THE 5-SECOND TRICK FOR BLUE BOOK VALUE EXCAVATOR

Hydraulic excavators commonly pair motor ability to (normally) 3 hydraulic pumps rather then to mechanical drivetrains. The 2 major pumps offer oil at high tension (up to 5000 psi, 345 bar) for the arms, swing motor, track motors and accessories when the third is usually a reduce force (≈700 psi, 48 bar) pump for pilot control of the spool valves