What is the Function of Power Steering?

Power steering is an essential system in modern vehicles, designed to assist drivers in steering by augmenting the torque applied to the steering wheel. This system makes it significantly easier to turn the wheels, especially at low speeds or when the vehicle is stationary.


Understanding the Importance of Power Steering in Vehicle Maintenance

Basic Mechanics of Power Steering Systems

At its core, a power steering system consists of several key components:

Power Steering Pump: 

This hydraulic pump is driven by the engine via a belt and pulley. It generates the hydraulic pressure needed to assist steering.

Steering Gear (or Rack and Pinion): 

This mechanism translates the rotational motion of the steering wheel into the linear motion needed to turn the wheels. The hydraulic pressure helps move the gear, reducing the effort required from the driver.

Hydraulic Fluid: 

Special power steering fluid is circulated by the pump through hoses and valves, creating the necessary pressure.

Control Valve: 

This valve senses the force applied by the driver on the steering wheel and directs the hydraulic fluid to assist in steering the wheels.

In electronic power steering (EPS) systems, an electric motor replaces the hydraulic pump, and sensors detect the driver’s input to provide the appropriate level of assistance. This type of system is more energy-efficient and can be fine-tuned for different driving conditions.

Importance of Power Steering Systems

Power steering is crucial for several reasons:

Enhanced Vehicle Control: 

By reducing the effort required to turn the steering wheel, power steering systems enable more precise control of the vehicle. This is particularly important during tight manoeuvres, such as parking or navigating through narrow streets.

Improved Driving Comfort: 

Power steering significantly reduces the physical strain on drivers. This is especially beneficial for long drives or in urban environments with frequent stops and turns.


With power steering, drivers can respond more quickly and accurately to emergency situations, improving overall road safety.


Power steering makes driving accessible to a broader range of people, including those who may lack the physical strength to operate a vehicle without assistance.

Overall, power steering systems play a vital role in modern automotive design, enhancing both the performance and comfort of vehicles. Regular maintenance and timely repairs are essential to ensure these systems continue to function effectively, providing drivers with the control and ease needed for safe and enjoyable driving.

What are the Symptoms of a Failing Power Steering Pump?

A failing power steering pump can significantly affect the performance and safety of your vehicle. Here are some common symptoms to watch out for:

1. Whining Noises

One of the most noticeable signs of a failing power steering pump is a whining or groaning noise, especially when you turn the steering wheel. This sound often indicates that the power steering fluid is low, contaminated, or that the pump itself is malfunctioning.

2. Difficulty Steering

If you find it harder to turn the steering wheel, especially at low speeds or when the vehicle is stationary, this can be a clear indicator that the power steering pump is failing. The pump is responsible for generating the hydraulic pressure needed to assist with steering, and any reduction in this pressure can make steering more difficult.

3. Power Steering Fluid Leaks

Leaks are another common symptom of power steering pump problems. You might notice puddles of power steering fluid under your vehicle, which can range in colour from reddish-brown to amber. Leaks can occur due to damaged seals, hoses, or the pump itself, leading to a decrease in hydraulic pressure and performance.

4. Squealing Belts

A failing power steering pump can also cause the belt that drives the pump to slip or squeal. This can happen due to misalignment, wear, or the pump seizing up. Squealing noises often occur when starting the engine or making sharp turns.

5. Steering Wheel Vibrations

Unusual vibrations or pulsations in the steering wheel when turning can indicate a problem with the power steering pump. These vibrations are usually a result of inconsistent hydraulic pressure being delivered to the steering system.


Understanding the Importance of Power Steering in Vehicle Maintenance

Potential Dangers of Ignoring These Symptoms

Ignoring the symptoms of a failing power steering pump can lead to several serious issues:

1. Increased Risk of Accidents

Difficulty in steering can compromise your ability to control the vehicle, especially during emergency manoeuvres or when navigating tight spaces. This increases the risk of accidents and collisions.

2. Further Damage to the Steering System

Operating a vehicle with a failing power steering pump can cause additional wear and tear on other components of the steering system, such as the steering rack, hoses, and belts. This can lead to more extensive and costly repairs.

3. Total Loss of Power Steering

If the pump fails completely, you could lose power steering assistance altogether. While it is still possible to steer the vehicle manually, it requires significantly more effort and can be dangerous, particularly for drivers who are not accustomed to it.

