Independent third-party repair of servo valves and electronic control display assemblies used on military vehicles: active suspension, remote weapon stations, turret traverse, and engineering vehicles. Hydraulic bodies are commercial Moog, Parker, and Rexroth; control panels are customer-supplied OEM display assemblies serviced at the bench-electrical level only.
The servo valves on tactical and combat vehicles are commercial Moog, Parker, and Rexroth bodies. Below are the four common contexts seen at the bench.
N110
Active suspension
Proportional servo valves on chassis stabilization across rough cross-country movement. Common on wheeled armored and modern IFV platforms.
N120
Remote weapon stations
Servo valves on RWS hydraulics for stabilization and aim-point control on roof-mounted weapon stations.
N130
Engineering vehicles
Hydraulic control valves on combat engineering vehicles, bridge layers, and recovery vehicles. High-flow, high-pressure service.
N140
Tracked-vehicle systems
Servo valves on transmission hydraulics and self-propelled artillery positioning systems on tracked platforms.
Each unit is opened, inspected, and rebuilt at the component level. Failed parts come from inventory or off donor units. Bench verification before ship.
N210
Pilot stage rebuild
Torque motor pilot stages, nozzle flapper, and pilot trim cleaned and aligned against documented procedures.
N220
Spool & sleeve service
Spool wear, contamination scoring, and lap restoration on Moog Type 30 Defense, Moog 760, and Parker D1FP bodies.
N230
Coil & feedback work
Burned coil rebuild, feedback wire repair, and LVDT verification on closed-loop suspension and weapon-station bodies.
N240
Bench testing
Hagenbusch and older-style hydraulic stands. Step response, hysteresis, and null shift data available for purchase.
N250
Donor parts service
Stock is hit or miss, but legacy hardware shows up often enough that we can pull from past jobs when we have a match. Ask about a specific part number.
N260
Control panel work
Customer-supplied operator display panels. Bench inspection of indicator lamps, toggle and protected-cover switches, internal wiring, and military-style circular connectors.
N270
Repair scope
Bench-level component work on the hardware. Vehicle qualification, depot processes, and ITAR-controlled handling stay with the customer or contractor.
Tactical-vehicle servo valves run in dust, vibration, and wide temperature swings. Failures fall into four categories. Recognize one? A part number is enough to start.
Torque motor coil burnout, nozzle plugging from contamination, and null shift after long field service. Drives suspension wander or RWS aim drift.
Spool and body
Spool wear, contamination scoring, sticky spool action, and internal leakage past the spool.
Coil and feedback
Burned drive coils, feedback wire wear from vibration, and LVDT signal drift on closed-loop bodies.
Connector and electrical
Damaged connectors, water ingress at connector boots, and contamination on connector pins after extended deployment.
N500 Workflow
From part number to ship-back
Same four-step path through the shop whether the unit came off a depot rebuild line or a maintenance pull from a tactical or armored vehicle.
N510
Get in touch
Call or email with the part number, equipment context, and a photo of the nameplate if it helps.
N520
Bench review
Tech opens the unit, inspects pilot and spool, and runs it on the hydraulic stand to confirm what failed.
N530
Cost & approval
We call back with the cost and a rough turnaround. Nothing is started without your sign-off.
N540
Repair, test, ship
Failed components replaced from inventory or off donors, the valve verified under pressure, and shipped back.
N600 Common questions
Common questions about military vehicle valve repair
Application-specific questions. For brand-specific FAQs, see the dedicated brand page above.
What types of military vehicle servo valves do you repair?
Commercial servo valves and proportional valves used across military-vehicle hydraulics: active suspension, remote weapon stations, turret traverse, engineering-vehicle controls, and tracked-vehicle transmission hydraulics. Bodies are commercial Moog, Parker, and Rexroth components.
Which platforms come through the bench?
Servo valves come through from tracked and wheeled military vehicle hydraulics — we identify and repair by valve manufacturer markings, not by platform. Units arrive from armored, engineering, and other tracked or wheeled military platforms. NC Servo is independent and not affiliated with any defense contractor or vehicle OEM.
Do you handle ITAR or classified work?
No. The servo valves on these platforms are commercial hydraulic components. Bench-level component repair stays on the valve hardware. ITAR-controlled handling, security clearances, and classified processing remain with the customer or contractor.
Do you repair active-suspension proportional valves?
Yes. Proportional servo valves on chassis stabilization come through the bench for spool, sleeve, pilot, and coil work. Bench verification before ship.
Do you provide on-site service?
No. Bench repair is the standard service: ship the valve to Westland, MI for rebuild and testing, then reinstall after return.
How long does a repair usually take?
Lead time varies job to job, partly because parts are often pulled from donor boards. Give us a call with the part number and the situation.
What is the warranty?
One year on parts and workmanship for repairs and rebuilt units. Standard exclusions apply for contamination, improper installation, and out-of-spec operation.
N700 More from NC Servo
Related repair coverage
Other military pages and the brand pages most-tied to military-vehicle hydraulics.
Vehicle valve or control panel down? Send a part number
Give us a call or send a part number with the platform and the symptom. 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.
