Inspection and Repair Process

Each MOOG D664-4015 undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

Why Repair With NC Servo

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

Frequently Asked Questions

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

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

It depends on the unit and scope of work. We provide an estimated timeline after initial evaluation.

We confirm next steps with you if a unit can’t be rebuilt. No work proceeds without your approval.

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

Rebuild Steps

The repair process for the MOOG D664-4015 includes disassembly, diagnostic review, and replacement of failed seals, spools, or other elements. Final assembly includes leak and function testing.

  • Teardown: Every valve is disassembled for internal inspection.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Final Performance Verification: After reassembly, each valve undergoes bench-testing against published performance specs.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.

Hydraulic Testing Process

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 operational testing verifies spec-level operation.

Industries We Serve

Our expert repair services for the MOOG D664-4015 are trusted across various sectors including Defense, Industrial Machinery, and Power Generation. We understand the unique demands of valves in these environments.

Repair, Rebuild and Exchange Options

Beyond standard maintenance, we offer specialized overhauls for your MOOG D664-4015 unit. Our overhaul process includes reassembly to spec and spool evaluation, using only new replacement components.

Lead Times and Support

As a specialist for MOOG D664-4015 services, NC Servo Technology targets quick resolution with typical lead times of 1 to 3 weeks. Benefit from our direct access to our technicians to keep your systems running smoothly.

Technical Information

For transparent insights into your MOOG D664-4015, we can provide access to service logs and reports. 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.
  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.
  • Check valve alignment carefully to prevent undue stress on internal components.

Need Your MOOG D664-4015 Back Online?

Request pricing, availability, and turnaround for your MOOG D664-4015. NC Servo Technology provides independent repair with a 1-year warranty. Contact us to set up 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.