Inspection and Repair Process

We specialize in the overhaul of your MOOG D631-346C-4, including the replacement of all necessary gaskets and worn components.

Why Repair With NC Servo

As a specialized repair facility, we have dedicated test equipment that general-purpose shops don’t. That means your MOOG D631-346C-4 gets serviced by people who work on these units regularly.

50+ years of expertise in MOOG D631-346C-4 Valve Repair

Frequently Asked Questions

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

Even if the tag is worn off, we can often match the unit based on shape, size, and internal configuration.

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

Part of our intake includes troubleshooting to determine the failure point. We report findings before proceeding.

Expedited options are available depending on current scheduling. Contact us to discuss your timeline.

Disassembly and Rebuild Procedure

The repair process for the MOOG D631-346C-4 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.
  • Teardown: Every valve is disassembled for internal inspection.
  • 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.

Hydraulic Testing Process

NC Servo Technology operates thirteen in-house test stands, including setups for proportional and servo valves. Every valve goes through performance and leak testing using standard test fluids to match your operational needs. Our performance testing verifies proper functionality.

Where the MOOG D631-346C-4 Is Used

Our trusted repair services for the MOOG D631-346C-4 are trusted across various sectors including Construction, Automotive, and Paper & Pulp. We understand the unique demands of valves in these environments.

Turnaround and Shipping

As a dedicated source for MOOG D631-346C-4 services, NC Servo Technology targets quick resolution with typical lead times of 1 to 2 weeks. Benefit from our responsive technical support to keep your systems running smoothly.

In-House Inventory for MOOG D631-346C-4

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

  • Check system pressure regularly to verify it stays within the MOOG D631-346C-4 rated operating range.
  • Monitor operating temperatures to identify potential issues before failure occurs.
  • Schedule preventive maintenance intervals based on duty cycle, not just calendar time.

Request a Quote for Your MOOG D631-346C-4 Maintenance

Request pricing, availability, and turnaround for your MOOG D631-346C-4. NC Servo Technology provides independent repair with a 1-year warranty. Contact us to set up your repair.

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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.