Inspection and Repair Process

Our process involves a teardown of your MOOG D633-371A, mineral bath cleaning, and reassembly with quality parts to restore operation.

Overview

We handle a wide range of MOOG D633-371A units. Each one receives inspection, internal cleaning, and reconditioning before it ships.

Frequently Asked Questions

Yes. Send us photos of the unit from multiple angles. Our team has serviced thousands of models and can often ID them visually.

No cleaning required. Our repair process includes disassembly and cleaning of all components.

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

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

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.

About Our Shop

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

One-year warranty on all MOOG D633-371A valve repairs

How We Rebuild This Valve

We rebuild every valve from the inside out: cleaning, inspection, parts replacement, reassembly, and bench testing.

  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
  • Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.

Diagnostic Testing

NC Servo Technology 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 pre-shipment testing verifies consistent performance.

Common Applications

Our reliable repair services for the MOOG D633-371A are trusted across various sectors including Industrial Machinery, Paper & Pulp, and Steel & Metals. We understand the unique demands of valves in these environments.

In-House Inventory for MOOG D633-371A

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 D633-371A rated operating range.
  • Perform fluid analysis to detect contamination early and prevent system damage.
  • Flush the hydraulic system after any major repair to remove debris before reinstalling the MOOG D633-371A.

Get a Free Evaluation for Your MOOG D633-371A

Request pricing, availability, and turnaround for your MOOG D633-371A. NC Servo Technology provides warrantied repair with a 1-year warranty. Contact us to schedule 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.