just changed clk roof pump

[gumbumper]

Hi, just changed the hyd` elec` roof pump on my clk 230k w208, everything but the initiation of the roof lift works fine, ie sync` of movements. Closes fine, but just doesn`t seem to want to lift the roof from the screen, motor runs, but times out, like theres not enough power. loses a bit of oil from the pipe manifold & have a few bubbles in the resevoir, could be drawing in air or got an air lock in the lift ram pipes. hydraulic drawings would be great but experience would be greater. Thanks Lee