Komatsu PC200-6 PC200-7 PC200-8 PC120 PC130 PC240 PC360 Hydraulic Pressure Switch Sensor for Control Valve

Precision Pressure Monitoring for Komatsu Hydraulic Control Valves

This high-quality Hydraulic Pressure Switch/Sensor is a critical electronic component designed for the main control valve (分配阀) of various Komatsu dash-6, dash-7, and dash-8 generation excavators, including models like PC120, PC130, PC200, PC240, and PC360. It monitors pilot pressure or working pressure at specific points on the valve and sends crucial signals to the machine’s computer (Monitor Controller) to enable and regulate hydraulic functions.

Technical Specifications & Features:

• ⚙️ Type: Normally Open (NO) / Normally Closed (NC) pressure switch OR analog pressure sensor (varies by location on valve)
• 🔧 Compatible Machine Series:
  • Dash-6 Series: e.g., PC200-6, PC120-6, PC300-6, PC360-6
  • Dash-7 Series: e.g., PC200-7, PC130-7, PC240-7, PC360-7
  • Dash-8 Series: e.g., PC200-8, PC138US-8, PC240-8, PC360-8
  • (Exact compatibility depends on the specific switch’s function and port thread)
• ⛓️ Pressure Range: Designed to operate within Komatsu’s specified pilot and main system pressure ranges (typically 30-50 bar for pilot, higher for specific main functions).
• 🛡️ Electrical Connection: 2-pin or 3-pin waterproof, vibration-resistant connector.
• 📏 Thread Size: Common metric threads (e.g., M10x1.0, M10x1.25) for installation into the control valve block.
• 🧰 Function: Provides on/off signal or variable signal for functions like:
  • Pilot pressure monitoring
  • Attachment control enablement
  • Travel/Steering priority control
  • Work mode selection logic

Key Functions & Benefits:

⚠️ Common Symptoms of a Failing Pressure Switch/Sensor:

If you experience any of these issues on your Komatsu excavator, a faulty control valve pressure switch could be the cause:

• Specific hydraulic functions not working (e.g., travel, attachment, swing).
• Machine enters a safety mode or limits power unexpectedly.
• Error codes related to hydraulic pressure or valve solenoids appear on the dashboard monitor.
• Erratic or slow operation of hydraulic functions.
• Auto-idle or auto-shutdown features not functioning correctly.

⚠️ Important Installation Notice:

• Depressurize the System: Before installation, completely release all hydraulic pressure by turning off the engine and slowly operating all control levers to relieve pressure in the lines.
• Cleanliness is Critical: Thoroughly clean the area around the sensor port on the control valve before removal. Even a small amount of dirt can damage the hydraulic system.
• Verify Compatibility: It is highly recommended to compare the old and new sensors (thread size, electrical connector type, number of pins) before installation. Providing your machine’s model and serial number ensures the correct part.
• Use Thread Sealant: If required, use a hydraulic-rated thread sealant (e.g., Loctite 577) on the threads, ensuring it does not contaminate the sensor port.