• 38422 Webb Dr Westland , MI 48185
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% O1975 · NC Servo Technology Servo & Proportional Valve Repair Westland, Michigan · Est. 1975

Servo Valve & Proportional Valve Repair Specialists

Independent repair facility for servo valves, proportional valves, servo drives, and industrial electronic controls — since 1975.

Send a part number and get lead time and pricing back, typically within one business day. If the OEM discontinued it, we probably still repair it.

Request a Quote Call 734-326-6666
Eddie Harmon of NC Servo Technology testing a proportional valve on the Hagenbusch test stand
Fig. 01 — Eddie Harmon on the Hagenbusch proportional stand, Westland MI
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Years in Operation
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Parts in Stock
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Test Stands
24hr
Rush Available

N100 What we do

Industrial valve & electronic
repair, done right

Repair, rebuild, and testing for servo valves, proportional valves, servo drives, and amplifiers — standard or expedited turnaround.

All services
Fig. 02 / Valves Technician performing hydraulic valve repair on an industrial servo valve

Servo & Proportional Valve Repair

Expert hydraulic valve repair, rebuild, and exchange. We support discontinued and hard-to-find models most shops can't handle.

Explore valve services
Fig. 03 / Electronics Circuit board of an industrial servo drive under repair

Servo Drive & Amplifier Repair

Servo drives, controllers, and servo amplifiers serviced to OEM standards or better — with CANbus, PROFIBUS, and EtherCAT support.

Explore drive services
Fig. 04 / Custom Electronics testing station used for custom repair solutions

Custom & Legacy Solutions

Retrofitting, system design, and engineering consultation for non-standard applications and legacy hydraulic system upgrades.

Discover custom work

N200 How it works

Your valve, step by step

Every unit follows the same documented path through our Westland facility — one program, six blocks.

N210

Receive

Ship us your unit with a part number. We log it and confirm receipt.

N220

Diagnose

Teardown and failure analysis. For digital valves, we extract and store the onboard program first.

N230

Quote

Lead time and pricing, typically within one business day. No work without your approval.

N240

Repair

Rebuild with OEM, aftermarket, or refurbished parts per your requirements.

N250

Bench-Test

Tested on one of 13 stands with DTE Lite, MIL-5606, or Skydrol. Graphs available for purchase.

N260

Ship

Digital parameters reloaded and verified. Unit arrives ready to install.

N050 Find your part

Start with your part number

Search 19,000+ parts in stock — or send the number for a quote: repair it, buy it, or we find it.

Parts search · MDI ● Ready

Search 19,000+ parts in stock

Popular:

Can’t find it? We repair, sell, and source hard-to-find units — use the quote form →

N250 Live from the bench

Real data, not stock charts

An actual test run from our bench — a Rexroth 4WRKE25 proportional valve. Switch tests, hover the trace: every point is measured. Graphs like these are available for purchase with your repair.

N300 Why NC Servo

Five decades of
hands-on repair

Independent of all OEMs — no affiliation, no agenda. Objective valve and drive repair backed by 50 years of experience.

  • N310

    Advanced In-House Testing

    13 dedicated test stands including a Hagenbusch Proportional Test Stand — no outsourced verification.

  • N320

    Transparent, Documented Results

    Every repaired valve is bench-tested before shipment. Performance graphs and detailed failure reports available for purchase.

  • N330

    We Fix What the OEM Won't

    We stock inventory for discontinued valves and have serviced obsolete models for decades.

  • N340

    Our Own Warranty

    All warranties are issued solely by NC Servo Technology and apply to every repair we perform.

Facility capabilities
Test stands13 in-house, incl. Hagenbusch Proportional Test Stand
Test fluidsMobil DTE Lite · MIL-5606 · Skydrol
Digital protocolsCANbus · PROFIBUS · EtherCAT — program extract & reload
ComponentsServo valves · proportional valves · servo drives · amplifiers · controllers
Brands serviced40+ manufacturers, incl. discontinued lines
TurnaroundStandard · expedited · 24-hour rush
Since1975 — Westland, Michigan
Get Expert Advice

N400 See us in action

Advanced digital
protocol servicing

Valves with onboard electronics running CANbus, PROFIBUS, or EtherCAT protocols require specialized handling. We have the equipment and the experience to service them.

Before any repair, we extract and store the valve's program. After repair, the original parameters are reloaded and verified — the unit ships ready to install.

NC Servo Technology facility overview video preview

N500 In stock & ready

Browse our full inventory

Over 19,000 servo valves, proportional valves, and electronic controls in stock and ready to ship.

Shelves of industrial valves and electronic controls in stock

All Inventory

19,000+ valves and electronic controls

Browse all
Servo and proportional valves ready to ship

Valves

Moog, Rexroth, Parker and more — rebuilt and ready

View valves
Rack of servo drives and electronic control modules

Electronic Controls

Servo drives, amplifiers, and industrial electronics

View electronics

N600 Who we service

Brands we repair

Independent third-party repair for 40+ manufacturers — including discontinued lines the OEM no longer supports.

