800302267 YD13044059 DB428 Transmission for XCMG 300K/300KS Wheel Loader

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Product Description

800302267 DB428 Transmission / Gearbox — for XCMG 300K / 300KS Series Wheel Loaders

The DB428 transmission (part no. 800302267) is the core power-shift gearbox of XCMG 300K(GH) / 300KS(GH) / 300KS(RD) / 300KS(SM) 3-ton wheel loaders, built on the Advance (Hangzhou Advance Gearbox Group) DB428​ platform. It is an electro-hydraulically controlled power-shift transmission with 4 forward + 3 reverse gears, designed for separate mounting alongside the YJ315X torque converter to deliver smooth, reliable power transmission under heavy-duty construction and material-handling conditions.

In the XCMG 300K(T)-0201 transmission system, part 800302267 is listed as the primary "DB428 Gearbox" assembly, working in conjunction with torque converter 800302261 (YJ315X) and shift pump 803004135 to form the complete powertrain heart of the loader.

Key Features

• XCMG-Cataloged Part​ — Part No. 800302267, listed in XCMG 300K-series official parts catalog as "DB428 Gearbox"

• Advance DB428 Core​ — Manufactured on Hangzhou Advance's ZF-license platform, trusted by XCMG, SDLG, Lonking, Foton, Zoomlion and other major OEMs

• 4F / 3R Electro-Hydraulic Power Shift​ — Effortless gear changes via electro-hydraulic control, enhancing operational efficiency

• Separate Mounting with YJ315X Converter​ — Decoupled converter + gearbox design simplifies maintenance and improves engine compatibility

• Drop-in Upgrade for BS428/ZL30​ — Identical installation dimensions to the BS428 transmission (ZL30 loader), enabling upgrade to electronic shifting without modifying the vehicle frame

• Complete Sub-Assembly Structure​ — Includes housing, input assembly, output assembly (dual output flanges), control valve, speedometer, idler, parking brake, suction & filling pipes, and K1/V, K2/R, K3/4 clutch packs

• Heavy-Duty Build​ — Cast iron housing with baking paint surface treatment; rated for max 130 kW engine power and 1000 N·m input torque

Application & Compatibility

Specifically cataloged for XCMG 300K-series 3-ton wheel loaders:

The DB428 platform is also widely used in 3-ton loaders and motor graders​ across the industry, and is dimensionally compatible with the ZL30 / BS428 legacy transmission — making it a popular retrofit and upgrade choice.

Technical Specifications