Kobelco SK200-8 SK260-8 SK350-8 Hydraulic Pump Pressure Switch Sensor 15P1 | High Pressure Safety Switch
High-Pressure Switch/Sensor (Code: 15P1) for Kobelco SK200-8, SK260-8, SK350-8 excavator hydraulic pumps. Monitors system pressure and protects against overpressure. Reliable OEM-compatible replacement.
Critical Hydraulic System Protection for Kobelco Dash-8 Excavators
This High-Pressure Switch/Sensor (Code: 15P1) is a vital safety and control component for the main hydraulic pump on Kobelco SK200-8, SK260-8, and SK350-8 excavators. It continuously monitors the hydraulic pump’s output pressure and sends a signal to the machine’s main controller (MC) to automatically regulate power, prevent system overpressure, and protect against damage to expensive hydraulic components.
Technical Specifications & Features:
- ⚙️ Type: Electro-hydraulic pressure switch/sensor (Normally Open or Normally Closed)
- 🔧 Compatible Models:
- Kobelco SK200-8
- Kobelco SK260-8
- Kobelco SK350-8
- (Please confirm model compatibility based on your machine’s serial number)
- ⛓️ Operating Pressure Range: Designed for high-pressure hydraulic systems (typically 300-400 bar range)
- 🛡️ Electrical Connection: 2-pin or 3-pin waterproof connector (commonly used)
- 📏 Thread Size: Standard metric thread (e.g., M10x1.0, M12x1.5, or NPT 1/8″) for direct installation into the pump housing or manifold block.
- 🧰 Function: Sends an electrical signal (on/off or proportional) to the main control system when a preset pressure threshold is reached.
Key Functions & Benefits:
✔️ System Protection: Acts as a primary safety device, helping to prevent catastrophic pump and hydraulic system failures due to overpressure.
✔️ Optimal Performance: Ensures the excavator operates within its designed hydraulic parameters, maintaining efficiency and power.
✔️ Precision Monitoring: Provides critical pressure feedback to the MC for advanced control functions like power optimization and load sensing.
✔️ Reliable Operation:
- Built to withstand constant vibration and harsh environmental conditions.
- Sealed design resists oil, dust, and moisture ingress.
✔️ Prevents Downtime: A failing sensor can cause derated power, erratic operation, or even machine shutdown. Timely replacement ensures reliability.
⚠️ Symptoms of a Failing Pressure Switch/Sensor:
If you experience any of the following issues, this sensor may be the cause:
- Machine enters a “low power” or “derate” mode unexpectedly.
- Hydraulic functions become slow or weak.
- Error codes related to hydraulic pressure or pump control appear on the monitor.
- The excavator shuts down or will not operate normally.
- Visible oil leakage from the sensor body or electrical connector.
⚠️ Installation Notice:
- Depressurize System: Before installation, completely release all hydraulic pressure from the system by relieving the accumulator and moving all control levers.
- Cleanliness is Critical: Thoroughly clean the area around the port before removal to prevent contamination from entering the hydraulic system.
- Use Sealant: Apply appropriate thread sealant (e.g., Loctite 577) to the threads if required, ensuring it is compatible with hydraulic oil.
- Check Connector: Ensure the electrical connector is clean, dry, and securely fastened to prevent moisture entry and signal interruption.
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