HENGYUHANG Plunger Pump 121-4311 – Perfect Replacement for CAT Hydraulic Plunger Pump
The CAT hydraulic plunger pump plays a vital role in high-pressure hydraulic systems used in construction machinery, mining equipment, and heavy industrial applications. Known for durability and stable performance, the CAT hydraulic plunger pump has become a standard component in many CAT machines.
To provide a reliable and cost-effective alternative, HENGYUHANG plunger pump 121-4311 is designed as a perfect replacement for CAT hydraulic plunger pump, offering OEM-level compatibility, stable performance, and long service life.
Functions of HENGYUHANG Plunger Pump 121-4311
As a direct replacement for CAT hydraulic plunger pump, the HENGYUHANG plunger pump 121-4311 provides:
High-pressure hydraulic oil output
Smooth and stable flow performance
Efficient energy transmission
Low internal leakage
Reliable operation under continuous heavy-duty conditions
| Parameter | Specification |
|---|---|
| Product Type | Axial Hydraulic Plunger Pump |
| Replacement For | CAT Hydraulic Plunger Pump |
| CAT Part Number | 121-4311 |
| Rated Pressure | Up to 35 MPa |
| Maximum Pressure | Up to 40 MPa |
| Flow Performance | High efficiency, stable flow |
| Operating Speed | OEM standard |
| Working Medium | Hydraulic Oil |
| Operating Temperature | -20°C to +90°C |
| Mounting Interface | Fully compatible with CAT systems |
| Installation Method | Direct replacement, plug-and-play |
| Quality Inspection | 100% pressure and performance tested |
Both the CAT hydraulic plunger pump and HENGYUHANG plunger pump are widely used in:
Construction machinery
Mining equipment
Earthmoving machinery
Industrial hydraulic systems
Agricultural machinery
Heavy-duty mobile equipment
The HENGYUHANG plunger pump is engineered to operate reliably in harsh working conditions.
The CAT hydraulic plunger pump is recognized globally for:
High durability and long service life
Stable pressure and consistent flow output
Proven reliability in extreme working environments
Strong OEM quality standards
These advantages have made CAT hydraulic plunger pumps a trusted choice for many operators.
Despite its strengths, the CAT hydraulic plunger pump also has limitations:
High purchase and replacement cost
Expensive OEM spare parts
Long lead time for original components
Higher maintenance expenses
These issues encourage customers to consider a dependable replacement for CAT hydraulic plunger pump.
The HENGYUHANG plunger pump 121-4311 offers clear advantages:
Designed according to CAT specifications for seamless installation.
Provides the same performance as a CAT hydraulic plunger pump at a more competitive price.
Precision machining ensures consistent output and extended service life.
Fast production and supply help reduce equipment downtime.
Every HENGYUHANG plunger pump undergoes comprehensive testing before shipment.
Choosing the HENGYUHANG plunger pump 121-4311 means choosing a high-quality, economical replacement for CAT hydraulic plunger pump. It helps reduce operating costs while maintaining hydraulic system performance and reliability.
The HENGYUHANG plunger pump 121-4311 is a dependable and cost-effective replacement for CAT hydraulic plunger pump. With OEM compatibility, stable performance, and competitive pricing, it is an ideal solution for construction, mining, and industrial hydraulic applications.
For customers seeking a reliable alternative to the CAT hydraulic plunger pump, HENGYUHANG plunger pump 121-4311 is the right choice.

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