Restore performance with expert seal, coupling, and filtration repairs.
Maintenance and repairs
With John Crane Performance Plus™ we deliver maintenance and repairs that's supported by the world's largest mechanical seal service network.
Overview
Whether scheduled or unplanned, John Crane delivers maintenance and repairs supported by the world's largest mechanical seal service network, with over 200 manufacturing, sales and service centres globally.
This enables us to respond quickly, deliver tailored solutions and build lasting partnerships that drive performance. Maintain equipment with precision, restore performance through expert repair, keep operations running stronger for longer.
Our services
Support is available for all John Crane products, including seals, support systems, power transmission couplings and filtration. Our Universal Seal Repair Programmes help keep your operations running stronger for longer, covering both John Crane and non-John Crane mechanical seals.
Repair and refurbishment
- Seal repair and refurbishment
- Asset repair and refurbishment
- Universal Seal and Asset Repair and Refurbishment - non-John Crane
Our Repair and Refurbishment Programmes are supported by long-term agreements, including supplier agreements, primary supplier agreements and frame agreements, which streamline service delivery through pre-agreed pricing, lead times and terms.
These programmes cover both John Crane and non-John Crane seals and other assets, enabling faster quotations, efficient turnaround and access to inventory consignments where applicable.
By restoring seals and other assets to optimal condition, we help reduce downtime, improve reliability and support long-term operational performance.
Wet seals and support systems
Our repair service restores mechanical seals and their support systems to optimal condition through expert disassembly, cleaning, inspection and refurbishment.
By renewing critical components such as seal faces and secondary seals, we help extend equipment life, reduce downtime and improve operational efficiency, returning assets to like-new performance and supporting long-term reliability.
Dry gas seals and support systems
We restore dry gas seals and their support systems to optimal condition through expert disassembly, cleaning, inspection and refurbishment, including static and dynamic testing at John Crane Turbomachinery Service Centres.
This process helps extend seal life, reduce downtime and improve compressor reliability by returning seals to like-new performance and ensuring continued operational integrity.
Power transmission couplings
By replacing damaged flexible membrane assemblies or entire units affected by misalignment or overload, we restore power transmission couplings to optimal condition.
This process helps extend coupling life, reduce downtime and maintain reliable performance across rotating equipment systems.
Filtration
Our filtration service ensures optimal system performance by maintaining, overhauling or replacing filter elements and components within John Crane filtration systems.
By removing contaminants from fluids and gases, we help protect rotating equipment, prevent failures and reduce operational costs to support reliability and efficiency in demanding industrial environments.
Field service and service centre support for all John Crane products
All maintenance and repair services are backed by our global network of service centres, which deliver high-quality repairs across the full range of John Crane products to ensure consistent performance, fast turnaround and trusted technical expertise.
Operational outcomes
Extend equipment life through refurbishment of critical components.
Reduce downtime with fast, reliable service and global support.
Improve reliability across rotating equipment and support systems.
Streamline service with long-term agreements and efficient turnaround.
Support all brands with repair programmes for John Crane and non-John Crane seals.
Access expert help through field service and service centre networks.
Customer success stories
Dry gas mechanical seal refurbishment cuts maintenance time for oil and gas joint venture.
Dry gas mechanical seal refurbishment extends compressor seal life to 20,000+ hours.
Our other John Crane Performance Plus™ services
Seal reliability management
Improve reliability and production throughout your plant.
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Our other John Crane Performance Plus™ services
Asset condition management
Reduce downtime and extend equipment life.
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Our other John Crane Performance Plus™ services
Reliability engineering for maintenance
Turn technical insight into operational advantage.
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Our other John Crane Performance Plus™ services
Upgrades and retrofits
Take advantage of planned downtime to modernise
equipment.
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Our other John Crane Performance Plus™ services
Training
Empower teams to improve uptime, reduce costs, and operate safely and sustainably.
Learn moreFrequently asked questions
Why do mechanical seals fail?
Mechanical seals can fail due to misalignment, wear, contamination, improper installation, or operating beyond design limits. Over time, seal faces and secondary components degrade, leading to leakage or reduced performance. Regular inspection and expert refurbishment help prevent premature failure and extend seal life.
How to change a pump mechanical seal?
Changing a pump mechanical seal involves isolating the equipment, disassembling the seal housing, removing the old seal, and installing a new one with proper alignment and lubrication. John Crane recommends professional service to ensure correct installation and long-term reliability.
How to fix a mechanical seal in a pump?
Fixing a mechanical seal typically requires disassembly, inspection, cleaning, and replacement of worn components. John Crane offers expert repair services for wet and dry gas seals, restoring them to like-new condition through refurbishment and testing, helping reduce downtime and improve pump reliability.
How to repair a mechanical seal with John Crane?
John Crane repairs mechanical seals through expert disassembly, cleaning, inspection, and refurbishment. Services cover both John Crane and non-John Crane seals, supported by long-term agreements for fast turnaround. Repairs restore seals to optimal condition, extend equipment life, and improve operational efficiency.
When and how often should mechanical seals be replaced?
Mechanical seals should be replaced when they show signs of leakage, wear, vibration, or declining performance. Replacement frequency depends on operating conditions, fluid type, and equipment usage. John Crane supports proactive seal management through predictive maintenance, regular inspections, and expert field service, helping to identify optimal replacement intervals, extend seal life, and minimise downtime.
Does replacing seals help prevent leaks?
Yes, replacing worn or damaged seals helps prevent leaks by restoring sealing integrity. John Crane’s repair and replacement services ensure seals perform reliably, reducing product loss, environmental risk, and maintenance costs.
Contact us
Get in touch to find out more about John Crane Performance PlusTM service solutions.