Mercedes-Benz 500SEC Power Steering Pump Replacement Cost
How Much Does a Power Steering Pump Replacement Cost?
Power Steering Pump Replacement Service and Cost
Hydraulic power steering systems use a pump to provide pressurized hydraulic fluid so work can be done. The power steering pump pressurizes and circulates power steering fluid through the power steering hydraulic system, allowing the steering wheel to turn with greater ease.
Power steering pumps create hydraulic pressure, and the hoses transfer the pressure to the steering gear, where it will be used to assist the driver turning the wheels, and the other hose will return the used fluid to be pressurized. This process happens continuously, and the power steering pump will pressurize fluid any time the engine is running.
A vehicle can be driven with weeping or leaking power steering components. However, it will be necessary to pay close attention to the power steering fluid level to make sure there's enough fluid for the system to function. If the fluid is actively dripping or pouring out of a leak, a tow truck is recommended to prevent damage to the pump, steering gear, or loss of power steering assist while driving.
For most vehicles, the power steering system will last well over 100,000 miles before any failures occur. Mechanical failures and leaks in the power steering system are considered usually avoidable if maintenance has been performed according to the manufacturer service intervals. Keeping the power steering fluid fresh, and the system free of contaminants is the key to ensuring long power steering system life. As any system that carries high pressure will, the system will eventually fail from normal wear and tear, but this should be well into the serviceable life of the vehicle.
Power Steering Pump Replacement Repair Information
Since most power steering issues will generate the same symptoms, it would be difficult to diagnose only one part, without understanding the condition of the whole system. When symptoms emerge, the power steering fluid is inspected, and topped off, and the condition, and tension of the power steering pump belt is noted. The system may need to be bled of air prior to diagnosis. Any leaks will become very obvious at that time, and mechanical failure of the power steering pump will be evident from noise, or a pressure gauge inserted into the power steering line. At that time, if no other issues are found, the steering rack or steering gearbox will be suspected of failure. Any dust boots and seals will be inspected for leaks. The rack and pinion gear set will be inspected for sounds typical of mechanical failure. This systematic approach will lead a technician to a diagnosis.
To replace the power steering pump, the power steering fluid will need to be drained from the system. The serpentine or power steering belt will be removed from the pump pulley, the steering hoses will be removed from the pump, and the pump will be unbolted from its mounting position on the engine block. A new pump will then be installed, the lines attached, the belt reinstalled, and the fluid refilled. The system will be bled of air, and checked for proper functionality to ensure a complete repair.
When having the power steering pump replaced, the power steering fluid hoses and related components should be inspected. Any debris in the power steering pump may have worked itself into the whole steering system, necessitating replacement of the hoses, and at least flushing of the steering rack or steering gearbox. When ordering parts, it is important to note if the replacement part includes the fluid resevoir or not, as it is cost effective to replace the aging plastic reservoir at the same time.
Power steering components are subject to high pressure, high heat, and high speeds. Selecting parts that are built to meet or exceed OEM standards will help ensure the longevity of the power steering hydraulic system. Inferior parts tend to lead to repeated replacement.
Replacing a power steering pump can be a good DIY repair for the advanced DIYer. This task will require draining and refilling the power steering system, and bleeding the power system to purge any trapped air. A torque wrench is necessary for the high side line in many occasions, as the brass washers must be tightened to specification to prevent leaks. If the power steering pump mounting bolts are integrated into other components, and many components must be removed, consider letting a certified technician handle this job to prevent damage to the engine.