Hydraulic System: Testing and Inspection

Diagnosis Of The Hydraulic Booster System:

HYDRAULIC SYSTEM FLUID LOSS

CAUTION: Do not run the engine without fluid in the power steering pump reservoir. Doing so could damage the pump bearings and seals. The belt that drives the power steering pump also drives the coolant pump and other components. Do not disconnect the belt and run the engine. A malfunctioning power steering pump and/or system still serves as an idler pulley for the belt. If the pump is allowed to run without fluid in it, the bearings will seize up and cause the coolant pump to stop. This can cause damage to the engine.

If the hydraulic booster system fails due to a loss of fluid, the following steps should be taken before starting the vehicle.
^ If the failed part is not the power steering pump, route the pressure pipe back to the fluid reservoir.
^ Make all necessary repairs. Fill and bleed the power steering system. Refer to Steering and Suspension.
The hydraulic booster system should be cleaned and flushed when the power steering pump is replaced. Metal shavings from a worn power steering pump often contaminate the system. Pipes and hoses should be removed and blown clean of all metal shavings. Refer to Steering and Suspension for information.

BELT TENSION
When servicing any part of the brake system, check the power steering pump belt tension and condition. The serpentine belt is not adjustable.

FLUID LEVEL INSPECTION
When servicing any part of the brake system, check the level in the power steering fluid reservoir. The fluid level in the reservoir should be checked at regular intervals and added as needed.

PIPES, HOSES, AND FITTINGS
All pipes hoses and fittings should be inspected for leaks at regular intervals. The fittings must be tight and all clips, clamps, and unions supporting the pipes and hoses must be in place and properly secured. Make sure all hoses and tubes are installed so they do not contact parts of the vehicle that could cause chafing or wear on the hoses.
Check for leaks by wiping the suspected area clean. Leaking fluid can be easily spotted when the suspected area is clean. When fluid leaks appear, tighten, repair, or replace nearby fittings and bolts.