Overview

At NC Servo, our shop is equipped to service the MOOG D633-178B. We use a consistent process to restore each unit to working condition.

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.

Frequently Asked Questions

We confirm next steps with you if a unit can’t be rebuilt. No work proceeds without your approval.

Yes. Our repairs include a 12-month warranty on parts and labor covering parts and labor.

We recommend sending pictures, especially if the model number is unclear or there is visible damage.

We can often prioritize urgent jobs. Note it on your request form and we’ll let you know what’s possible.

Turnaround time varies by model and condition. Contact us for a timeline specific to your unit.

How We Rebuild This Valve

Once a valve arrives, we tear it down fully, examine key surfaces, and replace worn or damaged parts using components we stock in-house, cutting out OEM lead times.

  • 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.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.

Diagnostic Testing

NC Servo 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 functional testing verifies consistent performance.

Common Applications

Our trusted repair services for the MOOG D633-178B are trusted across various sectors including Construction, Aerospace, and Plastics & Injection Molding. We understand the unique demands of valves in these environments.

In-House Inventory for MOOG D633-178B

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.

Maintenance Tips

  • Monitor operating temperatures to identify potential issues before failure occurs.
  • Document all maintenance activities to track performance trends over time.
  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.

Request a Quote for Your MOOG D633-178B Maintenance

Request pricing, availability, and turnaround for your MOOG D633-178B. NC Servo provides warrantied repair with a 1-year warranty. Contact us to set up your repair.

Request a Quote View All MOOG Products Shop MOOG Inventory

NC Servo 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.