Copyright Goodheart-Willcox Co., Inc.
450 Hydraulic Systems for Mobile Equipment
Figure 18-25. A—An LSPC hydraulic system without power beyond. B—An LSPC hydraulic system equipped with
power beyond. Note the difference in signal networks between the two systems. An extra shuttle valve is required
for the addition of power beyond.
A B
Return
coupler
LSPC variable-
displacement
hydraulic pump
LSPC variable-
displacement
hydraulic pump
DCV 1
DCV 2
DCV 3
DCV 1
DCV 2
DCV 3
Extra shuttle
valve
Power
beyond
Pump
pressure
coupler
Load-sensing
coupler