Putzmeister A4VG71 Hydraulic Pump

Putzmeister A4VG71 Hydraulic Pump is a variable displacement axial piston hydraulic pump that serves as a main hydraulic pump in suitable Putzmeister underground machines. This item is indicated by Putzmeister with the code of E98989 under the designation of A4VG71 DA2D2. Its displacement capacity is 71 cm³ per revolution and allows the formation of a controlled bidirectional flow in a closed-circuit drive system.

The pump has an axial piston rotary group with the swashplate mechanism. Changing the swashplate inclination affects the length of the piston stroke and regulates the volume of the hydraulic oil pumped in one revolution of the shaft. Moving the swashplate past the neutral position changes the flow direction of oil and makes it possible to drive the connected hydraulic drive in both directions without using additional directional valve in the main hydraulic circuit.

In a closed hydraulic circuit, oil moves directly between the hydraulic pump and the connected hydraulic drive. The system of charging oil is responsible for the replacement of the oil that leaks in the process and also serves for cooling and pressure compensation in the low-pressure side of the circuit.

The DA2D2 code indicates that this is the particular control configuration installed in the Putzmeister part E98989 pump. A4VG71 pumps come with various controllers, shafts, mounting flanges, through-drive designs and hydraulic port locations. Thus, another A4VG71 pump cannot be considered as interchangeable simply due to similar nominal displacement. All the nameplate data and installation features should coincide with the original one.

Rexton Hydraulic offers A4VG71 Putzmeister hydraulic pumps, suitable spare parts and hydraulic pump repair service all over India. Our repairing process includes disassembling, cleaning, examination of the rotating group, replacement of worn-out parts, DA2D2 controller servicing, accurate reassembling and testing. Customers should provide pump nameplate data, Putzmeister part number E98989, machine type, direction of rotation, shaft, flange, ports and controller data prior ordering or sending a pump for repairing.