Valve Overview

We’ve serviced hundreds of MOOG 31S020 units over the years. Each one goes through the same controlled teardown, parts replacement, and testing process.

How We Repair Your Unit

Our repair process for the MOOG 31S020 begins with teardown and mineral bath cleaning to assess all components.

Frequently Asked Questions

Yes. Every unit goes through diagnostic testing and we provide an assessment before moving forward.

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

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

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.

Standard turnaround is 1-3 weeks. Rush options are available for time-sensitive situations.

Experience and Warranty

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

50+ years of expertise in MOOG 31S020 Valve Repair

Rebuild Steps

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.
  • 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.
  • Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.

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 functional testing verifies proper functionality.

In-House Inventory for MOOG 31S020

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

Maintenance Tips

  • Keep a spare MOOG 31S020 on hand to minimize downtime during unplanned failures.
  • Use only manufacturer-recommended hydraulic fluids to protect internal valve surfaces.
  • Flush the hydraulic system after any major repair to remove debris before reinstalling the MOOG 31S020.

Get a Free Evaluation for Your MOOG 31S020

Request pricing, availability, and turnaround for your MOOG 31S020. NC Servo provides hands-on 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.