Putzmeister A4FO28 Hydraulic Pump
Putzmeister A4FO28 Hydraulic Pump
Putzmeister A4FO28 Hydraulic Pump is a fixed displacement axial piston pump used in open-circuit boom hydraulic systems. Its compact high-pressure construction provides steady flow in proportion to drive speed. The Putzmeister 531191 configuration is identified as A4FO28/32L-NS.
- Equipment Brand: Putzmeister
- Pump Model: A4FO28
- Putzmeister Reference: 531191
- Known Configuration: A4FO28/32L-NS
- Pump Type: Fixed displacement axial piston pump
- Design: Swashplate
- Hydraulic Circuit: Open circuit
- Nominal Displacement: 28 cm³/rev
- Typical Application: Boom hydraulic circuit in Putzmeister concrete pumps
Share Product:
Putzmeister A4FO28 Hydraulic Pump is a fixed displacement pump with an axial piston design that serves as a part of the boom hydraulic circuit in Putzmeister concrete pump machines. Putzmeister lists this pump by the part number 531191 and configuration A4FO28/32L-NS. The pump provides the nominal displacement of 28 cm³/revolution and is made for open circuit hydraulic application.
Opposed to the variable displacement pump, the A4FO28 does not feature changeable swashplate angle. The output volume of the hydraulic oil is constant at any revolution of the shaft because there is no change of the swashplate angle. The output volume of the pump varies directly proportional to the drive speed of the pump.
Putzmeister A4FO28 hydraulic pump works on the principle of axial piston rotary group in swash plate design. During the rotation of the drive shaft the pistons inside the cylinder block move and transport the hydraulic oil from the inlet to pressure outlet. Open circuit system takes hydraulic oil from the reservoir and sends it back to the tank after the oil passes the hydraulic functions of the machine.
The designation A4FO28/32L-NS includes all relevant configuration information. The “L” signifies left hand rotation, while the rest of the designation defines the specific series and connection arrangement. A replacement pump must not be chosen based on the A4FO28 designation alone. There must be matching rotation, shaft size, mounting flange, hydraulic connections and installation interface to the pump being replaced.
Rexton Hydraulic offers Putzmeister A4FO28 hydraulic pumps, internal components that fit the pump and hydraulic pump repair services all over India. Pump repair may involve disassembly, cleaning, dimensional inspection, replacing worn out parts, accurate reassembly and testing of the repaired unit. Clients need to send us the Putzmeister part number 531191, pump designation, entire nameplate, machine model and installation details. Contact us today to get quoted.
