Repair Procedure

Each MOOG D641-363 undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

About Our Shop

Unlike OEM shops, we use our own inventory to handle most rebuilds. That cuts down on lead time and gets your unit back faster.

Specializing in MOOG D641-363 servo valve technology for over five decades

Frequently Asked Questions

Send it in for evaluation. We’ll inspect it and give you a repair-vs-replace recommendation based on the actual condition of the unit.

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

Part of our intake includes troubleshooting to determine the failure point. We report findings before proceeding.

Expedited options are available depending on current scheduling. Contact us to discuss your timeline.

Standard turnaround is 1-3 weeks. Rush options are available for time-sensitive situations.

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.

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

Testing and Bench Verification

Each MOOG D641-363 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 spec-level operation.

Additional MOOG D641-363 Services

Beyond standard maintenance, we offer specialized repairs for your MOOG D641-363 unit. Our teardown process includes disassembly and leak testing, using only replacement replacement components.

Stock Availability

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

Maintenance Tips

  • Keep a spare MOOG D641-363 on hand to minimize downtime during unplanned failures.
  • Document all maintenance activities to track performance trends over time.
  • Schedule preventive maintenance intervals based on duty cycle, not just calendar time.

Start Your MOOG D641-363 Reconditioning Process

Request pricing, availability, and turnaround for your MOOG D641-363. NC Servo Tech provides hands-on repair with a 1-year warranty. Contact us to set up 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.