4. Engine Overheating

In hydraulic power steering systems, a failing pump can place additional strain on the engine, potentially leading to overheating. This can cause further damage to the engine and reduce the overall reliability of your vehicle.

It’s crucial to address any symptoms of a failing power steering pump promptly. Regular maintenance and inspections can help identify issues early and prevent more serious problems. If you experience any of the symptoms mentioned, it’s advisable to contact a professional service provider, like National Power Steering, to diagnose and repair the problem, ensuring your vehicle remains safe and easy to drive.

Can a Steering Pump Be Repaired?

Yes, a power steering pump can often be repaired, depending on the nature and extent of the damage. However, there are specific circumstances that determine whether repair is viable or if replacement is necessary.

When Can a Power Steering Pump Be Repaired?

Minor Wear and Tear: 

If the pump exhibits minor wear and tear, such as worn seals, bearings, or gaskets, it can often be repaired. Replacing these components can restore the pump’s functionality without the need for a complete replacement.

Leaking Seals: 

Seals within the pump can degrade over time, leading to fluid leaks. Replacing these seals is a common repair that can extend the life of the pump.

Clogged Valves or Filters: 

Sometimes, debris can clog the valves or filters in the pump, affecting its performance. Cleaning or replacing these elements can resolve the issue.

Low Fluid Levels: 

If the problem is due to low fluid levels caused by leaks in the hoses or connections, repairing these leaks and refilling the fluid can restore proper pump function.

When Does a Power Steering Pump Need to Be Replaced?

Severe Damage: 

If the pump has suffered severe internal damage, such as a cracked housing or extensive corrosion, it is generally more cost-effective to replace the entire pump rather than attempting a repair.

Worn Out Components: 

When major components, such as the pump’s rotor or vane, are excessively worn or damaged, replacement is often the best option to ensure reliable performance.

Repeated Failures: 

If the pump has been repaired multiple times and continues to fail, it indicates that the pump has reached the end of its service life and should be replaced.

Contaminated Fluid: 

If the power steering fluid is contaminated with metal shavings or other debris, it can indicate severe internal wear that necessitates a full replacement.

Expertise Required for Effective Repair

Repairing a power steering pump requires specialised knowledge and skills:


Accurate diagnosis is crucial to determine the exact cause of the problem. This involves inspecting the pump, checking for leaks, testing pressure levels, and examining the fluid condition.

Disassembly and Reassembly: 

The pump must be carefully disassembled to access internal components. This requires precision to avoid damaging delicate parts.

Component Replacement: 

Identifying and replacing faulty components, such as seals, bearings, or valves, demands expertise and the right tools.

Testing and Calibration: 

After repair, the pump must be tested and calibrated to ensure it operates correctly within the vehicle’s steering system.


Understanding the Importance of Power Steering in Vehicle Maintenance

Benefits of Opting for Professional Services

Quality Assurance: 

Professional technicians have the training and experience to perform repairs accurately, ensuring the pump functions reliably after repair.

Specialised Tools and Equipment: 

Professionals have access to specialised tools and diagnostic equipment that are essential for effective repair and testing.

Time and Cost Efficiency: 

While DIY repairs might seem cost-effective, professional services can save time and prevent further damage, ultimately saving money by avoiding repeated repairs or replacements.

Warranty and Guarantee: 

Many professional repair services offer warranties on their work, providing peace of mind that the repair is backed by a guarantee of quality.


Ensuring the power steering system is repaired correctly is crucial for vehicle safety. Professionals can ensure that the repair meets all safety standards and regulations.

Understanding when a power steering pump can be repaired versus when it needs to be replaced is crucial for maintaining your vehicle’s performance and safety. Opting for professional services ensures that repairs are conducted with the necessary expertise and precision, providing reliable and long-lasting solutions. If you suspect issues with your power steering pump, contacting National Power Steering can provide the expert assistance needed to keep your vehicle running smoothly and safely.

How Do You Fix Power Steering?

Fixing power steering involves diagnosing the specific issue and applying the appropriate repair method. Power steering systems can develop a range of problems, each with distinct symptoms.

