Question about 2003 Ford F350 Super Duty DRW SuperCab

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Very hard to turn at idle or low (parking lot) speed. would it be the pump or hydro boost unit? or possably an air bubble?

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It should be the pump had the same problem and changed the pump. when you put the new one on fill it up with derxon 3 or 5 auto trans fluid leave cap off and turn wheel to left and right slowly until air is out of system then fill to hash mark on stick.

Posted on Aug 07, 2010

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Lumina troubleshooting


first check the condition and level of p/s fluid. if low top off first and turn your steering wheel left to right and back several times to try to bleed air out of p/s system. if p/s is still stiff or hard your p/s pump pressure output can be measured with a pressure gauge. if pressure is below specs its time to replace it. if your p/s output pressure is good then you would need to inspect your p/s hose or lines for kinks or restrictions to your steering rack. on certain model vehicles p/s sensitivity can be adjusted on the steering rack. you would need to check the vehicles service manual to see if its possible to adjust steering rack sensitivity.

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I changed my front pads and rooters on my 2002 suburban and now the power steering is out?


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Mar 30, 2014 | Chevrolet Suburban Cars & Trucks

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2001 chevy tahoe vacum hoeses for power steering


Hello! There are power steering fluid in/out hoses but no vacuum lines...It sounds as if the pump needs to be bled of air or the belt is loose...Belt should move about 1/2 to 3/4"...Bleeding is as follows...
Guru...saailer

    ImportantPower steering fluid level must be maintained throughout bleed procedure.
  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
  2. ImportantWith hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF. This will discharge the hydro-boost accumulator.
  3. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
  4. 2.1. Start the engine.2.2. Firmly apply the brake pedal 10-15 times.2.3. Turn the engine OFF.
  5. Raise the vehicle until the front wheels are off the ground. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Key on engine OFF, turn the steering wheel from stop to stop 12 times.
  7. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  8. Verify power steering fluid level per operating specification. Refer to Checking and Adding Power Steering Fluid .
  9. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  10. Verify the fluid level. Repeat the bleed procedure if necessary.

May 03, 2012 | 2001 Chevrolet Tahoe

1 Answer

My brakes and power-steering are not working. The brake pedal is hard, but the brakes will not engage. The power steering was not working at the same time. It has brake fluid, but when I took the power...


Yes, your brakes are boosted by the power steering pump rather than by vacuum. I don't think it's air in the system. More likely your pump has failed, but you can try bleeding the pump. Here is a procedure from autozone.com:

Observe the following:
Use clean, new power steering fluid type only Hoses touching the frame, body or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.


NOTE Power steering fluid level must be maintained throughout bleed procedure.

  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
    NOTE With hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF . This will discharge the hydro-boost accumulator.
  2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
    1. Start the engine.
    2. Firmly apply the brake pedal 10-15 times.
    3. Turn the engine OFF

  3. Raise the vehicle until the front wheels are off the ground.
  4. With key in the ON position and the engine OFF , turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  5. Verify power steering fluid level per operating specification.
  6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  7. Verify the fluid level. Repeat the bleed procedure if necessary.

Observe the following:



Use clean, new power steering fluid type only Hoses touching the frame, body or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.
NOTE Power steering fluid level must be maintained throughout bleed procedure.
  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
    NOTE With hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF . This will discharge the hydro-boost accumulator.
  2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
    1. Start the engine.
    2. Firmly apply the brake pedal 10-15 times.
    3. Turn the engine OFF

  3. Raise the vehicle until the front wheels are off the ground.
  4. With key in the ON position and the engine OFF , turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  5. Verify power steering fluid level per operating specification.
  6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  7. Verify the fluid level. Repeat the bleed procedure if necessary.

Oct 24, 2010 | 2005 Chevrolet Silverado

1 Answer

No brakes or power steering at idle,so far replaced ps pump,steering box,hydro boostwith same result


First thing, check to see if idle is within factory spec. 650/700 in drive. If manual trans, 700 in nuetral. Check for correct belt tension and correct belt routing. Make sure good pressure and return at all fittings. Biggest problems with hydro-boost systems is collapsing return lines. Lack of fluid causes cavitation and unit overheat. Hope this helps. Note: had a ford with factory defect in pressure line in my shop, steel fitting into hose not set correctly, caused pressure to drop under low rpm's. Pressure checks at all fittings very important.

Jan 30, 2010 | 1999 Dodge Ram

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Chevrolet 2500 hd yr 2001 durmax/problem power steering&power brakes out at same time /steering wheel would not move /applied heavy pressure to steering wheel &system works again / at time of...


sounds like your hydro-vac went bad. this is located by your master cylinder inline. it uses your power steering pump to give boost to your brake system instead of a vacumn booster

Dec 24, 2009 | 1999 Chevrolet C/K 2500

1 Answer

Whend i puch the brake pedal make a noise like a cow


This is your hydro boost unit, it runs with assistance of your power steering pump.Check your power steering fluid level, if it's low then top it off.If not then it's time to replace that hydro boost unit.Any other questions get back to me..Thx

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2 Answers

Bubbling during idling or low speed


you mean 70-80 kph? because in mph that is very fast! check your thermostat, and if its not a problem with the thermostat sticking , it may be a problem with your water pump

Apr 16, 2009 | 1999 Ford Crown Victoria

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