K4VG (Replacement for A4VG Series 32) Replacement hydraulic pump for A4VG series 32 axial piston variable pump

High pressure pump for closed circuits size: 28-250 Nominal pressure 400 bar Maximum pressure 450 bar Closed circuits Features Integrated auxiliary pump for boost and pilot oil supply Change the flow direction smoothly by moving the swashplate through the neural position High-pressure relief valve with integrated boost function With adjustable pressure cut-off Boost-pressure relief valve Through drive for mounting of further pumps up to the same nominal size Large variety of controls Swashplate design Technical Parameters

Size				28	40	56	71	90	125	180	250
Displacement		Vg max	cm³	28	40	56	71	90	125	180	250
geometric,per revolution
Nominal pressure		pnom	bar	400	400	400	400	400	400	400	400
Max. pressure		pmax	bar	450	450	450	450	450	450	450	450
Max. speed	at Vg max	nnom	rpm	4250	4000	3600	3300	3050	2850	2500	2400
	Intermittent 1)	nmax	rpm	5000	5000	4500	4100	3800	3450	3000	2700
Flow	at Vg max and nnom	qV nom	l/min	119	160	202	234	275	356	450	600
Power	at qV nom and ΔPnom	P	kW	79	107	134	156	183	238	300	400
Torque	at V g max and ΔPnom	M	Nm	178	255	357	452	573	796	1146	1592
Weight (approx.)		m	kg	29	31	38	50	60	80	101	156
1)At Δp = 70 ~ 150 bar or Δp <300 bar and t <0.1 s 2)Δpnom = 400 bar

Description

K4VG swashplate axial piston pump is intended for medium-to-high pressure applications. With its diversified design, high performance and extensive range of controls, axial piston variable pump proves a perfect solution for applications in the mobile sector.
The K4VG is an axial piston variable pump with swashplate design for hydrostatic drives in closed circuits. The flow of the variable displacement pump is proportional to the drive speed and displacement, which can be steplessly changed by adjusting the cradle.
The pistons are axially arranged to the drive shaft in its axial piston unit with swashplate design. Hydraulic fluid flows from the hydraulic pump to the motor and directly back to the pump in a closed circuit. Depending on which side is under load, the unit has a high-pressure and a low-pressure side.
The K4VG axial piston variable pumps are mainly used in truck-mounted concrete pumps cotton pickers, agricultural tractors, mining machines and other industrial machinery.

Applications
Truck-mounted Concrete Pump

Cotton picker

Farm tractor

Mining machine