Our Approach to Repair

Our comprehensive repair process for the Moog D633-519B begins with a full teardown and ultrasonic cleaning to assess all components.

What Sets Us Apart

As a specialized valve repair shop, we have the dedicated equipment and expertise that general-purpose shops lack, ensuring your component is serviced correctly the first first time.

Specializing in Moog D633-519B servo valve technology for over three decades

Frequently Asked Questions

Service Procedure

The repair process for the Moog D633-519B includes full disassembly, diagnostic review, and replacement of failed seals, spools, or other elements. Final assembly includes leak and function testing.

  • Comprehensive Teardown: Every valve is fully disassembled for a thorough internal inspection.
  • Rigorous Testing: The reassembled unit undergoes rigorous leak and pressure testing to verify it performs to specification.
  • Thorough Decontamination: Every component is put through a deep cleaning process to remove grime and buildup.
  • Meticulous Cleaning: All parts undergo an ultrasonic cleaning process to remove contaminants before inspection.

Diagnostic Evaluation

NC Servo Tech operates over a dozen dedicated flow test stands, including setups specifically 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 operational testing ensures consistent performance.

Maintenance Tips

  • Check valve alignment carefully to prevent undue stress on internal components.
  • Replace inline filters per maintenance schedules.
  • Perform comprehensive fluid analysis to detect contamination early and prevent system damage.

Start Your Moog D633-519B Reconditioning Process

Trust NC Servo Tech for industry-leading service. Contact us today to initiate your repair and get your unit reconditioned.