The Komatsu transmission gear with code 421-15-12251 (4211512251) is fully compatible with the WA400-1, WA420-1, WA470-1, and WA500-3 wheel loader series. Providing power transmission in heavy machinery transmission systems, this gear component plays a critical role in the stable operation of the drivetrain.
During drivetrain replacements, gear profiles, engagement lugs, and shaft bearing diameters must match precisely. During internal transmission overhaul processes, it is important to cross-reference catalog numbers and machine serial groups with workshop documents.
You can check the part number 421-15-12251 to confirm the correct part fitment for your WA400-1, WA420-1, WA470-1, and WA500-3 series machinery.
