Key Details

At NC Servo Tech, our shop is equipped to service the MOOG 77-1XX. We use a consistent process to restore each unit to working condition.

Repair Procedure

Each MOOG 77-1XX undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

Frequently Asked Questions

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.

You can send it as-is. We handle all cleaning and preparation as part of our standard process.

Yes, rush service is available for an additional fee. Let us know your deadline when you submit your request.

Yes. Our repairs include a one-year warranty covering parts and labor.

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

Independent Repair Facility

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 77-1XX servo valve technology for over five decades

Rebuild Steps

Our team disassembles each valve to assess internal wear. After ultrasonic cleaning, we install replacements and reassemble and verify operation.

  • 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.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
  • Final Performance Verification: After reassembly, each valve undergoes bench-testing against published performance specs.

Leak and Performance Testing

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 functional testing verifies consistent performance.

Where the MOOG 77-1XX Is Used

Our professional repair services for the MOOG 77-1XX are trusted across various sectors including Manufacturing, Paper & Pulp, and Automotive. We understand the unique demands of valves in these environments.

Repair, Rebuild and Exchange Options

Beyond standard maintenance, we offer specialized reconditioning for your MOOG 77-1XX unit. Our disassembly process includes spool evaluation and reassembly to spec, using only replacement replacement components.

Lead Times and Support

As a focused repair facility for MOOG 77-1XX services, NC Servo Tech 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.

Technical Information

For detailed insights into your MOOG 77-1XX, we can provide access to reports and repair records. This transparency offers you compliance assurance and aids in long-term maintenance planning.

Maintenance Tips

  • Replace inline filters according to maintenance schedules to maintain proper flow rates.
  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.
  • Schedule preventive maintenance intervals based on duty cycle, not just calendar time.

Let Us Repair Your MOOG 77-1XX

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

Request a Quote View All MOOG Products Shop MOOG Inventory

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.