How We Repair Your Unit

We specialize in the overhaul of your MOOG D661-365A, including the replacement of all necessary gaskets and worn components.

Experience and Warranty

We’ve built our shop around one thing: industrial repair. With decades of hands-on experience and deep product knowledge, we deliver consistent results.

Specializing in MOOG D661-365A servo valve technology for over five decades

Frequently Asked Questions

You’ll hear from us either way. If it’s not repairable, we’ll return the unit and provide our findings.

Inspection and root-cause analysis are part of our standard process. We identify the issue before starting any repair work.

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

No cleaning required. Our repair process includes disassembly and cleaning of all components.

All repairs come with our standard 1-year parts and labor warranty. Contact us for specifics on your unit.

How We Rebuild This Valve

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.

  • Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.

Hydraulic Testing Process

With over a dozen dedicated flow 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 functional testing verifies spec-level operation.

Performance Data

Every MOOG D661-365A we service is tested under typical applications. Our diagnostics verify performance against published specifications. Specification sheets and Cycle life data are available for purchase upon request.

Repair, Rebuild and Exchange Options

Beyond standard maintenance, we offer specialized reconditioning for your MOOG D661-365A unit. Our overhaul process includes bench testing and seal replacement, using only replacement replacement components.

Parts and Inventory

With an extensive stock of 17,000+ valves, we can often provide faster turnaround by sourcing parts in-house rather than waiting on OEM lead times.

Maintenance Tips

  • Monitor operating temperatures to identify potential issues before failure occurs.
  • Conduct thorough visual inspections for wear or leaks during routine maintenance.
  • Store spare MOOG D661-365A valves in a clean, dry environment to prevent corrosion and contamination.

Get a Free Evaluation for Your MOOG D661-365A

Request pricing, availability, and turnaround for your MOOG D661-365A. NC Servo Technology provides warrantied repair with a 1-year warranty. Contact us to start your repair.

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NC Servo Technology 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.