Shaanxi Automobile Delong (SHACMAN) Series Truck Brake Master Cylinder

1. Basic Part Information

• Part Name: Brake Master Cylinder (some models integrate an electronic sensor and are also called "electronic brake master cylinder")

• Applicable Models: Mainly suitable for SHACMAN Delong series heavy-duty trucks, specifically newer China VI or quasi-China VI models such as Delong New M3000S, Delong X5000, and Delong L5000.

• Appearance Features:

  • Main Body: Die-cast aluminum construction, silver-gray color, with machined mounting points for the reservoir and multiple hydraulic line ports.

  • Electronic Component: A black wiring harness on one side terminates with a sensor (typically a brake light switch or pedal travel sensor) featuring a yellow or black waterproof connector. This indicates the master cylinder has electronic functionality, allowing it to interface with the vehicle's ABS/ESC systems.

  • Identification Plate: The side of the body typically has a cast part number (e.g., DZ94189360070) and production batch information.

2. Function & Role

• Hydraulic/Pneumatic Conversion: Converts the mechanical force from the brake pedal into hydraulic pressure (or control air pressure in air-over-hydraulic systems), transmitting it through lines to the brake slave cylinders (or brake chambers) to apply the brakes (pads against discs or shoes against drums).

• Electronic Control: The integrated sensor monitors brake pedal status. When the driver presses the brake, the sensor sends a signal to the ECU — activating the brake lights, and also controlling ABS solenoids or engaging the AEB system if equipped.

• Safety Assurance: As the "heart" of the braking system, its sealing integrity and response speed directly determine brake sensitivity and reliability — making it a critical component for driving safety.

3. Common Part Numbers for Reference

Based on SHACMAN parts information, common official part numbers for Delong series brake master cylinders may include:

• DZ94189360070: Common brake master cylinder assembly (with electronic switch) for Delong X5000 / New M3000S

• DZ94189360071: Possibly a variant with different ports or sensor configuration

• DZ95189360010: General-purpose brake master cylinder for older Delong models