Repair Procedure

Our repair process for the PARKER UNKOWN begins with teardown and mineral bath cleaning to assess all components.

About Our Shop

We’ve built our shop around one thing: industrial repair. With decades of hands-on experience and deep product knowledge, we deliver consistent results.

Specializing in PARKER UNKOWN servo valve technology for over five decades

Frequently Asked Questions

You’ll hear from us either way. If it’s not repairable, we’ll return the unit and provide our findings.

We regularly work on units with missing labels. Send us a few images and any visible part numbers, and we can usually match it.

Rush and priority service options exist. Availability depends on current workload, so contact us early.

Yes. Photos of the nameplate and overall unit let us begin identification before it arrives, which speeds up the process.

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

Disassembly and Rebuild Procedure

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

  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
  • 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.
  • Final Performance Verification: After reassembly, each valve undergoes bench-testing against published performance specs.

Leak and Performance Testing

NC Servo Tech operates our 13-stand test facility, including setups for proportional and servo valves. Every valve goes through performance and leak testing using industry-standard fluids including MIL-5606 and Skydrol. Our operational testing verifies proper functionality.

Technical Specifications

Every PARKER UNKOWN we service is tested under real-world conditions. Our diagnostics verify performance against published specifications. Performance data and Technical diagrams are available for purchase upon request.

Additional PARKER UNKOWN Services

Beyond standard refurbishment, we offer specialized reconditioning for your PARKER UNKOWN unit. Our overhaul process includes mineral bath cleaning and leak testing, using only replacement replacement components.

Lead Times and Support

As a focused repair facility for PARKER UNKOWN services, NC Servo Tech targets quick resolution with typical lead times of 1 to 3 weeks. Benefit from our direct access to our technicians to keep your systems running smoothly.

Maintenance Tips

  • Document all maintenance activities to track performance trends over time.
  • Inspect PARKER UNKOWN seals regularly to prevent leaks and maintain performance.
  • Check system pressure regularly to verify it stays within the PARKER UNKOWN rated operating range.

Schedule Your PARKER UNKOWN Service Today

Request pricing, availability, and turnaround for your PARKER UNKOWN. NC Servo Tech provides warrantied repair with a 1-year warranty. Contact us to start your repair.

Request a Quote View All PARKER Products Shop PARKER Inventory

NC Servo Tech is an independent third-party repair facility. We are not affiliated with, endorsed by, sponsored by, or authorized by PARKER or any original equipment manufacturer (OEM), nor do we claim to be a PARKER 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.