Need quick answers about Komatsu D155A cylinder block replacement? This video walks you through the 175-30-24222 and 175-30-24223 cylinder block assembly for D150A-1 and D155A-2A bulldozers. See how it converts hydraulic pressure into track tension force, absorbs impact loads, and maintains stable preload. We show the OEM-quality part, key components, and installation points so you can judge fit and durability fast.