The 101(S)‑5 Series Hydraulic Steering Control Units (SCU) are high‑performance steering actuator valves designed for precision hydraulic steering systems on mobile machinery. These units combine advanced control logic, priority flow features, and robust construction to provide smooth, reliable, and repeatable steering response in demanding applications such as construction equipment, agricultural vehicles, material handling machines, and industrial hydraulics.
The extended suffixes (T)(TE)(L)(E)(TX) denote optional enhancements including torque compensations, electronic feedback, load‑sense logic, energy saving features, and temperature‑compensated designs to tailor performance for specific machine requirements.
| Parameters | Type 101-5T(TX) |
| Displacement(mL/r) | 50 | 63 | 80 | 100 | 125 | 160 | 200 | 250 | 280 | 315 | 400 |
| Max.input speed (rpm) | 100 | 75 |
| Max.input pressure(MPa) | 17.5 |
| Relief Valve Pressure Settinngs(MPa) | 06,07,08,10,12,14,15,16,17.5 |
| Shock Valve Pressure Settinngs(MPa) | 12,13,14,16,18,20,21,22,23.5 |
| Max.cont.back pressure(MPa) | 2.5 |
| Weight(kg) | 5.75 | 5.81 | 5.89 | 5.96 | 6.1 | 6.3 | 6.5 | 6.73 | 6.91 | 7.1 | 7.5 |
| Dimension L(mm) | 130 | 132 | 133 | 136 | 139 | 144 | 149 | 155 | 160 | 165 | 175 |
Note:L is the maximum length dimension of product.This dimension on some products may 2mm or 4mm shorter.
🔹 Key Features
✔ Precision Steering Control
- Converts operator steering input into proportionate hydraulic flow.
- Smooth and consistent steering response with low hysteresis.
✔ Priority Flow Logic
- Ensures steering always receives flow before auxiliary functions in the system.
✔ Flexible Configuration
- Multiple suffix options allow tuning performance for system characteristics: torque assist, electronic feedback, load‑sense, temperature compensation, etc.
✔ Modular Construction
- Compact modular sandwich plate design fits standard ISO 4401 / CETOP mounting patterns.
✔ Robust and Durable
- Designed for heavy industrial use with high operating pressure capability.
✔ Wide Application
- Compatible with closed‑center, open‑center, and load‑sense steering circuits.
🔹 Typical Working Principle
The 101(S)‑5 Series SCU acts as the central steering control element in a hydraulic steering circuit:
- Operator Input: When the operator turns the steering wheel or joystick, the SCU spool is displaced.
- Flow Priority: Internal priority logic sends required oil flow to the steering actuator.
- Feedback / Centering: Mechanical or electronic feedback returns the steering valve to neutral when input is released.
- Load Holding: Integrated check and pilot logic maintain steering cylinder positioning when at rest.
- Pilot / LS Logic: Optional load‑sense or torque options coordinate flow and pressure demands with the rest of the system.
101S Mounting Link Size
