Copyright
Goodheart-Willcox
Co.,
Inc.
434
Hydraulic
Systems
for
Mobile
Equipment
Figure 18-12. An LSPC system using a variable-displacement hydraulic pump simplifies the system and the schematic. The unloading valve and t he
main system relief are both incorporated into the pump’s compensator assembly, which is represented on the schematic by the arrow inside the envelope
attached to the pump symbol.
Variable-displacement load-sensing
pressure-compensating hydraulic pump