Servo & Proportional Valves

Moog Bosch Rexroth Rexroth Vickers Parker Atos Bosch Eaton Denison Abex Atchley CEI Duplomatic HR Textron Hydronorma Oilgear Yuken Van Dorn ASCO MTS Kawasaki Continental Star Sundstrand Tokimec Joucomatic Hydrolux Dynamic

Servo Drives & Electronic Controls

Allen-Bradley Fanuc Indramat Kollmorgen ABB Toshiba Siemens Yaskawa Mitsubishi Emerson Aerotech Electro-Craft Glentek Heldt & Rossi Pacific Scientific Ametek Animatics Delta

N700 Customer reviews

What our clients say

★★★★★

"I've been in industrial hydraulic field service for 30 years. The owner took me through the entire operation, introduced me to his techs and spent over an hour with me. This is an American gem!"

Tom Neighbors

★★★★★

"Great experience with NC Servo. I asked for the impossible on a 1 day turnaround and somehow they did it. Friendly and fast. Great experience with all members of the staff."

Larry Voss

★★★★★

"Missy is an expert in her field. Very friendly and knowledgeable with brilliant turn around times. Overall experience with NC Servo has been stellar."

Heather Gillespie

★★★★★

"Thank you to NC Servo and Missy! We greatly appreciate the Service, Quality and Turnaround. We look forward to working with you in the future."

Pamela Fay

★★★★★

"I have been dealing with these guys for Servos (both new and repaired) for years with no issues."

Earl Steenburg

★★★★★

"Great communication and quick delivery! Item as described, packed well, and arrived on time."

eBay Customer

N800 Technical resources

From our repair bench

Practical guides written by the people who test and repair these components every day.

All resources
Ref. 01 — Decision guide

Repair vs. Replace: What to Do With a Failing Servo Valve

Read the guide Ref. 02 — Troubleshooting

Common Servo Valve Failure Causes — and How to Prevent Them

Read the guide Ref. 03 — Step-by-step

How to Test a Servo Valve: A Practical Guide

Read the guide

N900 Common questions

Servo valve repair FAQ

What does the “NC” in NC Servo stand for?
NC stands for numerical control — the programmed machine-tool automation technology that servo valves and servo drives made possible. NC Servo Technology has repaired these components since 1975.
How long does servo valve repair take?
We offer standard, expedited, and 24-hour rush turnaround options. Send your model number and we respond with lead time and pricing, typically within one business day.
Do you repair discontinued or obsolete servo valves?
Yes. Many OEMs discontinue service on older models. We maintain inventory for discontinued valves and have been servicing obsolete models for decades — if the manufacturer no longer supports it, we likely still do.
Is my valve tested before it ships back?
Every repaired valve is bench-tested before shipment on one of our 13 in-house test stands, including a Hagenbusch Proportional Test Stand. Performance graphs and detailed failure reports are available for purchase.
Should I repair or replace a failing servo valve?
It depends on the valve model, availability, and failure mode. Independent repair is often substantially more cost-effective than OEM replacement, especially for discontinued models with extended lead times. See our repair-vs-replace decision guide.
Are you affiliated with Moog, Bosch Rexroth, or other manufacturers?
No. NC Servo Technology is an independent third-party repair facility with no affiliation to any OEM. Brand names on this site are used for identification only. All warranties are our own.
Can you service valves with onboard digital electronics?
Yes. We service valves with integrated electronics running CANbus, PROFIBUS, or EtherCAT protocols. Before repair we extract and store the valve's program; after repair the original parameters are reloaded and verified.

Get Your Quote

Repair it or buy it — send your part number for lead time and pricing.

Quote request · RFQ ● Ready








    N990 Get a quote

    Ready when
    your line isn't.

    Send the form above with your part number — or call. We respond with lead time and pricing, typically within one business day.

    Request a Quote 734-326-6666

    38422 Webb Dr, Westland, MI 48185
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    Important Legal Notice

    Independent Third-Party Repair Facility: NC Servo Technology is an independent repair facility. We are not affiliated with, authorized by, endorsed by, or connected to any original equipment manufacturer (OEM) whose products or brand names appear on this website.

    Trademark Notice: All brand names, trademarks, logos, and part numbers mentioned on this website are used for identification and cross-reference purposes only and remain the property of their respective owners.

    Independent Services: Our repair services are performed independently using our own methods, tools, parts, and expertise. We are not an authorized service center for any manufacturers listed on this website.

    Warranties: All warranties provided are our own and are issued solely by NC Servo Technology. Warranty terms apply only to services performed by NC Servo Technology.

    Parts and Components: Replacement parts may be OEM parts, aftermarket parts, or refurbished components depending on availability and customer requirements.