Direct displacement drive system
The direct displacement control varies the swashplate angle. Swashplate angle determines pump flow
and motor speed.
Pictorial circuit diagram
Variable
displacement
pump
Input
shaft
Cylinder
block
assembly
HPRV valves
Loop flushing valves
OMR
orbital
motor
Suction flow
Servo pressure
High pressure
Case flow
Charge pressure
Output
shaft
Filter
Charge pump
Reservoir
Heat
exchanger
Heat exchanger
bypass
Charge relief
valve
Bypass
valve
P100586
The diagram shows an LPV pump driving an OMR motor. The system shown uses an external charge pump and external filter. Charge
pressure relief valves, high pressure relief valves, and loop flushing valves are shown separated from the pump to provide clarity to the
hydraulic system.
LPV Pump schematic diagram
Charge pressure
inlet
Port A
Port B
P106287
L2
L1
Technical Information
LPV Axial Piston Pumps
General description
©
Danfoss | September 2017
520L0954 | BC00000044en-US0102 | 7