Sistem mlaku excavator utamane dumadi saka pigura trek, lelungan assy final drive karo gearbox, sprocket, roller track, idler, perakitan silinder trek, roller carrier, perakitan sepatu trek, clamp rel lan liya-liyane.
Nalika excavator mlaku, saben awak wheel muter sadawane trek, motor lumampah drive sprocket, lan sprocket nguripake pin trek kanggo éling mlaku.