800302267 Transmission – Model YD13044059 DB428, XCMG Loader Drivetrain Related

A transmission (also called gearbox or powershift transmission) is the core component of a construction machinery drivetrain, installed between the engine and the drive axle, responsible for transforming the engine's output torque and speed into multiple gear ratios according to working conditions, and transmitting power to the drive wheels or working attachments via the output shaft. Loaders with hydro-mechanical drive typically adopt a "engine + hydrodynamic torque converter + powershift transmission" architecture, where the transmission handles gear shifting and torque distribution while the torque converter provides flexible drive during startup and low-speed high-torque conditions.

Product characteristics of the DB428 transmission​ (per Hangzhou Advance Gearbox Group's public product data):

• Basic structure: The DB428 is an electro-hydraulic powershift transmission with 4 forward gears and 3 reverse gears​ .

• Performance parameters:

  • Maximum engine power 130 kW​

  • Maximum engine speed 2600 r/min​

  • Maximum input torque 1000 N·m​

  • Gear positions: 4 forward / 3 reverse​

  • Shifting method: electro-hydraulic control​

  • Input type: flange​

  • Output type: flange, dual-output​

• Matching relationship: Typically used separately installed together with a YJ315X torque converter​ . The YJ315X is a 3-ton-class loader torque converter with a 315 mm torus diameter, 3 PTO ports, and flange output .

• Compatibility design: The DB428's mounting dimensions are identical to the BS428 transmission (i.e., ZL30), enabling an upgrade to electronic shift control without modifying the frame​ —a key selling point of the DB428 for retrofitting older ZL30 platforms .

• Application field: The DB428 transmission is widely used in motor graders​ , and is also found on 3-ton-class loader platforms .