Key Details

We’ve serviced hundreds of MOOG D664-353N units over the years. Each one goes through the same controlled teardown, parts replacement, and testing process.

Inspection and Repair Process

Each MOOG D664-353N undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

Frequently Asked Questions

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

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

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

We recommend sending pictures, especially if the model number is unclear or there is visible damage.

We give you a straight assessment after inspection. If repair doesn’t make sense, we’ll let you know and discuss alternatives.

Why Repair With NC Servo

We stock common wear parts in-house, so most rebuilds don’t require outside sourcing. Less waiting, faster turnaround.

17,000+ valves in stock including MOOG D664-353N exchange units

Disassembly and Rebuild Procedure

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

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

Diagnostic Testing

Each MOOG D664-353N is tested on a dedicated flow bench before it ships. We check pressure, flow, leakage, and response characteristics against published specifications. Our pre-shipment testing verifies consistent performance.

MOOG D664-353N Specifications

Every MOOG D664-353N we service is tested under operating environments. Our diagnostics verify performance against published specifications. Technical diagrams and Specification sheets are available for purchase upon request.

Additional MOOG D664-353N Services

Beyond standard maintenance, we offer specialized reconditioning for your MOOG D664-353N unit. Our disassembly process includes bench testing and internal inspection, using only new replacement components.

Turnaround and Shipping

As a dedicated source for MOOG D664-353N services, NC Servo Tech 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.

Maintenance Tips

  • Document all maintenance activities to track performance trends over time.
  • Monitor operating temperatures to identify potential issues before failure occurs.
  • Flush the hydraulic system after any major repair to remove debris before reinstalling the MOOG D664-353N.

Ready to Restore Your MOOG D664-353N?

Request pricing, availability, and turnaround for your MOOG D664-353N. NC Servo Tech provides experienced 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.