Wednesday, February 8, 2012

How to Replace power steering pump on Chevy silverado 2500 HD?

The procedure is as follows :----

4.3L Engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2. Disconnect the hoses at the pump. When the hoses are disconnected, secure the ends in a raised position to prevent leakage. Cap the ends of the hoses to prevent the entrance of dirt.
  3. Cap the pump fittings.
  4. Loosen the belt tensioner.
  5. Remove the pump drive belt.
  6. Remove the pulley with a pulley puller such as J-29785-A.
  7. Remove the following fasteners front mounting bolts
  8. Lift out the pump.
To install:
  1. Observe the following torque:

    Front mounting bolts: 37 ft. lbs. (50 Nm)
  2. Install the pulley with J-25033-B.
  3. Install the drive belt.
  4. Install the hoses.
  5. Fill and bleed the system.

Except 4.3L Engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2. Remove or disconnect the following:

    Upper radiator fan shroud, if necessary
    Drive belt
    Nut and clamp retaining the filler neck to the power steering pump, if equipped
  3. Place a drain pan under the pump. Remove the hoses from the pump.

    Bolts from the rear of the pump
    Bolts from the front of the pump
    Pump from the vehicle

    Click image to see an enlarged view
    Fig. Power steering pump-4.8L, 5.3L and 6.0L engines shown
To install:
  1. Install or connect the following:

    Power steering pump
    Bolts to the front and the rear of the pump. Tighten the bolts to 37 ft. lbs. (50 Nm)
    Hoses to the pump. Tighten the nut to 20 ft. lbs. (28 Nm)
    Nut and clamp retaining the filler neck to the power steering pump, if equipped
    Pulley. Install the pulley with 0.020 in (0.5 mm) play
    Drive belt
    Upper radiator shroud.
  2. Fill and bleed the power steering system.

Filling & Bleeding procedure is as follows :----

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.

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.
    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.

This will help.

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