ADVNTURR
I worry when rattles stop
- Location
- Cleveland, OH
I am in the process of upgrading the single diaphragm booster in my 91 XJ up to a dual diaphragm booster out of a 95 I pulled from a junkyard (I am swapping in the whole booster/master cylinder/proportioning valve assembly), but I am having a rough time trying to get the system to build any pressure. I managed to get everything bolted up and made some adapter lines to get from the location of the old proportioning valve to the position of the new one. I then started trying to vacuum bleed the system and after pulling ~1-2 reservoirs worth of fluid through the system I still had no pedal pressure.
I regrouped and did some more research and realized that I probably should have bench bled the master cylinder. Last night I pulled the master cylinder off of the booster and proportioning valve and set it up in my vice with some clear lines running back up into the reservoir. When I pump the cylinder I am getting good flow from the first port (closest to the booster/firewall) but the second port is not doing anything. If I disconnect the fitting from the second port fluid just drains out.
I do not have any experience with this style master cylinder, but I am assuming that both ports should be moving fluid when the cylinder is pumped? Does this sound like a clogged port on the cylinder, or could it be that I just got hosed by a junkyard part and need to rebuild/replace the master cylinder?
Any thoughts would be greatly appreciated
I regrouped and did some more research and realized that I probably should have bench bled the master cylinder. Last night I pulled the master cylinder off of the booster and proportioning valve and set it up in my vice with some clear lines running back up into the reservoir. When I pump the cylinder I am getting good flow from the first port (closest to the booster/firewall) but the second port is not doing anything. If I disconnect the fitting from the second port fluid just drains out.
I do not have any experience with this style master cylinder, but I am assuming that both ports should be moving fluid when the cylinder is pumped? Does this sound like a clogged port on the cylinder, or could it be that I just got hosed by a junkyard part and need to rebuild/replace the master cylinder?
Any thoughts would be greatly appreciated