1070991 Bearing Set Main Standard Fits Caterpillar 3046 315C 317B L 317B LN 318BOne New Aftermarket Replacement Standard Main Bearing Set Fits Caterpillar (Fits CAT) 3046 Engine This standard (STD) main bearing set supports the crankshaft in the Fits Caterpillar 3046 engine, fitting the crankshaft main journals to maintain proper oil clearance and engine integrity. The 3046 is a 4 cylinder diesel engine used across Fits Caterpillar excavators, track loaders, and track type tractors. This set is a direct aftermarket replacement