Nope. Easy to get to by just removing several bolts holding the arch liner and you can see it. The pump is a push-fit at the bottom of the reservoir - there is a simple washer sealing it and it perished on mine. The actual washer was the same size as a tap washer I already had in my 'plumbing box'.........
If the reserviour itself leaks (unlikely) some gum or Araldite may fix it?