May 20, 2026

Understanding the PSS Core Return & Surcharge Process

Simple, flexible core returns and collections designed to support efficient remanufacturing across the UK.

Simple, efficient, and reliable remanufacturing support across the UK.

The PSS core return and surcharge process is designed to make remanufacturing simple, efficient, and reliable for customers across the UK. Our dedicated core collection service supports fast exchange unit returns while helping reduce waste through sustainable remanufacturing practices.

By providing flexible collections and transparent surcharge management, PSS helps customers minimise downtime and keep operations moving efficiently.


What Is the PSS Core Return and Surcharge Process?

When purchasing a remanufactured exchange unit from PSS, customers will receive:

  • A main invoice for the replacement unit
  • A separate surcharge invoice linked to the return of the original unit, commonly referred to as the “core”

The surcharge acts as a temporary holding charge until the original unit is returned to PSS.

Once the core is returned and meets our return criteria, the surcharge is credited back in full.


How the Core Return and Surcharge Process Works

1. Exchange Unit Purchased

A surcharge invoice is issued alongside the replacement unit invoice.

2. Return the Original Core

Once the old unit is returned to PSS and inspected, the surcharge is credited in full.

3. 60-Day Return Period

Customers have 60 days from the original invoice date to return eligible core units before the surcharge becomes payable.

However, we understand that operational delays can happen.

4. Extended Credit Window

Eligible cores returned within 12 months can still qualify for full surcharge credit.

As a result, customers have greater flexibility when managing vehicle downtime, repairs, and operational scheduling.

5. Non-Return of Core

If the original unit cannot be returned, the surcharge remains payable.


Flexible UK Core Collection Service

At PSS, our core return and surcharge process is supported by a responsive UK-wide collection service designed around customer convenience.

Flexible Collection Options

Core units can be collected through:

  • PSS fleet vehicles
  • Pre-arranged courier collections

The collection method depends on:

  • Customer location
  • Collection volumes
  • Operational requirements
  • Collection urgency

In addition, customers can request additional collections whenever required.


Dedicated Customer Support

Our dedicated core collection team works closely with customers to:

  • Maintain regular communication
  • Confirm when units are ready
  • Arrange convenient collection times
  • Coordinate efficient returns
  • Minimise disruption to operations

Meanwhile, PSS vans are typically scheduled to visit customer depots monthly, subject to core availability.

Customers can also contact us directly to arrange earlier or additional collections whenever needed.


Supporting Sustainable Remanufacturing

Returning used core units is an essential part of the remanufacturing process.

By recovering and remanufacturing used components, PSS helps:

  • Reduce waste
  • Recover valuable materials
  • Extend component life cycles
  • Lower environmental impact
  • Deliver reliable remanufactured exchange units

Therefore, customers benefit from both cost-effective engineering solutions and more sustainable operational practices.


Why Customers Choose PSS

✔ Simple and transparent core return and surcharge process
✔ Flexible UK-wide core collection service
✔ Dedicated customer support
✔ Reduced downtime and storage issues
✔ Sustainable remanufacturing solutions
✔ Reliable exchange unit turnaround

The PSS core return and surcharge process is designed to provide customers with a reliable and flexible remanufacturing solution that keeps operations moving efficiently.


Frequently Asked Questions

What is a core surcharge?

A core surcharge is a temporary charge applied when purchasing a remanufactured exchange unit. The surcharge is credited once the original unit is returned to PSS and meets return criteria.

How long do I have to return a core?

Customers have 60 days from the invoice date to return eligible core units before the surcharge becomes payable.

Can I still receive surcharge credit after 60 days?

Yes. Eligible cores returned within 12 months may still qualify for full surcharge credit.

Does PSS arrange core collections?

Yes. PSS provides core collections using fleet vehicles and pre-arranged courier services across the UK.

Can I request an additional collection?

Absolutely. Customers can contact PSS directly to arrange earlier or additional collections whenever required.

What happens if a core cannot be returned?

If the original unit cannot be returned, the surcharge remains payable in full.

Why are core returns important in remanufacturing?

Core returns help support sustainable remanufacturing by reducing waste, recovering valuable materials, and extending the life cycle of engineering components.


May 18, 2026

Join the Growing PSS Team: New Automotive Parts Opportunity

Join Our Expanding Parts Team

PSS is continuing its expansion with a new opportunity for an Automotive Parts Sales Advisor to join our growing team at our headquarters in North Walsham, Norfolk.

Established in 1971, PSS is one of the UK’s leading remanufacturers of power steering, drivetrain, hydraulic, and mechanical components for the automotive, commercial vehicle, military, and industrial sectors. From our Norfolk base, we supply customers across the UK and worldwide, supporting workshops, fleet operators, aftermarket distributors, and specialist vehicle businesses.

As part of our continued growth strategy, we are expanding our Parts Department and are looking for a motivated and customer-focused individual to support our increasing demand across the truck, bus, automotive, and Land Rover aftermarket sectors.

