Teardown and Rebuild Steps

Our process involves a teardown of your MOOG D633-358B, mineral bath and ultrasonic cleaning, and reassembly with quality parts to restore operation.

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 D633-358B valve repairs

Frequently Asked Questions

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

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

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.

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

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

Repair Process

The repair process for the MOOG D633-358B includes disassembly, diagnostic review, and replacement of failed seals, spools, or other elements. Final assembly includes leak and function testing.

  • Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.

Testing and Bench Verification

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 a range of hydraulic fluids like Skydrol and MIL-5606. Our performance testing verifies proper functionality.

Repair, Rebuild and Exchange Options

Beyond standard maintenance, we offer specialized overhauls for your MOOG D633-358B unit. Our overhaul process includes flow verification and seal replacement, using only new replacement components.

In-House Inventory for MOOG D633-358B

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

Documentation on Request

For documented insights into your MOOG D633-358B, we can provide access to repair records and reports. This transparency offers you peace of mind and aids in long-term maintenance planning.

Maintenance Tips

  • Store spare MOOG D633-358B valves in a clean, dry environment to prevent corrosion and contamination.
  • Inspect MOOG D633-358B seals regularly to prevent leaks and maintain performance.
  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.

Start Your MOOG D633-358B Reconditioning Process

Request pricing, availability, and turnaround for your MOOG D633-358B. NC Servo Technology provides independent repair with a 1-year warranty. Contact us to request 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.