MOOG 78-139C
Need your MOOG 78-139C repaired right the first time? With 50+ years of hydraulic experience and 17,000+ units in stock, we have the parts and the know-how.
Representative image — actual product may differ
Inspection and Repair Process
We specialize in the overhaul of your MOOG 78-139C, including the replacement of all necessary gaskets and worn components.
Why Repair With NC Servo
Our technicians work on industrial components like the MOOG 78-139C daily. That hands-on repetition builds the kind of experience that speeds up diagnosis and reduces rework.
50+ years of expertise in MOOG 78-139C Valve Repair
Frequently Asked Questions
Expedited options are available depending on current scheduling. Contact us to discuss your timeline.
Send the unit in whatever condition it’s in. We clean everything during teardown before inspection begins.
Yes. Send us photos of the unit from multiple angles. Our team has serviced thousands of models and can often ID them visually.
Yes. Photos of the nameplate and overall unit let us begin identification before it arrives, which speeds up the process.
Most repairs are completed within 1 to 3 weeks, depending on workload and parts availability.
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.
- In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
- Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.
- Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
- Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
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 operational testing verifies consistent performance.
Performance Data
Every MOOG 78-139C we service is tested under operating environments. Our diagnostics verify performance against published specifications. Performance data and Cycle life data are available for purchase upon request.
Turnaround and Shipping
As a specialist for MOOG 78-139C services, NC Servo Technology targets quick resolution with typical lead times of 1 to 2 weeks. Benefit from our direct access to our technicians to keep your systems running smoothly.
Product Data Available
For detailed insights into your MOOG 78-139C, we can provide access to repair records and reports. This transparency offers you compliance assurance and aids in long-term maintenance planning.
Maintenance Tips
- Monitor operating temperatures to identify potential issues before failure occurs.
- Document all maintenance activities to track performance trends over time.
- Check system pressure regularly to verify it stays within the MOOG 78-139C rated operating range.
Let Us Repair Your MOOG 78-139C
Request pricing, availability, and turnaround for your MOOG 78-139C. NC Servo Technology provides hands-on repair with a 1-year warranty. Contact us to start your repair.
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.