Repair Services Overview
Independent third-party hydraulic repair services across servo valves, proportional valves, servo drives, and electronic controls. Component-level rebuild, bench testing, donor parts service, and cross-brand sourcing across 30+ brands. NC Servo Technology, Westland, Michigan, working since 1975.
Three Service Pillars
Hydraulic on the valve side. Electronic on the drive side. Donor-parts and exchange on the inventory side. The same techs and the same bench cover all three.
Servo valves, proportional valves, cartridge valves, and directional control bodies rebuilt at the component level.
Servo drives, AC drives, motion controllers, and electronic control boards serviced at the component level.
19,000+ unit donor parts pool. Rebuilt swap-with-discount when a match is on the shelf, cross-brand sourcing when it isn't.
Service Lanes
The shop is structured around the same set of jobs whether the unit is a hydraulic valve, a servo drive, or an electronic control card.
Open the unit, find what failed, replace the individual components. No box-swapping.
13 hydraulic test stands plus an electronics bench. Documented procedures by family.
19,000+ unit pool. Aftermarket and donor parts for hardware the OEM no longer stocks.
Trade in your failed unit for a discount on a rebuilt match if we have one on the shelf.
If your unit is beyond economic repair and not on the shelf, we suggest a comparable cross-brand option that drops in.
In-house spool machining and lap restoration on the hydraulic side; component-level board repair on servo drives, amplifiers, and onboard valve electronics on the drive side.
In the Shop
The shop runs side-by-side hydraulic and electronics benches in Westland, Michigan. Hydraulic units go on a Hagen-Busch or older-style test stand depending on the family. Electronic drives go on the electronics bench under load. The 19,000+ unit parts pool sits on the same floor, so donor parts come off the shelf without a sourcing delay.
Performance graphs and detailed test data are available on request. The shop has worked on this kind of hardware since 1975.
Where We Serve
The same hydraulic and electronic hardware moves between very different machines. The shop has worked across these application contexts since 1975.
Servo and proportional valves on injection, clamp, and ejector circuits.
Servo drives and amplifiers on machining centers, grinders, and tool feeds.
Force-control proportional valves on stamping and forming presses.
Roll-force valves and high-power AC drives on rolling mills.
Jet-pipe servo valves on flight controls, simulators, and turbine governors.
Steam and gas turbine valves, power-generation drives, wind turbine pitch.
Servo drives on filling, capping, web-fed printing, and converting lines.
Hydraulic valves on construction, marine, and mobile equipment.
Workflow
Same four-step path through the shop whether the unit is a discontinued 1970s servo valve, a current proportional with onboard electronics, or a modern servo drive with EtherCAT.
Call or email with the part number, fault code, machine context, or a photo of the nameplate.
Tech opens the unit, inspects internals, and runs it on the appropriate test stand to confirm what failed.
We call back with the cost and a rough turnaround. Nothing is started without your sign-off.
Failed components replaced from inventory or off donors, the unit verified under load or pressure, and shipped back.
FAQ
Service-level questions covering both valve and drive work. For brand-specific FAQs, see the dedicated brand pages or category hubs.
Yes. The shop runs side-by-side hydraulic and electronics benches. Hydraulic valves go on the test stands; electronic drives go on the electronics bench under load. Same techs, same shop, same warranty.
We focus on hydraulic valves and electronic drives. We do not repair hydraulic pumps or rotating-equipment motors. Pump-side work stays with your pump shop or in-house team.
The shop is bench-based; customers ship units in and we ship them back. We do not run an on-site field-service team.
If the unit is not fixable, we will let you know and help source a replacement: a rebuilt match if we have one on the shelf, or a comparable cross-brand alternative.
Most failures are hardware, and the unit comes back working with its program intact. Corrupted programs are rare; if one is already corrupted before the unit reaches us, that's the one thing we can't recover.
Each repaired unit is bench-tested before it ships. Performance graphs and detailed test data are available on request.
One year on parts and workmanship for repairs and rebuilt units. Standard exclusions apply for contamination, improper installation, line-side faults, and out-of-spec operation.
Where to next
The category hubs below cover specific repair coverage with brand directories and deeper content.
Servo and proportional valve repair across 20+ brands. Full brand directory with dedicated pages.
Component-level board work on servo drives, amplifiers, and motion controllers across 12+ brands.
Heavy-industrial valve work on presses, mills, machine tools, and process equipment.
Industry-specific hub for valve and drive repair on injection molding machines.
Plain-language explanation of servo valves: what is inside, common architectures, and what gets done at the bench.
When component-level repair makes sense versus buying new or rebuilt.
Contamination, hardened seals, blown coils, and the most common reasons servo valves fail in industrial service.
How proportional and servoproportional valves differ from true servo valves, plus what gets done at the bench.
Give us a call or send a part number. We'll check the donor pool, suggest a rebuilt match if we have one, and walk through repair or cross-brand options if we don't.
