and that the keg is empty turn off the air feed is shown this will stop the noise and turn off the gas feed to the keg remove the seal on the new keg squeeze and twist the lever to remove the tap and reverse this process to reattach it to the new keg turn the air and gas feeds back on open the valve at the top of the boy housing until the housing is completely full and then close it again fully so that beer is not wasted activate the plunger to release the boy ensuring that the plunger is pulled out on completion if needed use the top valve again to ensure the boys at the top of the housing