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COMPONENT OPERATION / Pump Device
OUTLINE
Pump device consists of main pump (1) and pilot pump
(2). Main pump (1) has built-in steering main relief
valve (5) and priority valve (6).
Driving force of the engine is transmitted to shaft (3)
through the transmission input shaft, and actuates
main pump (1) and pilot pump (2).
5
6
1 - Main Pump
2 - Pilot Pump
1
2
4
3 - Shaft
4 - Pump Delivery Pressure
Sensor
T3-1-1
Main pump (1) is a swash plate type variable
displacement axial plunger pump.
Pilot pump (2) is a gear pump.
Pump delivery pressure sensor (4) is provided in order
to control the main pump.
3
5 -
Steering Main Relief
Valve
6 -
Priority Valve
T4GB-03-01-001
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