Hefei Youzhipin Engineering Machinery Co.,,Ltd.

125-9859: 24.5 V pressure transmitter 1259895 pressure sensor

Product Specifications

  • OEM Part Number: 125-9859, 1259895 (100% interchangeable with genuine parts)
  • Product Type: Pressure Transmitter / Pressure Sensor for Construction Machinery
  • Rated Voltage: 24.5V DC (compatible with 24V on-board circuit of construction machinery)
  • Structure Features:
    • Standard threaded mounting stud + hex lock nut, easy installation, excellent sealing performance
    • Galvanized metal valve body + high-strength engineering plastic sheath, corrosion-resistant, high pressure resistant, vibration-resistant
    • Waterproof electrical connector, dust-proof, waterproof and oil-resistant, compatible with on-board circuits
    • Built-in high-precision pressure sensing chip, sensitive response and strong anti-interference ability
  • Applicable Models: Caterpillar full-series excavators, loaders, graders, generator sets and other construction machinery (such as 3126, C7, C9 series engines)
  • Working Principle: Pressure pushes the sensing diaphragm to deform, converts pressure into linear electrical signals through piezoresistive effect, and the ECU calculates the real-time pressure through the signal
  • Installation: Directly screw into the corresponding mounting hole of the engine/hydraulic system, standard connector for plug-and-play use

1 pc

MOQ

Please send mail or WhatsApp

Price

Product Description

Product Overview

This is a Pressure Transmitter (also known as Pressure Sensor) specially designed for Caterpillar construction machinery, with OEM part number 125-9859 (1259895). It is a core monitoring component for Caterpillar diesel engines and hydraulic systems. Adopting high-precision pressure sensing technology, it converts engine oil/hydraulic oil pressure into standard electrical signals, providing accurate pressure data for the ECU. It is a key component to ensure stable operation and fault early warning of the engine/hydraulic system, with a rated operating voltage of 24.5V, widely compatible with Caterpillar full-series construction machinery.

Core Functions

  1. Accurate Pressure Monitoring: Built-in high-precision piezoelectric/piezoresistive sensing element, real-time and accurate collection of engine oil pressure and hydraulic system pressure, linearly converts pressure signals into electrical signals, providing continuous and stable working condition data for the ECU, ensuring the equipment is always in a safe pressure range.
  2. Intelligent Condition Adjustment: The ECU automatically adjusts parameters such as oil pump output and hydraulic system flow according to the pressure signal fed back by the sensor, optimizing lubrication efficiency and power output, avoiding dry friction damage caused by low oil pressure, and improving equipment reliability and fuel economy.
  3. Fault Early Warning & Protection: When the pressure rises/drops abnormally, the sensor sends an early warning signal to the ECU, triggering the dashboard alarm, reminding the driver to stop and overhaul in time to prevent serious faults such as engine cylinder scuffing and hydraulic pipeline bursting, ensuring equipment and personnel safety.
  4. Ready-to-Install: 1:1 reproduction of the original factory size, thread specification and electrical interface, fully matching the original mounting position and circuit system of the corresponding Caterpillar models. No modification required, direct replacement of the original part, convenient and efficient maintenance, greatly reducing downtime.
  5. Product Advantages

    Genuine-level Fitment: Strictly follows the original Caterpillar design, 1:1 reproduction of size, interface and performance, perfect fit for corresponding models, zero barrier for installation

    High-precision Monitoring: Adopts imported sensing chip, small pressure measurement error, fast response speed, accurate and reliable data

    Durability: High-quality materials and sealing structure, corrosion-resistant, high and low temperature resistant, vibration-resistant, suitable for harsh construction site operating environment

    Cost-effective: Aftermarket replacement part, much lower cost than genuine parts, performance fully matches genuine parts, with perfect after-sales guarantee

Gallery

Get in touch with us

Address:

No. 23 Bridge Pier, Chengfeng Excavator Parts, Baoye City Green Garden (East Area), Tongling Road, Datong Road Subdistrict, Yaohai District, Hefei, Anhui, China.

Tel:

13427233834

WhatsApp:

+8613427233834

Email:

18820999946@163.com
13427233834@163.com

Contact Form Demo (#3) (#4)

Contact Us

Contact Form Demo (#3)