1. Product Model & Identification

• Product Model / OEM Part Number: 23019734 (This is likely the primary part number).

• Alternate / Reference Number: 3740594.

• Product Type: Transmission Control Solenoid Valve.

• Target Application: This solenoid valve is an OEM (Original Equipment Manufacturer) component designed specifically for integration into the automatic or powershift transmission system of Terex heavy equipment, such as articulated dump trucks, loaders, or cranes.

2. What Is Its Core Purpose? (Function)
This valve is an electro-hydraulic actuator that serves as a critical "messenger" and "executor" between the transmission's electronic control unit (TCU/ECU) and its hydraulic circuits.

• Electronic Command to Hydraulic Action: It receives low-power electrical signals (on/off or PWM) from the machine's transmission computer.

• Controls Gear Shifting & Clutch Pressure: By opening or closing specific hydraulic passages, it directly regulates the flow of transmission fluid (oil). This action is responsible for:

  • Engaging or disengaging specific clutch packs.

  • Controlling shift timing and quality.

  • Modulating line pressure within the transmission for smooth operation.

• Enables Automated Shifting: Its precise operation is what allows for the automated, seamless gear changes in modern Terex equipment, translating driver input and sensor data into physical gear shifts.

3. What Kind of Product Is It? (Product Category)
This component falls into a highly specific category:

• Hydraulic Solenoid Valve: A subtype of directional control valve actuated by an electromagnetic coil.

• Transmission Solenoid: A specialized solenoid valve engineered to meet the exact flow, pressure, response time, and durability requirements of a vehicle transmission.

• OEM Replacement Part: It is a direct replacement for the genuine part used in Terex manufacturing, intended for repair and maintenance to restore original performance specifications.

4. Key Characteristics & Design Features
As a critical transmission component, it is built with the following characteristics:

• Precision Engineering: Manufactured to extremely tight tolerances to ensure consistent flow rates and response times, which are vital for predictable shift behavior.

• Robust Construction: Designed to operate reliably in the harsh environment of a transmission, including constant exposure to hot hydraulic oil, vibration, and pressure spikes.

• Specific Electrical Interface: It features a sealed electrical connector with specific resistance (ohms) values that must match the transmission control unit's expectations.

• Material Compatibility: It uses seals and materials fully compatible with standard transmission fluids (e.g., ATF).

In summary, the Transmission Solenoid Valve (23019734 / 3740594) is a vital electronic-hydraulic interface component. Its failure typically causes shift-related faults (harsh shifting, slipping, failure to engage certain gears, or diagnostic trouble codes). Replacing it with a correct and high-quality unit is essential for restoring the precise gear-shifting functionality and overall performance of the Terex equipment's transmission system.