CATERPILLAR-3304-BALANCE-BEARING

9Y2991 is a balance shaft bearing for the Caterpillar 3304 engine, part of the counter-rotating assembly that cancels out the inherent vibration of this engine's cylinder layout. When this bearing wears, the balance shaft loses its precise timing relative to the crank, and the vibration it's meant to cancel comes back — often felt through the cab or chassis before it's heard. It's a precision fit item, so correct installation torque matters as much as the part itself. Orange.net.za delivers fast, South Africa-wide.