Supporting Growth Across Land Rover & Commercial Vehicle Parts

This new Automotive Parts Sales Advisor role will play an important part in supporting customers with vehicle parts enquiries, order processing, technical product support, and day-to-day parts department operations.

The position will particularly focus on remanufactured steering, drivetrain, and hydraulic components, alongside PSS’s recently expanded Land Rover product range, which now includes steering boxes, steering pumps, differentials, gearboxes, and transfer cases.

The successful candidate will work closely with customers throughout the independent aftermarket and commercial vehicle industries while supporting the continued development of the PSS parts operation.

Career Opportunity Within a Growing Engineering Business

This is a permanent full-time office-based role offering long-term career progression within a well-established engineering and remanufacturing business.

Key benefits include:

  • Competitive salary
  • No weekend working
  • Early Friday finish
  • Full product and systems training
  • Supportive team environment
  • Career development opportunities
  • Opportunity to join a respected UK remanufacturing specialist with over 50 years of industry expertise

Previous experience within an automotive parts department, motor factor, commercial vehicle environment, or aftermarket business would be advantageous, although full training will be provided for the right candidate.

Join the PSS Team

As PSS continues to invest in its product range, remanufacturing capabilities, and customer support services, we are looking for enthusiastic individuals who want to build a long-term career within the automotive aftermarket industry.

If you are passionate about automotive parts, customer service, and the commercial vehicle or Land Rover sectors, we would love to hear from you.

To apply, please send your CV along with a short covering note outlining your experience and interest in the role.

May 1, 2026

How to Diagnose Power Steering Problems – Complete Fault Finding Guide

PSS has launched a comprehensive Power Steering Fault Finding Guide designed to help technicians accurately diagnose hydraulic steering problems across trucks, buses, and passenger vehicles. The new guide provides a structured approach to identifying common power steering faults – including pump failure symptoms, steering rack issues, and flow-related problems – while emphasising correct diagnostic procedures to reduce downtime and prevent repeat failures. Covering real-world troubleshooting techniques and best practices, the resource supports workshops and fleet operators in improving steering system performance, reliability, and safety.


Power Steering Fault Finding Guide

Hydraulic Steering System Diagnostics for Trucks, Buses & Cars


Power steering systems in trucks, buses, and passenger vehicles all operate using the same core hydraulic principles. Whether diagnosing heavy steering, noise, or loss of assistance, effective fault finding depends on understanding how hydraulic flow, pressure, and control valves interact to deliver consistent steering performance.

This guide provides a structured, professional framework for diagnosing faults across all hydraulic power steering systems, helping technicians identify root causes quickly and accurately.


⚠️ Important Notice (Manufacturer Compliance)

This guide is intended to support – not replace – vehicle manufacturer manuals.

If any information conflicts with manufacturer guidance, always follow the manufacturer specification.

Always adhere to:

  • Torque settings
  • Steering lock stop (limiter) settings
  • Approved power steering fluid specifications

Failure to follow manufacturer recommendations can result in:

  • Incorrect system operation
  • Component damage
  • Safety risks

1. Hydraulic Power Steering System Overview

A typical hydraulic power steering system consists of:

  • Power steering pump – generates hydraulic flow and pressure
  • Reservoir – stores fluid, supports cooling, and removes air (deaeration)
  • Steering rack or steering box – converts hydraulic energy into mechanical movement
  • Pressure relief valves – limit maximum pressure
  • Flow control / switching valves – regulate and direct hydraulic flow

How Hydraulic Power Steering Works

Hydraulic pressure is generated when fluid flow encounters resistance. This pressure is controlled within the steering gear to produce assisted steering movement based on driver input.

Key System Characteristics

  • Pump output varies with engine speed and demand
  • Steering assistance increases under load
  • Reservoir maintains stable fluid supply
  • Relief valves protect against overpressure
  • Cars typically use rack-and-pinion steering systems
  • Trucks and buses commonly use steering boxes or ram-assisted systems

⚠️ Common Power Steering Misdiagnosis

Many power steering problems are incorrectly blamed on the pump.

In practice, faults often originate from:

  • Steering gear internal failure
  • Flow restrictions or valve faults
  • Contaminated hydraulic fluid

2. Power Steering Contamination (Primary Cause of Failure)

Contamination is one of the leading causes of power steering system failure.

Common Sources of Contamination

  • Incorrect or degraded hydraulic fluid
  • Dirt or moisture ingress during servicing
  • Internal wear debris after component failure
  • Poor or bypassed filtration

Effects on System Performance

  • Abrasive wear in pumps and components
  • Sticking or restricted valves
  • Reduced efficiency and response
  • Premature seal and component failure

⚠️ Repeat Failure Risk

Failure to properly clean the system will almost always cause repeat failure of replacement components.

