Ah Ha! Found it. It looks like all the seals/o-rings are on the plunger end and that there is no seal on the end cap where the adjusting bolt goes. In fact, based on that diagram, there should be no hydraulic fluid in the cavity with the spring. Do you concur? I'll try to figure out what the following seals or O-rings means:
porteurs 2.5 X 5
porteurs 62/20X2.5X5.6
CSC 20X26X5.5
EVCO RSE 74X65/4X8
What were the symptoms of your system that warranted your changing the spring?
