Repair Procedure

We specialize in the overhaul of your MOOG 77-1NC, including the replacement of all necessary seals and worn components.

Experience and Warranty

NC Servo Technology operates independently, so we’re not tied to manufacturer delays or restrictions. That means more flexibility when your system is down.

Specializing in MOOG 77-1NC servo valve technology for over five decades

Frequently Asked Questions

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

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

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

If the main housing or board is intact, repair is usually the better option. We can restore most units to working condition with tested parts.

Most repairs are completed within 1 to 3 weeks, depending on workload and parts availability.

Disassembly and Rebuild Procedure

The repair process for the MOOG 77-1NC includes disassembly, diagnostic review, and replacement of failed seals, spools, or other elements. Final assembly includes leak and function testing.

  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • 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.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.

Testing and Bench Verification

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 performance testing verifies consistent performance.

Where the MOOG 77-1NC Is Used

Our expert repair services for the MOOG 77-1NC are trusted across various sectors including Plastics & Injection Molding, Manufacturing, and Marine. We understand the unique demands of valves in these environments.

Turnaround and Shipping

As a focused repair facility for MOOG 77-1NC services, NC Servo Technology targets quick resolution with typical lead times of 2 to 3 weeks. Benefit from our direct access to our technicians to keep your systems running smoothly.

Parts and Inventory

With more than 17,000 valve units in inventory, we can often provide faster turnaround by sourcing parts in-house rather than waiting on OEM lead times.

Maintenance Tips

  • Use only manufacturer-recommended hydraulic fluids to protect internal valve surfaces.
  • Check valve alignment carefully to prevent undue stress on internal components.
  • Inspect MOOG 77-1NC seals regularly to prevent leaks and maintain performance.

Get an Expert Repair for Your MOOG 77-1NC

Request pricing, availability, and turnaround for your MOOG 77-1NC. NC Servo Technology provides warrantied repair with a 1-year warranty. Contact us to request 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.