Hydraulic system 5.4
Boom summation — raise Both P1 and P2 pumps are used to raise the boom at higher speed. Raising the boom
• Moving the joystick also controls a second segment (boom 2). • Pump P2 supplies the boom 2 segment with oil. • The summation time (the time the boom 2 segment is switched) is specified by the piston spring in the boom 2 segment. Lowering the boom See Lowering the boom on page 5-17.
dr2 A8 pb4
B8 pb8
pa4
pa8
Boom 2
5-16
P1
P2
Boom 1
918170/AP0905
