Loud humming noise, hydroboost?

Mike_42

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Hey all,

My moms 7.3 PSD excursion has around 310k on it. It just recently started making s very loud humming noise when moving the steering wheel or pushing the brakes. It is definitely harder to steer and takes longer to brake.

Is this hydroboost going out?


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hoodshauler

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Have you checked to make sure it's not low on fluid?


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Mike_42

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Yes, the power steering and brake fluid look ok


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Mike_42

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Clb

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Old pump, booster or the residual valve spring weak???
 

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