About This Unit

The MOOG D633-317B is one of many models we routinely service. Our process includes disassembly, cleaning, and reassembly using reliable components.

Why Repair With NC Servo

We stock common wear parts in-house, so most rebuilds don’t require outside sourcing. Less waiting, faster turnaround.

One-year warranty on all MOOG D633-317B valve repairs

Frequently Asked Questions

Yes. We diagnose first, then provide a repair recommendation with our findings. No work begins without your approval.

Helpful but not required. If you can photograph the label, connectors, and overall unit, it gives our team a head start.

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

Send the unit in whatever condition it’s in. We clean everything during teardown before inspection begins.

Warranty coverage of a 12-month warranty on parts and labor is included with every repair we complete.

How We Rebuild This Valve

The process begins with disassembly and visual evaluation. We then clean, replace worn pieces, and reassemble the valve to restore its function.

  • Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • 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.

Testing and Bench Verification

We carry out full diagnostics on every valve, including flow gain, leakage, pressure shift, and frequency testing. Our test facility supports performance logging and report generation. Our functional testing verifies proper functionality.

Technical Specifications

Every MOOG D633-317B we service is tested under real-world conditions. Our diagnostics verify performance against published specifications. Cycle life data and Technical diagrams are available for purchase upon request.

Repair, Rebuild and Exchange Options

Beyond standard refurbishment, we offer specialized reconditioning for your MOOG D633-317B unit. Our overhaul process includes flow verification and bench testing, using only new replacement components.

Maintenance Tips

  • Use only manufacturer-recommended hydraulic fluids to protect internal valve surfaces.
  • Inspect MOOG D633-317B seals regularly to prevent leaks and maintain performance.
  • Perform fluid analysis to detect contamination early and prevent system damage.

Get a Free Evaluation for Your MOOG D633-317B

Request pricing, availability, and turnaround for your MOOG D633-317B. NC Servo Tech provides hands-on repair with a 1-year warranty. Contact us to set up your repair.

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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.