4025122
Main Bearing .020 Set
Cummins®

The Main Bearing 0.020 Set, also known as the crankshaft bearing, is a crucial component in the engine block of a truck. Its primary function is to reduce friction between the crankshaft and engine block, allowing for smooth rotation and power transfer. The 0.020 set denotes the thickness of each bearing, which must be precisely matched to the crankshaft journal diameter for proper clearance and lubrication. This set includes multiple bearings that are strategically placed along the length of the crankshaft to evenly distribute loads and prevent excessive wear or damage. Without properly functioning main bearings, a truck's engine could experience catastrophic failure due to metal-to-metal contact or seizure of moving parts. Therefore, regular inspection and replacement of worn or damaged main bearings is essential for maintaining reliable performance and longevity of a truck's engine.