Key Details

We handle a wide range of MOOG D635-611A units. Each one receives inspection, internal cleaning, and reconditioning before it ships.

Independent Repair Facility

Unlike OEM shops, we use our own inventory to handle most rebuilds. That cuts down on lead time and gets your unit back faster.

Specializing in MOOG D635-611A servo valve technology for over five decades

Frequently Asked Questions

It depends on the unit and scope of work. We provide an estimated timeline after initial evaluation.

Not required, but removing excess oil or loose debris before packing helps keep things clean in transit.

If a unit is beyond repair, we explain why and can discuss replacement or exchange options.

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

Send it in for evaluation. We’ll inspect it and give you a repair-vs-replace recommendation based on the actual condition of the unit.

How We Rebuild This Valve

We disassemble every valve, inspect it inside and out, and clean all moving parts. Components that fail inspection are swapped out before the valve is rebuilt and tested.

  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.
  • Final Performance Verification: After reassembly, each valve undergoes bench-testing against published performance specs.
  • Teardown: Every valve is disassembled for internal inspection.

Hydraulic Testing Process

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 performance testing verifies proper functionality.

Repair, Rebuild and Exchange Options

Beyond standard sales, we offer specialized repairs for your MOOG D635-611A unit. Our overhaul process includes internal inspection and disassembly, using only new replacement components.

Lead Times and Support

As a specialist for MOOG D635-611A services, NC Servo Tech targets quick resolution with typical lead times of 1 to 3 weeks. Benefit from our direct access to our technicians to keep your systems running smoothly.

Maintenance Tips

  • Check valve alignment carefully to prevent undue stress on internal components.
  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.
  • Check system pressure regularly to verify it stays within the MOOG D635-611A rated operating range.

Get an Expert Repair for Your MOOG D635-611A

Request pricing, availability, and turnaround for your MOOG D635-611A. NC Servo Tech provides hands-on repair with a 1-year warranty. Contact us to request 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.