About This Unit

We’ve serviced hundreds of REXROTH 4WRTE-42/M units over the years. Each one goes through the same controlled teardown, parts replacement, and testing process.

Inspection and Repair Process

Our repair process for the REXROTH 4WRTE-42/M begins with teardown and ultrasonic cleaning to assess all components.

Frequently Asked Questions

Yes. If the unit can’t be repaired, we contact you with options before doing anything further.

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

In most cases, repair costs less than replacement, especially for legacy or OEM-specific models. We evaluate every unit and let you know what makes sense.

Expedited options are available depending on current scheduling. Contact us to discuss your timeline.

You can send it as-is. We handle all cleaning and preparation as part of our standard process.

About Our Shop

NC Servo specializes in both valves and electronic controls, which lets us operate without the delays of OEM service centers.

Specializing in REXROTH 4WRTE-42/M servo valve technology for over five decades

Rebuild Steps

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.

  • 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.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.

Testing and Bench Verification

With our 13-stand test facility and a Hagenbush proportional valve system, we verify flow curves, hysteresis, frequency response, and more. Performance reports and graphs are available for purchase on request. Our performance testing verifies consistent performance.

Repair, Rebuild and Exchange Options

Beyond standard maintenance, we offer specialized repairs for your REXROTH 4WRTE-42/M unit. Our teardown process includes pressure testing and internal inspection, using only new replacement components.

Parts and Inventory

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.

Data Sheets & Reports

For detailed insights into your REXROTH 4WRTE-42/M, 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

  • Check valve alignment carefully to prevent undue stress on internal components.
  • Schedule preventive maintenance intervals based on duty cycle, not just calendar time.
  • Store spare REXROTH 4WRTE-42/M valves in a clean, dry environment to prevent corrosion and contamination.

Get an Expert Repair for Your REXROTH 4WRTE-42/M

Request pricing, availability, and turnaround for your REXROTH 4WRTE-42/M. NC Servo provides independent repair with a 1-year warranty. Contact us to set up your repair.

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