Land Rover Repair: Ranger Rover EAS, oring kits, reservoir tank

Question
Hi! I have a 1999 Range Rover, I just took it in to clear an EAS fault. The mechanic was unable to diagnosis it, but one  error message produced during the evaluation was a pump leak.

It has been taking an extremely long time to raise out of access mode in the mornings and throughout the day. However, once it has reached the normal ride height at some point during the day then when lowered to access mode it will raise quickly to full mode.

I am thinking that it might be a compressor problem - maybe it isn't pumping fast enough or a valve block leak, but really I have no clue! Also, if it is a valve block leak, are there other options besides replacing  the entire block?

Answer
This is most likely a combination of problems.  The most glaring is a worn out compressor.  Next is a slow leak that lowers your RR to the bumpstops overnight and drains the reservoir tank.  The block does not need to be replaced, it can be rebuilt, we sell oring kits and provide a rebuild service via mail-in of your parts.  The compressor can be rebuilt as well