LC52S00019P1 LOW PRESS SENSOR

Product Overview

The LC52S00019P1 / YN52S00214P1 Low Pressure Sensor is a precision hydraulic component engineered for the Kobelco SK200-8, SK210LC-8, SK250-8, SK260LC-8, and SK350-8 excavators. This low pressure sensor, also known as a hydraulic pressure sensor or pressure transducer, monitors pressure in the machine’s low-pressure hydraulic circuits, providing real-time data to the machine controller for precise hydraulic management .

The Kobelco SK200-8 and SK210LC-8 are 20-21 ton class excavators, while the SK250-8 and SK260LC-8 are 25-26 ton class machines, and the SK350-8 is a 35-ton class large excavator . All these models are powered by Hino diesel engines (J05E for smaller models, J08E for SK350-8) and feature sophisticated electro-hydraulic control systems that rely on accurate sensor data for optimal performance .

Low pressure sensors like LC52S00019P1 are typically used to monitor pilot circuit pressure, case drain pressure, or other low-pressure hydraulic circuits (typically in the 0-10 MPa range) . The sensor outputs an analog voltage signal to the machine controller, which uses this information to regulate pump flow, control proportional valves, and ensure smooth implement operation. When a low pressure sensor fails or provides inaccurate readings, the excavator may experience sluggish implement response, erratic hydraulic behavior, diagnostic fault codes, or reduced performance. Replacing a faulty sensor with this OEM-specification component restores accurate pressure monitoring and proper machine function .

Key Features

• Dual Part Number Reference: Equivalent to both LC52S00019P1 and YN52S00214P1, ensuring compatibility with multiple Kobelco parts lookup systems.

• Precision Pressure Monitoring: Engineered to measure low hydraulic pressures typically in the 0-10 MPa range with high accuracy for reliable control system feedback .

• Robust Construction: Manufactured from durable materials, including stainless steel and copper alloy components, to resist corrosion, vibration, and temperature fluctuations .

• Analog Voltage Output: Provides a clean, stable analog signal compatible with Kobelco’s machine control system for precise pressure data transmission.

• Wide Voltage Compatibility: Supports both 5V and 24V DC supply options for broad application across different Kobelco models .

• OEM Specification: Manufactured to meet or exceed original equipment standards for reliable hydraulic system monitoring .

• Rigorous Testing: Each sensor undergoes calibration and pressure testing to ensure OEM-quality performance .

• Direct Replacement: Matches OEM mounting threads and connector configuration for straightforward installation.

Compatibility

This low pressure sensor is a direct replacement for the following Kobelco excavator models:

8-Series Models

• Kobelco SK200-8

• Kobelco SK210LC-8 

• Kobelco SK250-8

• Kobelco SK260LC-8

• Kobelco SK350-8 

Additional Compatible Models (Verify Fitment)

• SK200-8E, SK200LC-8 

• SK210-6E, SK210LC-6E

• SK220XD-10, SK380XD-10

• SK140SRLC, SK140SR-7

• SK135SR, SK135SR-1E

• SK115SRDZ, SK115SRDZ-1E

• SK235SR-1E

• SK70SR, SK80CS

• SK480-8

• SR Series models

Part Number Reference

Also Known As: Low Pressure Sensor, Hydraulic Pressure Sensor, Pressure Transducer, Low Pressure Switch, Pilot Pressure Sensor, Hydraulic Monitoring Sensor

Please verify your machine’s serial number and the specific sensor location by comparing with your original part before purchasing.

Technical Specifications

How the Low Pressure Sensor Works

Operating Principle

The LC52S00019P1 low pressure sensor converts hydraulic pressure into an electrical signal. As pressure in the monitored circuit changes, a internal sensing element (typically a piezoelectric or strain gauge device) deforms proportionally, generating a corresponding analog voltage output that the machine controller can interpret.

Typical Applications on 8-Series Excavators

On Kobelko SK200-8 through SK350-8 excavators, low pressure sensors are used in several critical circuits:

Signal to Controller

The sensor sends its analog voltage signal to the machine controller or hydraulic pump controller. The controller uses this data to:

• Regulate pump displacement based on load requirements

• Control proportional solenoid valves for smooth implement response

• Trigger warning lights or alarms when pressures fall outside normal ranges

• Adjust engine speed via the auto-deceleration system

Signs Your Low Pressure Sensor Needs Replacement

The low pressure sensor can fail due to internal component damage, contamination, or electrical issues. Replace your sensor if you observe:

1. Pressure-Related Fault Codes: The machine monitor displays diagnostic trouble codes related to low pressure sensor circuits, such as “Pilot Pressure Sensor Fault” or “Low Pressure Sensor Out of Range.”

2. Sluggish Implement Response: The excavator’s hydraulic response is delayed or hesitant, indicating the controller is not receiving accurate pilot pressure data.

3. Erratic Hydraulic Operation: Implement movements are jerky or inconsistent, particularly during fine control operations.

4. Reduced Digging Performance: The machine may operate at reduced power or in limp mode due to the controller receiving invalid pressure readings.

5. Intermittent Warnings: The low pressure warning light or alarm activates intermittently without any actual pressure issue present.

