Caterpillar 1-1N 4323

Caterpillar 1N-4323 is a genuine Cat main bearing insert (YATAĞI) cataloged under part number 1N-4323. This bearing plays a critical role in Caterpillar diesel engines by supporting the crankshaft and enabling smooth rotation under load, forming part of the engine's main bearing assembly. As a Cat component, it carries Caterpillar’s engineering and quality standards, and is designed to fit Cat equipment as a replacement part in engine rebuilds or routine maintenance. This bearing insert contributes to crankshaft alignment and proper oil film separation, helping protect the engine from excessive wear and premature failure when installed and torqued per Caterpillar service procedures. Sold through Cat parts channels, 1N-4323 is intended for use in compatible Cat engine configurations and should be installed using the exact Cat part to ensure the correct bearing clearance and seating.