How We Repair Your Unit

We specialize in the overhaul of your MOOG 631-172C, including the replacement of all necessary seals and worn components.

About Our Shop

As a specialized repair facility, we have dedicated test equipment that general-purpose shops don’t. That means your MOOG 631-172C gets serviced by people who work on these units regularly.

Factory-level test stands dedicated to MOOG 631-172C performance verification

Frequently Asked Questions

Most repairs are completed within 1 to 3 weeks, depending on workload and parts availability.

Yes. Photos of the nameplate and overall unit let us begin identification before it arrives, which speeds up the process.

If the main housing or board is intact, repair is usually the better option. We can restore most units to working condition with tested parts.

Yes, a 12-month warranty on parts and labor is standard on all repairs. Details are provided with your service report.

We regularly work on units with missing labels. Send us a few images and any visible part numbers, and we can usually match it.

Repair Process

Once a valve arrives, we tear it down fully, examine key surfaces, and replace worn or damaged parts using components we stock in-house, cutting out OEM lead times.

  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
  • 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.

Leak and Performance Testing

With our 13-stand test facility 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 pre-shipment testing verifies consistent performance.

Industries We Serve

Our trusted repair services for the MOOG 631-172C are trusted across various sectors including Power Generation, Aerospace, and Manufacturing. We understand the unique demands of valves in these environments.

Additional MOOG 631-172C Services

Beyond standard maintenance, we offer specialized reconditioning for your MOOG 631-172C unit. Our disassembly process includes internal inspection and pressure testing, using only replacement replacement components.

Documentation on Request

For detailed insights into your MOOG 631-172C, we can provide access to service logs and repair records. This transparency offers you peace of mind and aids in long-term maintenance planning.

Maintenance Tips

  • Monitor operating temperatures to identify potential issues before failure occurs.
  • Use only manufacturer-recommended hydraulic fluids to protect internal valve surfaces.
  • Perform fluid analysis to detect contamination early and prevent system damage.

Schedule Your MOOG 631-172C Service Today

Request pricing, availability, and turnaround for your MOOG 631-172C. NC Servo Tech provides hands-on repair with a 1-year warranty. Contact us to start your repair.

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NC Servo Tech is an independent third-party repair facility. We are not affiliated with, endorsed by, sponsored by, or authorized by MOOG or any original equipment manufacturer (OEM), nor do we claim to be a MOOG 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.