Ensure maximum structural integrity in your D11-series Caterpillar machines with the Caterpillar 123-4011 Steel Bearing Cap — engineered with a 256mm internal diameter for precise alignment and superior load distribution. Designed for compatibility with high-performance track-type tractors such as D11R-AAF, D11T-AMA, D11T-JEL, D11T-MDG, D11-KSN, D11-TKN, D11R-7PZ, D11R-9TR, D11R-9XR, D11T-GEB, D11T-JNS, and D11T-TPB, this OEM-grade cap delivers long-lasting support under high axial and radial loads. Whether you are rebuilding or maintaining your machine’s differential or main housing system, the 123-4011 bearing cap is your trusted replacement solution for heavy-duty mining environments.