Inspection and Repair Process

Our repair process for the SUNDSTRAND 157B4228 begins with teardown and ultrasonic cleaning to assess all components.

Experience and Warranty

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

Specializing in SUNDSTRAND 157B4228 servo valve technology for over five decades

Frequently Asked Questions

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

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

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

Yes, our standard 1-year parts and labor warranty is standard on all repairs. Details are provided with your service report.

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

Repair Process

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

  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
  • 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.
  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.

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 functional testing verifies spec-level operation.

SUNDSTRAND 157B4228 Specifications

Every SUNDSTRAND 157B4228 we service is tested under operating environments. Our diagnostics verify performance against published specifications. Specification sheets and Performance data are available for purchase upon request.

Repair, Rebuild and Exchange Options

Beyond standard sales, we offer specialized repairs for your SUNDSTRAND 157B4228 unit. Our disassembly process includes disassembly and seal replacement, using only new replacement components.

Turnaround and Shipping

As a specialist for SUNDSTRAND 157B4228 services, NC Servo targets quick resolution with typical lead times of 2 to 3 weeks. Benefit from our responsive technical support to keep your systems running smoothly.

Maintenance Tips

  • Document all maintenance activities to track performance trends over time.
  • Keep hydraulic fluid clean and at proper levels for consistent valve operation.
  • Store spare SUNDSTRAND 157B4228 valves in a clean, dry environment to prevent corrosion and contamination.

Let Us Repair Your SUNDSTRAND 157B4228

Request pricing, availability, and turnaround for your SUNDSTRAND 157B4228. NC Servo provides hands-on 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 SUNDSTRAND or any original equipment manufacturer (OEM), nor do we claim to be a SUNDSTRAND 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.