I have a 2N that the lift drops rather quickly. I removed the side plate with the PTO shifter lever and looked inside while the lift was holding a bushhog and saw a fair amount of oil coming out of the ram cylinder. So, I need to replace the rings on my ram piston by removing the hydraulic lift cover. My concern is the high pressure tube that goes from the pump to the lift cover. Can one remove that before taking off the lift cover or do you need to carefully lift the cover with it intact and pull it out of the pump? I do not want to damage it. Any advice would be greatly appreciated.