About This Unit

We handle a wide range of REXROTH 4WRDU16-51/M units. Each one receives inspection, internal cleaning, and reconditioning before it ships.

Experience and Warranty

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

Specializing in REXROTH 4WRDU16-51/M servo valve technology for over five decades

Frequently Asked Questions

Warranty coverage of a 12-month warranty on parts and labor is included with every repair we complete.

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

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

Inspection and root-cause analysis are part of our standard process. We identify the issue before starting any repair work.

Even if the tag is worn off, we can often match the unit based on shape, size, and internal configuration.

How We Rebuild This Valve

Our team disassembles each valve to assess internal wear. After ultrasonic cleaning, we install replacements and reassemble and verify operation.

  • Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
  • Complete Disassembly: The unit is disassembled and all parts are laid out for individual inspection.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.

Leak and Performance Testing

We carry out full diagnostics on every valve, including flow gain, leakage, pressure shift, and frequency testing. Our test facility supports performance logging and report generation. Our pre-shipment testing verifies spec-level operation.

Additional REXROTH 4WRDU16-51/M Services

Beyond standard maintenance, we offer specialized repairs for your REXROTH 4WRDU16-51/M unit. Our teardown process includes disassembly and flow verification, using only new replacement components.

In-House Inventory for REXROTH 4WRDU16-51/M

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 4WRDU16-51/M, we can provide access to service logs and reports. This transparency offers you compliance assurance and aids in long-term maintenance planning.

Maintenance Tips

  • Use only manufacturer-recommended hydraulic fluids to protect internal valve surfaces.
  • Inspect REXROTH 4WRDU16-51/M seals regularly to prevent leaks and maintain performance.
  • Replace inline filters according to maintenance schedules to maintain proper flow rates.

Get an Expert Repair for Your REXROTH 4WRDU16-51/M

Request pricing, availability, and turnaround for your REXROTH 4WRDU16-51/M. NC Servo provides hands-on repair with a 1-year warranty. Contact us to start 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.