Cylinder Block: The cylinder block is a critical component of the hydraulic pump responsible for converting mechanical power into hydraulic energy.
When replacing the cylinder block, it is essential to consider the displacement volume, which determines the pump's flow rate. The displacement volume is typically measured in cubic centimeters (cc) or cubic inches (in³) and should match the original cylinder block for proper functioning.
Valve Plate: The valve plate regulates the flow of hydraulic fluid within the pump. When selecting a replacement valve plate, ensure that it is compatible with the pump's series and model number. Additionally, consider the valve plate's configuration, which can vary depending on the specific application requirements. Common valve plate configurations include port plate, center spring plate, and control plate.
Piston Shoe and Retainer Plate: The piston shoe and retainer plate assembly is responsible for generating the reciprocating motion within the pump. When replacing these components, it is important to match the piston shoe's dimensions and design, including the type of shoe (slipper or swash plate) and the number of shoes. The retainer plate should also be compatible with the piston shoe assembly.
Drive Shaft: The drive shaft transmits power from the prime mover to the hydraulic pump. Replacement drive shafts should match the original shaft's dimensions, including length, diameter, and keyway specifications. Additionally, consider the shaft's rotational direction and the type of coupling used to connect it to the prime mover.
Bearings and Seals: Bearings and seals play a vital role in maintaining the hydraulic pump's integrity and preventing leakage. When selecting replacement bearings, consider the type (ball or roller), dimensions, load capacity, and rotational speed rating. Similarly, replacement seals should match the original seals' dimensions and material specifications to ensure a proper fit and seal.
Housing and Port Connections: In some cases, the pump's housing or port connections may require replacement due to damage or wear.
Replacement housings should match the original housing's specifications in terms of dimensions, mounting options, and port sizes. When replacing port connections, ensure compatibility with the pump's fluid compatibility (such as NPT or SAE).
Control Options: Depending on the specific application requirements, the Rexroth A2FO series hydraulic pump may offer various control options. These can include manual control, solenoid control, or proportional control. When replacing control components, ensure compatibility with the pump's control mechanism and the overall hydraulic system's requirements.