Pilot stage rebuild
Torque motor pilot stages, nozzle flapper, and pilot trim cleaned and aligned against documented procedures on Moog D661 / D662 valves.
UBE Servo Valve Repair
Independent third-party component-level repair of servo and proportional valves on UBE injection molding machines: MD five-point toggle, UB hydraulic toggle, UBEMAX ultra-large tonnage, and MD-i servo-hydraulic. Moog D661 / D662, Rexroth 4WRPEH / 4WRSE, and Yuken DSHG bodies come through the bench.
Where These Valves Sit
Four UBE machine contexts
UBE machines are built for large-tonnage production. Below are the four common platforms seen at the bench.
01
UBE MD series
MD850 through MD4000 (850-4,000 metric tons). Moog D661 / D662 servo valves and Rexroth 4WRPEH / 4WRSE proportional valves come off these for rebuild.
02
UBE UB series
UB1300 through UB2500 (1,300-2,500 metric tons). Yuken DSHG proportional valves and Rexroth proportional bodies come through routinely.
03
UBE UBEMAX series
4,000 to 6,500+ metric tons. Moog servo valves come off these ultra-large tonnage machines for rebuild.
04
UBE MD-i series
Updated generation with servo-driven hydraulic pumps. Bosch Rexroth and Moog proportional / servo valves come through.
What NC Servo Does
Component-level repair on UBE valves
Each unit is opened, inspected, and rebuilt at the component level. Failed parts come from inventory or off donor units. Bench verification before ship.
Spool & sleeve service
Spool wear, contamination scoring, and lap restoration on high-tonnage UBE valve bodies.
Coil & feedback work
Burned coil rebuild, feedback wire repair, and LVDT verification on closed-loop bodies.
Bench testing
Hagen-Busch and older-style hydraulic stands. Hysteresis, null shift, and step response data on request.
Donor parts service
Aftermarket and donor parts for legacy UBE valves on older platforms.
Repair scope
Bench-level component work on the valve hardware. PLC programming, machine parameter setup, and integration stay with the customer.
Brands
UBE servo valve brands
Top brands seen on UBE hydraulics. Click through for the dedicated brand page.
Common Faults
What usually shows up on UBE valves
Common failure modes seen on UBE valves at the bench.
| Spool wear & seals | 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. |
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.
- 01
Get in touch
Call or email with the part number, machine model, and a photo of the nameplate if it helps.
- 02
Bench review
Tech opens the unit, inspects pilot and spool, and runs it on the hydraulic stand to confirm what failed.
- 03
Cost & approval
We call back with the cost and a rough turnaround. Nothing is started without your sign-off.
- 04
Repair, test, ship
Failed components replaced from inventory or off donors, the valve verified under pressure, and shipped back.
FAQ
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.
More from NC Servo
Related repair coverage
Other injection-molding pages and the brand pages most-tied to UBE hydraulics.
IMM hub
All injection molding builders we cover, plus shared hydraulics context.
Toshiba
Other Japanese IMM coverage with similar Moog and Rexroth hardware.
Nagata
Other Japanese IMM hydraulic coverage.
Moog brand page
Moog D661, D662, and broader Moog servo valve hardware.
Yuken brand page
Yuken DSHG and broader Yuken proportional valve coverage.
Valve repair hub
Full directory of 20+ valve brands.
What is a servo valve?
Plain-English explainer on electrohydraulic servo valves and how they relate to proportional hardware.
What is a proportional valve?
How proportional and servoproportional valves differ from true servo valves, and what gets done at the bench.
UBE valve down? Send a part number
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.