Pilot Pump; Pump Delivery Pressure Sensor - Hitachi ZW180 Technical Manual

PILOT PUMP

Drive gear (1) is driven via the shaft in the main pump,
which rotates driven gear (2) as they are meshed
together.
1 - Drive Gear

PUMP DELIVERY PRESSURE SENSOR

This sensor detects the pump delivery pressures,
which are used in order to control various operations.
When oil pressure is applied to diaphragm (6),
diaphragm (6) is deformed. The deformation of
diaphragm (6) is detected as electrical signals.
6 - Ground
7 - Output
COMPONENT OPERATION / Pump Device
2 - Driven Gear
8 - Power Source (5V)
9 - Pressure Receiving Area
(Diaphragm)
2
6 7 8
T3-1-19
Inlet Port
Outlet Port
T137-02-03-005
T157-02-03-010
9
1