help gurus hydroboost issues!!!

[la77]

got it all painted, installed, hoses bent and connected. looks sweet. couple of problems. when I start er up the pedal goes halfway down, it is constantly appling the brakes some. when I turn the wheel the brake pedal goes down more and harder to turn than before. I have an Astro hydroboost, vett master cylinder, and a napa heavy duty ford steering pump which I think is a saginaw made to work on ford.

could I have my lines crossed? The hydroboost port with the 18mm fitting is going to my pump and 16mm port going to my stock bronco steering box. I did take it apart but it is too simple inside to put together wrong, or maybe not. Also my return lines are T'd but I have seen others do this and it works fine.

any advice would be appreciated.

 

[SaddleUp]

got it all painted, installed, hoses bent and connected. looks sweet. couple of problems. when I start er up the pedal goes halfway down, it is constantly appling the brakes some. when I turn the wheel the brake pedal goes down more and harder to turn than before. I have an Astro hydroboost, vett master cylinder, and a napa heavy duty ford steering pump which I think is a saginaw made to work on ford.

could I have my lines crossed? The hydroboost port with the 18mm fitting is going to my pump and 16mm port going to my stock bronco steering box. I did take it apart but it is too simple inside to put together wrong, or maybe not. Also my return lines are T'd but I have seen others do this and it works fine.

any advice would be appreciated.

Is your T as close to the pump as possible? This sounds like back pressure in the return line. Be sure that T is as close to the pump as possible. If it isn't then it can cause the back pressure.

 

[la77]

My T wasn't very close to the pump. I also figure out that I left the dump valve out. left over parts is BAD. back apart we go this sucks I want to drive.
thanks saddleup

 

[TOFIC]

Some things to check and some things to do.

Check that all the lines are not leaking, remember, a saggy pump will do weird things if the system is leaking fluid.
Rebleed the system, one of your symptoms in showing air in the system.
(turning the wheel and the level drops,, should not happen.)
Check your actuating rod under the dash, it should have about 25 thou of slack in it. If it is snug it will activate the brakes.
Check the Tee close to pump I hope.
Get rid of the tee. Lots of guys have put in another return by soldering in a return fitting into the can. Just make sure the return is in the fluid not above fluid level. Rule of thumb is right behind the impeller assembly. The fittings are cheaper than the brass Tees.
Do not use Plastic tees!! Ask me how I know they will melt and leak in time.
TOFIC
Write if you have questions.

 

[Bronchole]

Do not use Plastic tees!! Ask me how I know they will melt and leak in time.

LMAO!!


If you insist on running a "T" then make sure that the Hydroboost return runs straight thru the top of the "T" so the fluid does not have to make the 90° turn, IT MAKES A DIFFERENCE. Since the Hydroboost is so sensitive to the backpreassure you must do all you can to reduce the backpreassure.

Let us know.

Dan

 

[la77]

fixed it!!!

when I put it back together the first time I din't realize the little dump valve thing had popped out. It sits under the plunger with the sombrerro looking thing. took it all apart this morning put it back in and reassembled everything.
works great now no problems. having good brakes is going to take some getting used to. If I had known brakes would be that good I would have done it along time ago.

thanks for the advice guys, appreciate it.

 

[TIGERNUTZ]

Glad they're working! You missed a great ride Saturday, except for the 3 flats %) ! Now that you figured that all out, get over here and let's do mine ;D !