1. General Description

2. Key Specifications

• Model: 004S63JOGB4VPL (J761-004)

• Electrical Supply: +24 VDC (±10%); Power ≤ 15 W (max)

• Control Signals: Voltage: 0–±10 VDC; Current: 0–±10 mA / ±4–20 mA (optional)

• Hydraulic Flow: 4 US gpm (15 L/min) @ 1000 psi (69 bar)

• Max Pressure: 3000 psi (207 bar)

• Spool Configuration: 4-way, 3-position (closed center); Overlap ≤ 0.0005 in (0.0127 mm)

• Position Sensing: Integrated LVDT; Accuracy ±0.5% full-scale

• Response Time: ≤ 30 ms (90% step @ 1000 psi); Frequency Response: 50 Hz (±3 dB)

• Operating Temp: -20°C to +60°C (-4°F to +140°F)

• Protection: IP65 (dust/water resistant)

3. Features

• Closed-Loop LVDT Feedback: Real-time spool position correction; eliminates drift; maintains ±0.001 in positioning precision.

• PWM Force Motor: 30% lower power consumption than analog drives; reduced heat; longer service life.

• High Dynamic Performance: Fast response and wide bandwidth for closed-loop motion control.

• Compact & Rugged: Industrial-grade construction for harsh environments.

4. Installation

1. Mounting: Install on a flat, rigid surface; use 4 mounting holes (pattern per MOOG standard). Torque bolts to 12–15 Nm (9–11 ft-lb).

2. Hydraulic Connections:

   • Port P: Supply pressure (max 3000 psi)

   • Port T: Return to tank (≤ 100 psi backpressure)

   • Ports A/B: Actuator lines

   • Use clean, filtered hydraulic fluid (ISO 4406 class 18/15 or better).

3. Electrical Connections:

   • Power: +24 VDC (red = +24 V, black = GND)

   • Control Signal: ±10 V / ±20 mA (per pinout)

   • LVDT Feedback: Differential signal (for closed-loop control)

   • Warning: Disconnect power before wiring; avoid reverse polarity.

5. Operation

1. Power-Up: Apply +24 VDC; the valve initializes (LVDT self-calibration, ~2 s).

2. Control Mode:

   • Open-Loop: Apply ±10 V / ±20 mA command to move spool proportionally.

   • Closed-Loop: Use LVDT feedback for precise position control; adjust gain/offset via controller.

3. Shutdown: Remove control signal first, then disconnect power; relieve hydraulic pressure before maintenance.

6. Maintenance

• Fluid Quality: Replace fluid every 2000 hours; inspect filters monthly.

• LVDT Check: Verify feedback signal (±5 VDC full-scale) quarterly.

• Seal Inspection: Check for leaks at ports/flanges; replace seals if needed.

• Cleaning: Keep valve exterior clean; avoid debris on mounting surfaces.

7. Safety Warnings

• High Pressure: Relieve all pressure before servicing; pressure can cause severe injury.

• Electrical Hazard: Disconnect power before wiring/maintenance; 24 VDC can cause shock.

• Qualified Personnel: Installation, wiring, and maintenance must be performed by trained technicians.

• Environmental: Do not expose to extreme temperatures, moisture, or corrosive chemicals.

8. Troubleshooting

9. Warranty

• 12 months from delivery for new units; 6 months for refurbished units (valid against manufacturing defects).