Its time to change mine out in my 90 Sovereign. It looks easy enough. My issue is, is there away to release the pressure. I don't want to start loosening that Allen nut without releasing pressure some how. Getting it is easy because the cars are at the junk yard. Any help here would be greatly appreciated. I have the time now and would like to tackle it asap.

 

With the ignition switched off....just pump the brake pedal 20 or thirty times...this will discharge the pressure

 

i changed mine and only way i got the accumlator was to disconnect a break line right next to the accumlator that either led into it or from it. after that the pressure want away and come off and back on in just minutes.