OEM 423-33-31331 is a hardened steel reaction plate used in the wet multi-disc brake systems of Komatsu WA380 series wheel loaders.
Unlike friction or separator plates, this component functions as a fixed reaction surface, absorbing counterforces generated during braking and providing structural support to the entire disc stack.
Manufactured with precision grinding and heat treatment, it ensures dimensional stability and maintains alignment of the brake pack under high torque loads.
This plate contributes to optimal brake modulation, improved response time, and longer system life in demanding off-road and quarry operations.
Outer Diameter: 387,6 MM
Inner Diameter: 266,0 MM
Thickness: 3,2 MM
Material: Steel
Teeth: 4
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