MOOG 771-174
Stop searching for a MOOG 771-174 replacement. Repair often restores the valve to working condition at a fraction of new-unit cost.
Representative image — actual product may differ
Teardown and Rebuild Steps
Our repair process for the MOOG 771-174 begins with teardown and mineral bath cleaning to assess all components.
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.
Frequently Asked Questions
It depends on the unit and scope of work. We provide an estimated timeline after initial evaluation.
Warranty coverage of a one-year warranty is included with every repair we complete.
Send the unit in whatever condition it’s in. We clean everything during teardown before inspection begins.
Part of our intake includes troubleshooting to determine the failure point. We report findings before proceeding.
Yes. Photos of the nameplate and overall unit let us begin identification before it arrives, which speeds up the process.
Repair Process
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.
- In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
- Teardown: Every valve is disassembled for internal inspection.
- Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
Diagnostic Testing
With over a dozen dedicated flow test stands 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 proper functionality.
Performance Data
Every MOOG 771-174 we service is tested under typical applications. Our diagnostics verify performance against published specifications. Cycle life data and Performance data are available for purchase upon request.
Maintenance Tips
- Replace inline filters according to maintenance schedules to maintain proper flow rates.
- Monitor operating temperatures to identify potential issues before failure occurs.
- Check system pressure regularly to verify it stays within the MOOG 771-174 rated operating range.
Request a Quote for Your MOOG 771-174 Maintenance
Request pricing, availability, and turnaround for your MOOG 771-174. NC Servo provides independent repair with a 1-year warranty. Contact us to set up your repair.
NC Servo 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.