to the arm you can remove the whole lift from the arm.
Remove the lift from above. Then remove the black round
cover at the bottom of the lift. Then you can see how the
lift lever works. The lift lever need to be removed in order to
get the ''cylinder'' with oil out. Clean the under side of the
lift lever and then put the whole together. I am not sure but
think that the lift lever causes the lift to drop. To put it otherwise
one can see that the lift lever drops instead to move slowly
down.