Inspection and Repair Process

Each MOOG G631-3703B undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

About Our Shop

We’ve built our shop around one thing: industrial repair. With decades of hands-on experience and deep product knowledge, we deliver consistent results.

Factory-level test stands dedicated to MOOG G631-3703B performance verification

Frequently Asked Questions

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

Yes. If the unit can’t be repaired, we contact you with options before doing anything further.

We give you a straight assessment after inspection. If repair doesn’t make sense, we’ll let you know and discuss alternatives.

All repairs come with a one-year warranty. Contact us for specifics on your unit.

Yes. Photos of the nameplate and overall unit let us begin identification before it arrives, which speeds up the process.

Rebuild Steps

The repair process for the MOOG G631-3703B includes disassembly, diagnostic review, and replacement of failed seals, spools, or other elements. Final assembly includes leak and function testing.

  • 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.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.

Hydraulic Testing Process

NC Servo operates over a dozen dedicated flow test stands, including setups for proportional and servo valves. Every valve goes through performance and leak testing using a range of hydraulic fluids like Skydrol and MIL-5606. Our performance testing verifies consistent performance.

Industries We Serve

Our trusted repair services for the MOOG G631-3703B are trusted across various sectors including Construction, Marine, and Plastics & Injection Molding. 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 G631-3703B unit. Our overhaul process includes disassembly and bench testing, using only new replacement components.

Lead Times and Support

As a specialist for MOOG G631-3703B services, NC Servo 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.

In-House Inventory for MOOG G631-3703B

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

Data Sheets & Reports

For transparent insights into your MOOG G631-3703B, we can provide access to repair records and service logs. This transparency offers you record-keeping and aids in long-term maintenance planning.

Maintenance Tips

  • Schedule preventive maintenance intervals based on duty cycle, not just calendar time.
  • Document all maintenance activities to track performance trends over time.
  • Monitor operating temperatures to identify potential issues before failure occurs.

Let Us Repair Your MOOG G631-3703B

Request pricing, availability, and turnaround for your MOOG G631-3703B. NC Servo provides independent repair with a 1-year warranty. Contact us to request your repair.

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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.