Common Power Steering Issues and Their Symptoms

  1. Low Power Steering Fluid:

    • Symptoms: Whining or groaning noise when turning the steering wheel, stiff or difficult steering.
    • Cause: Leaks in the system, often from seals, hoses, or the pump.
  2. Power Steering Pump Failure:

    • Symptoms: Whining noise, difficulty steering, fluid leaks.
    • Cause: Wear and tear on the pump’s internal components, often due to age or contamination.
  3. Steering Rack Issues:

    • Symptoms: Loose or wandering steering, uneven tyre wear, fluid leaks.
    • Cause: Worn-out rack and pinion gears or damaged seals.
  4. Hose and Line Leaks:

    • Symptoms: Puddles of power steering fluid under the vehicle, difficulty steering.
    • Cause: Cracks or breaks in the hoses and lines carrying power steering fluid.
  5. Contaminated Power Steering Fluid:

    • Symptoms: Noises when turning, stiff steering, reduced power assist.
    • Cause: Dirt, debris, or metal particles in the fluid.

Step-by-Step Overview of the Diagnostic and Repair Process

  1. Initial Inspection:

    • Visual Check: Look for visible leaks, inspect hoses and lines for cracks, and check the power steering fluid level and condition.
    • Listen for Noises: Identify any unusual sounds when turning the steering wheel, which can indicate specific issues.
  2. Diagnosing the Problem:

    • Check Fluid Level: Low fluid often indicates a leak. Top up the fluid and check for any dripping or pooling under the vehicle.
    • Pressure Test: Use a power steering pressure gauge to check the pressure levels in the system, which can help pinpoint issues with the pump or rack.
    • Inspect the Pump: Look for signs of wear, damage, or leaks around the power steering pump.
    • Examine the Steering Rack: Check for play in the steering rack and look for any signs of leaks or damage.
  3. Repairing the Issue:

    • Fixing Leaks: Replace any damaged hoses or seals to stop fluid leaks. Ensure all connections are tight and secure.
    • Replacing the Pump: If the pump is faulty, it will need to be replaced. This involves:
      • Draining the power steering fluid.
      • Removing the drive belt and pump mounting bolts.
      • Installing the new pump and reconnecting the drive belt.
      • Refilling the system with power steering fluid.
  • Repairing the Steering Rack: 

Depending on the issue, you might need to replace seals or the entire rack. This involves:

  • Lifting the vehicle and removing the wheels.
  • Disconnecting the tie rod ends and steering column.
  • Removing the old rack and installing the new one.
  • Reconnecting the tie rods and steering column.
  • Flushing the System: 

If the fluid is contaminated, flush the entire system with clean power steering fluid to remove debris and contaminants.

  1. Testing and Calibration:

    • Bleed the System: Remove any air trapped in the system by turning the steering wheel from lock to lock several times with the engine running.
    • Test Drive: Check for proper operation and ensure there are no noises, leaks, or difficulties in steering.


Understanding the Importance of Power Steering in Vehicle Maintenance

Importance of Professional Service for Complex Repairs

While some power steering repairs can be performed by knowledgeable DIY enthusiasts, many require professional expertise:

Accurate Diagnosis: 

Professionals have the tools and experience to accurately diagnose the issue, ensuring that the correct repair is performed.

Specialised Equipment: 

Certain repairs, such as pressure testing and system flushing, require specialised equipment that most vehicle owners do not have.

Complex Procedures: 

Repairs involving the steering rack or pump can be complex and require precise handling to avoid further damage or safety issues.

Quality Assurance: 

Professional services come with warranties and guarantees, providing peace of mind that the repair will be durable and reliable.


Properly functioning power steering is critical for vehicle safety. Ensuring that repairs are done correctly minimises the risk of accidents due to steering failure.

Fixing power steering issues involves a thorough diagnostic process and precise repairs. While minor issues can sometimes be handled independently, more complex problems should be addressed by professionals to ensure safety and reliability. National Power Steering offers expert services to diagnose and repair power steering systems, ensuring your vehicle remains safe and easy to drive. If you experience any issues with your power steering, don’t hesitate to contact us for professional assistance.

Contact National Power Steering today to get your power steering checked and ensure your vehicle remains safe and easy to drive. Our team of experienced professionals is ready to provide expert diagnostics, repairs, and maintenance to keep your power steering system in top condition. Don’t wait until a minor issue becomes a major problem—reach out to us now for reliable and quality service.