Putzmeister A7V28 Hydraulic Pump
Putzmeister A7V28 Hydraulic Pump
Putzmeister A7V28 Hydraulic Pump is a variable displacement axial piston pump with a bent-axis construction for open-circuit operation. It provides adjustable hydraulic flow for boom functions on compatible Putzmeister machines.
- Equipment Brand: Putzmeister
- Pump Model: A7V28
- Putzmeister Reference: 276120002
- Known Configuration: A7V28(24)DR
- Pump Type: Variable displacement axial piston pump
- Design: Bent axis
- Hydraulic Circuit: Open circuit
- Nominal Series Size: 28 cm³/rev
- Typical Application: Boom hydraulic circuit
Share Product:
Putzmeister A7V28 Hydraulic Pump is a variable displacement axial piston pump intended for use in the boom hydraulic circuit of compatible Putzmeister concrete pumps. Putzmeister refers to this pump as part 276120002 A7V28(24)DR. In spite of the general designation implying that the pump is of size 28 cm³, this specific Putzmeister model is calibrated for displacement of about 24 cm³ per revolution.
Putzmeister A7V28 is characterized by axial tapered pistons, which are set into a bent-axis rotary body. Being an angled type of pump, it is capable of changing displacement depending on the positioning of the internal mechanism; therefore, providing variable hydraulic flow compared to the steady flow generated by a fixed displacement pump. Flow of the pump depends proportionally on the drive speed and chosen displacement.
A7V28 is designed for open circuit operation, where it pumps hydraulic fluid from the reservoir and feeds it into the boom control circuit, and then the fluid goes back to the tank. The pressure controller DR regulates the pump operation in accordance with necessary pressure level. Once the pressure reaches its preset point, the controller lowers the displacement of the pump to prevent overfeeding of hydraulic fluid.
For part number 276120002, Putzmeister refers to A7V28 nomenclature, while other technical specifications and spare parts lists may refer to the newer A7VO series for this particular line of bent-axis variable displacement pump. Thus, the Putzmeister part number and nameplate will have to be used primarily to identify the pump.
We offer Putzmeister A7V28 hydraulic pumps, replacement and repair services throughout India. Rexton Hydraulic can perform disassembly and cleaning, check the bent-axis rotary unit, replace worn-out parts, service the DR controller, and then put together and test the pump. Customers need to provide complete nameplate information, Putzmeister part number 276120002, machine model, shaft size, flange, ports and rotation, which is indicated by letter "L".
