Re: 86 International Hydraulic Brakes
The system is called Hydro Max, if you're looking for info. Uses a 2" bore master cylinder. Similar to the Hydroboost on Chevy trucks, just much beefier. From my understanding the backup motor will run until pressure is built up. If there is a leak, it will run continually. For how long I don't know. Mine wasn't building pressure, and going through a lot of brake (break for the illiterate) fluid. Ah, yes, someone left the left rear brake nipple open. Once I snugged that, the boost motor stopped running. Parts are readily available, either the master cylinder or booster. Not cheap though.