mustang HB bleeder screw

[OX1]

Should that be bled while the PS pump is running and/or while depressing the brake pedal OR should it not even be bothered with at all. So far nothing has come out of it (even left it open for a bit and have depressed brake pedal several times)

 

[bronko69er]

I had the same results as you, booster seem to work fine......

 

[TOFIC]

Hydro boost bleeder screw?? I don't believe there is such a thing
Send a pic will you?? I have seen dozens of H boost units and not seen a bleeder screw.
TOFIC

 

[bronko69er]

It's not the greatest pic but its the best I have.
It's got a rubber dust cap on it in the pic.

 

[72Sport]

Since it is easier to get the air out of the system before it is whipped to foam in the power steering fluid I would try to hook up some sort of vacuum to the bleeder screw and suck the air out. You might try a brake bleeder if you have one or duct tape a small piece of vinyl tubing to the hose on your wet or dry vac and draw the air out until you get some PS fluid.

Ford probably put the bleeder screw in the 96-98 units because all the lines came out the bottom of the HB. Air would get trapped up near the accumulator and be next to impossible to get out. I didn't use it on mine because I reclocked the hydroboost.

 

[72Sport]

Hydro boost bleeder screw?? I don't believe there is such a thing
Send a pic will you?? I have seen dozens of H boost units and not seen a bleeder screw.
TOFIC

When you get your hydroboosts for free they don't come with a bleeder screw.;D I have only seen them on 96-98 Mustangs. They had problems getting everything to fit in the Mustang with the 4.6 so all the lines came out the bottom of the HB when it was mounted which made for a big air pocket above the lines.

 

[OX1]

Hydro boost bleeder screw?? I don't believe there is such a thing
Send a pic will you?? I have seen dozens of H boost units and not seen a bleeder screw.
TOFIC

See upper part of this pic. Also see my thread titled "FIRE!!" (I did finally get fluid out of that bleeder :-[)

 

[TOFIC]

WELL I stand corrected, but now I understand why.
I would not use it if I was using this unit. What I would do is a standard bleed sequence, get it working and then open the bleeder slightly to get rid of any air that is in there. and you should be fine. BTW, hydroboost must be bleed under pressure, it has nothing happening when the engine is off.