Residual debris circulates immediately after start-up, causing rapid damage.

Critical Service Requirements

  • Fully flush the hydraulic system after any failure
  • Replace fluid and filters
  • Follow manufacturer service intervals

Best Practice for Contamination Control

  • Use only approved hydraulic fluid
  • Maintain effective filtration
  • Ensure clean working conditions
  • Flush systems whenever contamination is suspected

3. Initial Power Steering Checks

Before advanced diagnostics, confirm basic system condition:

  • Check fluid level and condition (look for contamination or aeration)
  • Inspect hoses, pipes, and connections for leaks or restrictions
  • Verify correct fluid specification
  • Check drive belts and pump drive condition
  • Review any diagnostic data or fault codes

🔧 Diagnostic Tip

Simple issues like low fluid level or air in the system can mimic major component failures.


4. Power Steering Pump Performance & Fault Diagnosis

The power steering pump must deliver correct flow and pressure.

Testing Procedure

  • Measure system pressure under load
  • Measure flow rate (if possible)
  • Compare results with manufacturer specifications
  • Test across different engine speeds

Common Pump Fault Symptoms

  • Low pressure → internal wear or leakage
  • Low flow → restriction or cavitation
  • Unstable output → air ingress or supply issues

⚠️ Key Diagnostic Insight

A pump may produce pressure but still fail if flow is insufficient – both must be correct.


5. Steering Rack or Steering Box Faults

The steering gear converts hydraulic energy into controlled movement.

Common Symptoms

  • Heavy steering
  • Reduced or no assistance
  • Uneven steering response
  • Steering pulling to one side

Root Causes

Hydraulic Issues

  • Internal leakage
  • Worn seals or valves
  • Air in the system

Mechanical Issues

  • Binding joints or linkages
  • Incorrect steering geometry
  • External resistance

🔧 Diagnostic Tip

If pump pressure and flow are correct but steering is heavy, the fault is likely within the steering rack or box.


6. Pressure Relief Valve Faults

Relief valves regulate maximum system pressure.

Fault Indicators

  • High pressure → valve stuck closed
  • Low pressure → valve stuck open or misadjusted

7. Flow Control Valve Faults

Flow control valves regulate fluid delivery within the system.

Symptoms

  • Slow steering response
  • Uneven assistance left vs right
  • Overheating

⚠️ Common Misdiagnosis

Flow restrictions are often incorrectly diagnosed as pump failure.


8. Power Steering Noise, Vibration & Intermittent Faults

Common Causes

  • Air ingress (aeration)
  • Contaminated fluid
  • Pump cavitation
  • Component wear
  • Pressure fluctuations

Diagnostic Checks

  • Bleed the system
  • Inspect reservoir for foaming
  • Check suction lines for leaks
  • Test system under load

🔧 Diagnostic Tip

Milky or foamy fluid indicates air in the system, causing inconsistent steering.


9. Common Power Steering Problems & Causes

Heavy Steering

  • Low pump output
  • Steering gear leakage
  • Flow restriction

Steering Pulling to One Side

  • Uneven hydraulic pressure
  • Mechanical imbalance
  • Internal steering gear fault

Noisy Power Steering

  • Air in system
  • Fluid contamination
  • Pump wear or cavitation

Intermittent Steering Assistance

  • Air in fluid
  • Flow control issues
  • Pump inconsistency

Steering Box Travel & Lock Stop Adjustment

Incorrect steering travel is often caused by improper limiter (lock stop) settings, not faulty components.


🔧 Steering Limiter Adjustment Guide

Manual Limiters

  • Adjust under load at full lock
  • Set both directions evenly
  • Confirm equal steering travel

Automatic Limiters

  • Turn to full mechanical stop
  • Hold briefly to allow setting
  • Repeat both directions
  • Cycle steering fully

⚠️ Important

Incorrect limiter settings can cause:

  • Uneven steering travel
  • Excessive stress on components
  • Premature steering gear failure

10. Power Steering Diagnostic Equipment

Essential tools:

  • Hydraulic pressure gauge
  • Flow meter
  • Diagnostic scanner
  • Temperature measurement tools

🔧 Testing Tip

Always test under real operating conditions—not just static checks.


11. Power Steering Best Practices

  • Follow manufacturer specifications
  • Maintain system cleanliness
  • Diagnose before replacing parts
  • Verify repairs
  • Record results

⚠️ Key Reminder

Poor flushing and filtration are the leading causes of repeat failures.


12. Summary: Power Steering Fault Finding

Effective diagnosis depends on:

  • Understanding flow, pressure, and mechanical interaction
  • Following structured diagnostic procedures
  • Identifying root causes – not symptoms
  • Maintaining system cleanliness

Accurate fault finding improves:

  • Steering reliability
  • Vehicle safety
  • Component lifespan
  • Repair efficiency

Need Technical Support?

Contact PSS for expert advice, diagnostics, and replacement components.