455-7978 Hydraulic Piston Pump: High-Efficiency Variable Displacement | Stable Hydraulic Output | Precision Replacement for Cat Equipment

The 455-7978 is a variable displacement piston pump designed for the hydraulic systems of Caterpillar (Cat) construction machinery. By regulating hydraulic fluid flow and pressure, this model delivers stable, efficient hydraulic power to the equipment's actuators, making it ideal for maintenance, hydraulic system replacement, and aftermarket sourcing. According to official Cat specifications, the 455-7978 is compatible with Cat 427F2, 428F2, and 434F2 backhoe loaders.

 

 

1. Variable Displacement Design for Flexible Hydraulic Control

The 455-7978 variable displacement piston pump adjusts flow and pressure based on system demands, enhancing both operational efficiency and control performance.

 

2. Built for Heavy-Duty Machinery and High-Load Conditions

Designed for high-pressure hydraulic systems, this piston pump provides reliable power to backhoe loader work tools, meeting the requirements of continuous operations such as excavating, loading, and material handling.

 

3. Cost-Effective Alternative for the Global Aftermarket

This aftermarket replacement hydraulic piston pump is suitable for equipment maintenance, pump replacement, and the supply of spare parts for overseas construction machinery, offering distributors, repair shops, and equipment owners greater procurement flexibility.

 

OEM Brand: Caterpillar / Cat

OEM Part Number: 455-7978 / 4557978

Product Name: Variable Displacement Piston Pump / Hydraulic Piston Pump

 

For overseas customers seeking a replacement for the Cat 455-7978 (hydraulic pump/piston pump), this model serves as an excellent aftermarket alternative. Please note: A replacement part does not imply authorization from Caterpillar or an OEM relationship; before installation, please verify compatibility based on the equipment serial number, pump mounting dimensions, port connections, and hydraulic system configuration.

 

Equipment Compatibility and Application

 

Part number 455-7978 is primarily used for the following Caterpillar backhoe loaders:

 

Cat 427F2 Backhoe Loader

Cat 428F2 Backhoe Loader

Cat 434F2 Backhoe Loader

 

Compatible models listed on the official Cat parts page include the 427F2, 428F2, and 434F2. As specific equipment configurations and serial numbers may affect fitment, it is recommended to verify the machine's serial number and the original pump part number prior to purchase.

 

This hydraulic pump is designed for the hydraulic power systems of construction machinery and is suitable for applications such as excavating, loading, material handling, and general construction site operations. The 455-7978 replacement hydraulic pump is suitable for:

 

- Construction machinery parts distributors

- Caterpillar equipment repair companies

- Hydraulic pump and system repair specialists

- Construction machinery rental companies

- Overseas machinery spare parts importers

- OEM/Aftermarket parts suppliers

- Construction machinery end-users

 

455-7978 hydraulic pump

4557978 piston pump

455-7978 replacement

Caterpillar 455-7978 replacement pump

Cat 455-7978 hydraulic piston pump

455-7978 variable displacement piston pump

427F2 hydraulic pump

428F2 hydraulic pump

434F2 hydraulic pump

 

If you are looking for a 455-7978 replacement from China, a 4557978 hydraulic piston pump, or a hydraulic pump for Caterpillar 427F2 / 428F2 / 434F2 models, please provide the equipment model, serial number, or a photo of the old pump. We can verify compatibility and provide a B2B bulk quote.