This is indeed a very useful document - thank you for sharing it! Quite well written, compared to similar documents for some other brands.

Just to clarify: this document only refers to the port seals being replaceable on the cylinders. Port seals are the ones sealing the hydraulic lines to the cylinders. The port seal is not what is leaking, but it needs to be replaced after taking a hydraulic line out of a cylinder. The document is indeed showing on page 4070 how to install port seals after a hydraulic line has been removed. Top Hydraulics always ships the rebuilt cylinders back with three port seals in a bag, attached to the cylinder so that they don't get lost. Two seals are to be put on the two hydraulic lines, and the third one is a spare in case you loose one. We include an illustration for port seal installation. The trick is, the port seals need to be pushed on the hydraulic line fittings before you push the fittings into the cylinder. When and if the fittings get pulled out again, the port seals will remain in the cylinder port.

The reservoir is attached to the pump, which is in the trunk's left rear corner. The system is self bleeding. After some five cycles, all air from the cylinder will be transferred into the reservoir. Obviously, you need to keep the fluid level in the pump high enough so that the pump does not suck air while you are activating the system again, and you want to correct the fluid level again after the top has cycled out the air. The document summarizes filling the reservoir as follows on page 4078: "Remove the reservoir plug and fill to appropriate level with the recommended fluid. Reinstall the reservoir plug. Torque to 2 Nm."

Klaus