About This Unit

We handle a wide range of REXROTH 4WRKE25E3-350-21/6A24Z9/D3M units. Each one receives inspection, internal cleaning, and reconditioning before it ships.

Inspection and Repair Process

We specialize in the overhaul of your REXROTH 4WRKE25E3-350-21/6A24Z9/D3M, including the replacement of all necessary gaskets and worn components.

Frequently Asked Questions

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

It depends on the unit and scope of work. We provide an estimated timeline after initial evaluation.

Yes. Our technicians can often identify units based on photos, dimensions, or manufacturer markings. Send a photo before shipping to speed up intake.

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

If the main housing or board is intact, repair is usually the better option. We can restore most units to working condition with tested parts.

Independent Repair Facility

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

One-year warranty on all REXROTH 4WRKE25E3-350-21/6A24Z9/D3M valve repairs

Disassembly and Rebuild Procedure

The process begins with disassembly and visual evaluation. We then clean, replace worn pieces, and reassemble the valve to restore its function.

  • 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.
  • Cleaning: Units go through a mineral bath, with ultrasonic cleaning used for delicate internals.
  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.

Diagnostic Testing

Each REXROTH 4WRKE25E3-350-21/6A24Z9/D3M is tested on a dedicated flow bench before it ships. We check pressure, flow, leakage, and response characteristics against published specifications. Our pre-shipment testing verifies spec-level operation.

Maintenance Tips

  • Replace inline filters according to maintenance schedules to maintain proper flow rates.
  • Store spare REXROTH 4WRKE25E3-350-21/6A24Z9/D3M valves in a clean, dry environment to prevent corrosion and contamination.
  • Inspect REXROTH 4WRKE25E3-350-21/6A24Z9/D3M seals regularly to prevent leaks and maintain performance.

Get a Free Evaluation for Your REXROTH 4WRKE25E3-350-21/6A24Z9/D3M

Request pricing, availability, and turnaround for your REXROTH 4WRKE25E3-350-21/6A24Z9/D3M. NC Servo provides warrantied repair with a 1-year warranty. Contact us to request 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.