How We Repair Your Unit

We specialize in the overhaul of your MOOG D631-344C, including the replacement of all necessary seals and worn components.

Independent Repair Facility

NC Servo Tech specializes in both valves and electronic controls, which lets us operate without the delays of OEM service centers.

In-house parts inventory eliminates OEM lead time delays for MOOG D631-344C

Frequently Asked Questions

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

Helpful but not required. If you can photograph the label, connectors, and overall unit, it gives our team a head start.

Even if the tag is worn off, we can often match the unit based on shape, size, and internal configuration.

Warranty coverage of our standard 1-year parts and labor warranty is included with every repair we complete.

Send the unit in whatever condition it’s in. We clean everything during teardown before inspection begins.

How We Rebuild This Valve

We rebuild every valve from the inside out: cleaning, inspection, parts replacement, reassembly, and bench testing.

  • Final Performance Verification: After reassembly, each valve undergoes bench-testing against published performance specs.
  • Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.

Testing and Bench Verification

Each MOOG D631-344C is tested on a dedicated flow bench before it ships. We check pressure, flow, leakage, and response characteristics against published specifications. Our functional testing verifies proper functionality.

Maintenance Tips

  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.
  • Conduct thorough visual inspections for wear or leaks during routine maintenance.
  • Store spare MOOG D631-344C valves in a clean, dry environment to prevent corrosion and contamination.

Let Us Repair Your MOOG D631-344C

Request pricing, availability, and turnaround for your MOOG D631-344C. NC Servo Tech provides hands-on repair with a 1-year warranty. Contact us to schedule 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.