About This Unit

At NC Servo, our shop is equipped to service the REXROTH 4WRZ25-E3-325/506A24NEK4/D3M. We use a consistent process to restore each unit to working condition.

Teardown and Rebuild Steps

Each REXROTH 4WRZ25-E3-325/506A24NEK4/D3M undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

Frequently Asked Questions

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

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

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.

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

Part of our intake includes troubleshooting to determine the failure point. We report findings before proceeding.

About Our Shop

Unlike OEM shops, we use our own inventory to handle most rebuilds. That cuts down on lead time and gets your unit back faster.

Factory-level test stands dedicated to REXROTH 4WRZ25-E3-325/506A24NEK4/D3M performance verification

Disassembly and Rebuild Procedure

Each valve goes through teardown to expose wear and buildup. After mineral bath cleaning, we replace damaged parts and reassemble the unit to spec.

  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.

Diagnostic Testing

NC Servo operates thirteen in-house test stands, 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 pre-shipment testing verifies consistent performance.

Documentation on Request

For documented insights into your REXROTH 4WRZ25-E3-325/506A24NEK4/D3M, we can provide access to service logs and repair records. This transparency offers you peace of mind and aids in long-term maintenance planning.

Maintenance Tips

  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.
  • Use only manufacturer-recommended hydraulic fluids to protect internal valve surfaces.
  • Store spare REXROTH 4WRZ25-E3-325/506A24NEK4/D3M valves in a clean, dry environment to prevent corrosion and contamination.

Need Your REXROTH 4WRZ25-E3-325/506A24NEK4/D3M Back Online?

Request pricing, availability, and turnaround for your REXROTH 4WRZ25-E3-325/506A24NEK4/D3M. NC Servo provides independent 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.