Forum Discussion

mildani's avatar
mildani
Explorer
Jan 01, 2017

Hydroboost and break power steering problem

Hi i have a 1992 ambassador P30 454 chevrolet engine i buy this RV whit no steering and no breaks the st pump leaks so i got a new one i installed the new pump and bleed the system and bleed the breaks to several times no leaks on the breaks lines or wheels cylinders well the problem still no breaks or steering i got it to give a little steering but it will get hard again i need this bad i need to move the RV and i have not work on hydroboost before I think that is the booster that is not working and the master cylinder to but i am looking for advice or somme idea were to go from here the rv is ben setting for several years i will appreciate any help
Class A
  • darsben1's avatar
    darsben1
    Explorer
    Jan 01, 2017
    http://www.brakeandfrontend.com/operation-diagnosis-and-repair-of-hydro-boost-power-assist-systems/
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Jan 01, 2017
    Since both the Brakes and the steering use the same pump. when the engine is running, clearly that is the common item.. Oh, and a few hoses. Sometimes hoses do strange things.. Like turn into check valves.

    If you have "Spitter" things on the bottom Underneath that ism, of your compartments.. That's the kind of check valve a hose can become. Rare, but happens happened to me on a car.
  • mildani's avatar
    mildani
    Explorer
    Jan 01, 2017
    Hi I think is possible that the hydroboost is gone and the master cylinder wen i replace the power steering pump i was hoping for the best after i buy it i find out that the RV has been siting for several years not moving so the engine is great start real easy but the power steering and very possible master cylinder seals are gone i think that it has a splitter mi be stuck or dirty They put this tings on a real bad spot you have to take the left wheel and is a small window on a pc a metal to reach from the side or from the bottom
  • garry1p's avatar
    garry1p
    Explorer
    Jan 01, 2017
    When replacing the power steering pump you can bleed the system by turning the steering wheel (engine running) "all" the way to the left then back and all the way to the right.
    Do this a couple of times.

    When the brake hose to the wheel cylinders go bad the brakes do not release after you apply the brakes causing that wheel to lock up.

    RV brakes require a lot more foot pressure than an automobile are you sure you have NO brakes?

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