Caterpillar Crankshaft, 3442603

replaces: 3442603, 4P9857

Our forged steel cranks are very cost effective and strong. With new forging and machining technologies, we offer some of the best crankshafts available on the market today. All crankshafts are forged steel, core hardened and tempered to reduce stress and optimize tensile strength. Our crankshafts are designed to meet or often exceed original tolerances giving you the most precise best base for your bottom end rebuild.