GM 7839787 Pump Assembly, P/S

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Remove the hydraulic hoses either from the pump or the steering gear and suspend them in the raised position to avoid loss of fluid prior to plugging. To do this loosen the two black nuts on the sides and the green nut of pump mounts; this should push the pump towards the engine releasing the belt. Remove the screws and nuts of the pump mounting and the braces, and then withdraw the pump. In order to replace the pump pulley, a special extractor will probably be required and the exact type of extractor will depend upon the actual pulley; check with your dealer if necessary. This involves the reverse process of that of removal, and care has to be taken to tighten the hose unions to the recommended torque, before charging the fluid reservoir. To apply prime, rotate the pulley in the opposite direction to normal for as long of time until no more bubbles will rise from the fluid, after this look through the reservoir filler cap. Last, there is the drive belt which should be properly fitted and then the belt should be tensioned before the system is bled.

Raise the front of the car and support it with jackstands. Remove the radiator hose clamp bolt. Disconnect the pressure hose from its fitting on the rear of the pump. Remove the clamp that secures the flexible return hose to its rigid steel line and disconnect the hose from the line. Loosen the pump's attaching bolts and nuts, move the pump toward the engine and remove the belt from the pulley. Remove the bolt and spacer used in the upper rear mounting location of the pump that holds the pump to the bracket. Remove the 3 bolts that hold the left pump bracket to the engine block. Remove the pump and left pump bracket. Remove the pump from the pump bracket. Remove the 3 bolts that secure the right pump bracket to the pump. If the power steering pump needs replacing, a rebuilt unit can be obtained and is less expensive than a new pump. Install the pump by reversing the removal procedure. Adjust the belt tension. Bleed the power steering system.

Adjust the belt tension and bleed the power steering system.

Use jackstands to raise the front of the car and support it.

Prime the pump by turning the pulley in the opposite direction of normal rotation until air bubbles stop emerging from the fluid observed through the reservoir filler cap.

Remove the pump drive belt by loosening the pump mounts and pushing it towards the engine.

Disconnect the pressure and return hoses at the connections.

Disconnect the heater hose at the water pump.

Remove the pump from the pump bracket.