Hyundai R125 R140 R145 R160 R170 Excavator Hydraulic Main Pump Pressure Sensor 31Q4-40620 31Q8-40520

Product Details

Product Overview

This high-quality Hydraulic Main Pump Pressure Sensor is specifically designed for use in a wide range of Hyundai excavator models, including the R125, R140, R145, R160, and R170 series. As a critical component of the hydraulic system, this sensor monitors the pressure output of the main pump, ensuring optimal performance and preventing system damage from over-pressurization or pressure loss.

Manufactured to OEM specifications, this pressure sensor provides a direct replacement for multiple OEM part numbers, including 31Q4-40620, 31Q8-40520, and 31Q4-40830. It is engineered to deliver accurate pressure readings at up to 50 Bar, making it an essential part for maintaining the efficiency and longevity of your excavator’s hydraulic system. Whether you are servicing a Hyundai R55 or a larger R250 model, this sensor offers reliable performance and easy installation.

Key Features & Benefits

• Precision Engineering: Manufactured to match OEM size and specifications, ensuring a perfect fit and accurate pressure sensing for your Hyundai excavator.
• Broad Compatibility: Commonly used for a wide range of Hyundai models from R55 to R250, making it a versatile stock item for maintenance teams and parts distributors.
• High Durability: Designed to withstand the harsh operating conditions of heavy machinery, providing long service life and reliable performance under high pressure.
• Direct Replacement: Cross-references with OEM numbers 31Q4-40620, 31Q8-40520, and 31Q4-40830, simplifying part identification and procurement.
• Cost-Effective Solution: A high-quality alternative to genuine OEM parts, offering significant cost savings without compromising on performance or reliability.
• Easy Installation: Standard connector and mounting design allow for a straightforward swap, minimizing machine downtime.
• Comprehensive Support: Backed by a 6-month warranty and after-warranty online technical support for peace of mind.

Technical Specifications

OEM Cross-Reference

This pressure sensor is a direct replacement for the following original equipment manufacturer (OEM) part numbers:

• 31Q4-40620 – Primary OEM Number
• 31Q8-40520 – Alternative OEM Number
• 31Q4-40830 – Alternative OEM Number

Note: Always verify the original part number on your existing sensor before ordering to ensure correct compatibility.

Compatibility

This Hydraulic Main Pump Pressure Sensor is commonly used for the following Hyundai excavator models:

• Compact Excavators: R55, R60, R80
• Medium Excavators: R125, R140, R145, R160, R170, R180
• Large Excavators: R210, R220, R235, R250

Please confirm your specific machine model and existing part number to ensure a proper fit.

Global Supply & Distribution

We maintain a robust global supply chain to ensure fast and reliable delivery of your Hyundai excavator parts, no matter where your operation is located. Our inventory is strategically managed to support urgent requirements and bulk orders for fleet maintenance.

• Worldwide Shipping: We ship to all major continents, including North America, South America, Europe, Asia-Pacific, Africa, and the Middle East.
• Fast Delivery: Expedited shipping options are available to major ports and industrial centers such as Los Angeles, Rotterdam, Shanghai, Dubai, and Singapore.
• Bulk & Wholesale: We welcome wholesale and bulk purchase inquiries, offering competitive pricing for parts distributors and large fleet operators.
• Export Compliance: All shipments are handled in compliance with international trade regulations, with professional documentation provided for customs clearance.

Quality Assurance

Every part we supply undergoes rigorous quality checks to ensure it meets the high standards required for heavy machinery operations. Our commitment to quality is reflected in our testing and warranty processes.

• Inspection: Each sensor is tested for pressure accuracy and electrical continuity before shipment. Video inspection is available upon request.
• Certification: Machinery test reports are provided to verify performance specifications.
• Warranty: All parts come with a standard 6-month warranty against manufacturing defects.
• Support: After-warranty, our team provides online technical support to assist with installation and troubleshooting.

FAQ

1. How do I know if this pressure sensor is compatible with my Hyundai excavator?

First, locate the existing pressure sensor on your main hydraulic pump. Check the part number printed on the sensor body. If it matches any of our cross-reference numbers (31Q4-40620, 31Q8-40520, or 31Q4-40830), this sensor is a direct replacement. Additionally, confirm your excavator model is listed in our compatibility section (e.g., R125, R140, R220). If you are unsure, please contact our support team with your machine’s serial number for verification.

2. What are the common symptoms of a failing main pump pressure sensor?

A failing sensor can cause several operational issues, including: erratic or slow hydraulic movements, reduced digging power, error codes on the machine’s monitor panel, or the engine going into a “limp mode” to protect the system. If you experience any of these symptoms, testing or replacing the pressure sensor is a recommended first step before investigating the main pump itself.

3. What is the installation procedure for this sensor?

Installation is straightforward. First, ensure the hydraulic system is depressurized and the engine is off. Disconnect the electrical connector and remove the old sensor using a suitable socket or wrench. Clean the mounting surface, apply a small amount of thread sealant if required, and install the new sensor. Torque to the manufacturer’s specification (typically 25-35 Nm). Reconnect the electrical harness, start the machine, and check for any leaks or fault codes. Always consult your machine’s service manual for specific torque values and procedures.