How We Repair Your Unit

Our process involves a teardown of your NC Servo D631-5NC, ultrasonic cleaning, and reassembly with quality parts to restore operation.

About Our Shop

Unlike OEM shops, we use our own inventory to handle most rebuilds. That cuts down on lead time and gets your unit back faster.

Frequently Asked Questions

Yes. We diagnose first, then provide a repair recommendation with our findings. No work begins without your approval.

Yes, rush service is available for an additional fee. Let us know your deadline when you submit your request.

If a unit is beyond repair, we explain why and can discuss replacement or exchange options.

Yes. Our technicians can often identify units based on photos, dimensions, or manufacturer markings. Send a photo before shipping to speed up intake.

Not required, but removing excess oil or loose debris before packing helps keep things clean in transit.

How We Rebuild This Valve

Each valve goes through teardown to expose wear and buildup. After mineral bath cleaning, we replace damaged parts and reassemble the unit to spec.

  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Teardown: Every valve is disassembled for internal inspection.
  • Final Performance Verification: After reassembly, each valve undergoes bench-testing against published performance specs.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.

Diagnostic Testing

With thirteen in-house test stands and a Hagenbush proportional valve system, we verify flow curves, hysteresis, frequency response, and more. Performance reports and graphs are available for purchase on request. Our performance testing verifies consistent performance.

Technical Specifications

Every NC Servo D631-5NC we service is tested under operating environments. Our diagnostics verify performance against published specifications. Specification sheets and Technical diagrams are available for purchase upon request.

Maintenance Tips

  • Replace inline filters according to maintenance schedules to maintain proper flow rates.
  • Schedule preventive maintenance intervals based on duty cycle, not just calendar time.
  • Check system pressure regularly to verify it stays within the NC Servo D631-5NC rated operating range.

Ready to Restore Your NC Servo D631-5NC?

Request pricing, availability, and turnaround for your NC Servo D631-5NC. NC Servo provides experienced repair with a 1-year warranty. Contact us to request your repair.

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NC Servo is an independent third-party repair facility. We are not affiliated with, endorsed by, sponsored by, or authorized by NC Servo or any original equipment manufacturer (OEM), nor do we claim to be a NC Servo service center. All brand names, trademarks, model numbers, and part numbers referenced on this page are the property of their respective owners and are used solely for identification and compatibility purposes.