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 on Moog D661 / D662 valves.
N220
Spool & sleeve service
Spool wear, contamination scoring, and lap restoration on high-tonnage UBE valve bodies.
N230
Coil & feedback work
Burned coil rebuild, feedback wire repair, and LVDT verification on closed-loop bodies.
N240
Bench testing
Hagenbusch and older-style hydraulic stands. Hysteresis, null shift, and step response data available for purchase.
N250
Donor parts service
Aftermarket and donor parts for legacy UBE valves on older platforms.
N260
Repair scope
Bench-level component work on the valve hardware. PLC programming, machine parameter setup, and integration stay with the customer.
High-tonnage service stresses spools and seals on Moog D661 / D662 servo bodies. Wear and seal degradation drive internal leakage.
Internal leakage
Internal leakage past the spool on aged Rexroth and Yuken bodies after years of cycling.
Slow valve response
Contamination buildup and coil degradation slow valve switching. Common on aged proportional bodies.
Feedback signal loss
LVDT or position feedback faults on closed-loop servo bodies.
N500 Workflow
From part number to ship-back
Same four-step path through the shop whether the unit came off a UBE MD or a UBEMAX ultra-large tonnage press.
N510
Get in touch
Call or email with the part number, machine model, 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 UBE valve repair
Application-specific questions. For brand-specific FAQs, see the dedicated brand page above.
What servo valve brands come off UBE machines?
UBE MD, UB, UBEMAX, and MD-i platforms typically run Moog D661 / D662 servo valves, Bosch Rexroth 4WRPEH / 4WRSE proportional valves, and Yuken DSHG proportional valves. All come off the bench for rebuild.
Can you repair valves from large-tonnage UBEMAX machines?
Yes. UBEMAX machines run multi-pump hydraulic systems with Moog servo valves at very high shot volumes. The valves come through the bench for full rebuild.
What about Yuken DSHG proportional valves?
Yes. Yuken DSHG proportional valves on UBE UB-series machines come through the bench. Spool, sleeve, coil, and bench-test work all standard scope.
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.
Do you provide UBE machine programming or software configuration?
No. NC Servo handles bench-level component repair on the valve hardware only. PLC programming, machine parameter setup, and integration stay with the customer or OEM.
What if the valve is beyond economic repair?
If the valve is not fixable, we will let you know and help source a replacement.
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 injection-molding pages and the brand pages most-tied to UBE hydraulics.
Give us a call or send a part number with the machine model 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.
