Hydroboost Question - Maybe the Tee

[Iceman0502]

I almost have my wagoneer back on the road and have a little dilemma with the Hydroost and power steering. The truck only gets started once or twice ever week or two right now ( no need to start it more in the garage, just keeping everything moving and lubricated.

Each time i go to start the truck there is no power assisted steering. Jack up the front axle and turn the wheel 10 ish times and it comes right back.

Installed was a hydroboost unit from a 95 astro. The return line tee is set up correctly ( i have definitely looked into this many times) the hydroboost returns into the tee at the 90 degree and the steering box returns straight through. The PS cooler is right after the steering box before the tee.

The steering pump and box are a little old and the pump does make some noise (it will soon be replaced).



My biggest question is why does the power assist disappear after sitting for a week or longer. Is getting back pressure and its necessary to have a hydroboost return line go directly into the pump reservoir.
I have noticed that the resovoir may be a little over filled because some fluid pushes out of the cap occasionally. Maybe an air pocket.


Im slightly confused and would like to figure this out before putting it back on the road.

Thanks

[carnuck]

Pressure regulator is bleeding down after sitting. If you pump the brake with the wheel turned slightly it should catch up. Common in older Chevs too.

[Iceman0502]

Well that makes sense.

I am being a little slow right now, but is the regulator in the hydroboost its self? How do i go about fixing this or do i just get a new hydroboost?

[carnuck]

I just rocked the wheel and pumped the pedal till PS kicked in. Just make sure it isn't a loose belt. My line has a Y instead of a Tee.