6. Visible Sensor Damage: Cracked housing, damaged connector, corrosion on the sensor body or electrical terminals.

7. Fluid Leakage: Hydraulic oil leaking from the sensor threads or body indicates internal seal failure.

8. Sensor Replacement Does Not Resolve Issue: If the sensor has been replaced but problems persist, the harness or controller may be the issue.

9. After Hydraulic Contamination Event: If the hydraulic system has experienced a pump failure or other major component failure, sensors may be contaminated and should be replaced.

Benefits

Why choose our LC52S00019P1 / YN52S00214P1 Low Pressure Sensor for your Kobelco excavator?

1. Restores Accurate Pressure Monitoring: A new, properly calibrated sensor ensures the machine controller receives accurate pressure data for optimal hydraulic control .

2. Eliminates Fault Codes: Replaces a failed sensor to permanently resolve pressure sensor-related diagnostic trouble codes.

3. Restores Smooth Hydraulic Control: Accurate pilot pressure monitoring enables smooth, proportional implement response.

4. Prevents Costly Misdiagnosis: A failing sensor is often mistaken for a failed controller or pump. Replacement is a cost-effective first step.

5. Improves Machine Safety: Proper pressure monitoring ensures the machine controller receives accurate data for safety functions like brake release detection.

6. Extends Hydraulic Component Life: Accurate pressure feedback prevents the controller from over-pressurizing circuits or running pumps inefficiently.

7. OEM-Quality Reliability: Manufactured to meet or exceed original equipment standards for durability and accuracy .

8. Prevents Hydraulic System Damage: Detecting abnormal low pressure conditions early can prevent pump cavitation or other system damage.

Installation Tips

• Professional Installation Recommended: Hydraulic sensor replacement requires system knowledge and proper cleanliness procedures. Professional installation is strongly recommended.

• Relieve Hydraulic Pressure: Before removing the old sensor, cycle the machine with the engine off to relieve trapped hydraulic pressure.

• Clean the Area: Thoroughly clean the area around the sensor before removal to prevent contamination from entering the hydraulic port.

• Use Thread Sealant (If Required): If the sensor uses tapered threads, apply a small amount of thread sealant. If it uses O-ring sealing, ensure the O-ring is properly seated.

• Do Not Overtighten: Tighten the sensor to manufacturer specifications. Overtightening can damage the sensor or the mounting port threads.

• Check Electrical Connection: Inspect the wiring harness connector for corrosion, bent pins, or damage before connecting the new sensor.

• Apply Dielectric Grease: A small amount of dielectric grease on the connector seal (not terminals) can enhance moisture protection.

• Test Operation: After installation, start the machine and monitor the pressure reading on the diagnostic display or using a pressure gauge to verify proper operation.

• Clear Fault Codes: Use a diagnostic tool to clear any stored pressure sensor-related fault codes after installation.

The Mechatro Control System and Sensor Integration

Kobelco excavators utilize the Mechatro (Mechatronics) Control System, which synchronizes engine output with hydraulic pump displacement . Low pressure sensors like the LC52S00019P1 are integral to this system, providing essential feedback for:

• Pump Flow Control: The controller adjusts pump displacement based on load sensing pressure signals.

• Auto-Deceleration: The system reduces engine speed when all joysticks are in neutral, saving fuel.

• Power Mode Selection: The controller adjusts hydraulic response based on operator-selected power modes.

• Diagnostic Function: The system monitors sensor values to detect faults and alert the operator.

Attempting to diagnose these systems without verified manufacturer data can lead to performance loss and safety risks. Proper sensor function is critical for maintaining the precision and efficiency of the Mechatro system .

Common Pressure Ranges and Locations

Based on industry standards for Kobelco excavators, low pressure sensors are typically used in the following applications:

The LC52S00019P1 sensor is specifically calibrated for low-pressure monitoring applications .

Why Choose Our Low Pressure Sensor?

We understand that Kobelco 8-series excavators rely on accurate sensor data for their sophisticated electro-hydraulic control systems. The low pressure sensor is a small but critical component that directly affects hydraulic performance, fuel efficiency, and machine reliability.

A failing low pressure sensor can cause frustrating symptoms that are difficult to diagnose—sluggish response, erratic operation, and fault codes that come and go. Replacing a suspect sensor is often the most cost-effective first step in troubleshooting.

Our LC52S00019P1 / YN52S00214P1 Low Pressure Sensor is manufactured to strict quality standards using durable materials and precision calibration, ensuring accurate pressure monitoring and reliable long-term performance . Whether you are troubleshooting hydraulic issues, responding to fault codes, or performing preventative maintenance on your fleet, this direct-fit sensor provides the reliable pressure monitoring your Kobelco excavator requires.

Ordering Information

Order your LC52S00019P1 / YN52S00214P1 Low Pressure Sensor today and restore accurate hydraulic pressure monitoring to your Kobelco SK200-8, SK210LC-8, SK250-8, SK260LC-8, or SK350-8 excavator. In stock and ready for immediate worldwide shipping. Bulk pricing available for fleet maintenance.