REXROTH HYDRAULIC PUMP/ MOTOR

REXROTH Hydraulic pump

What's a Excavator Hydraulic Piston Pump?

A hydraulic piston pump is a type of positive displacement pump that uses reciprocating pistons to move fluid. It is commonly used in hydraulic systems to generate high-pressure fluid flow. The pump works by drawing fluid into a cylinder through an inlet valve and then forcing it out through a discharge valve. The piston movement creates a vacuum that draws in the fluid and then pressurizes it as it is forced out. Hydraulic piston pumps are known for their high efficiency, reliability, and ability to handle high-pressure applications.

The excavator hydraulic pump working principle:

The excavator hydraulic pump works by converting mechanical power into hydraulic energy. The pump draws in hydraulic fluid and then pressurizes it, which creates flow. This flow is then used to power the various hydraulic systems on the excavator, such as the boom, arm, and bucket. The hydraulic pump is typically driven by the engine of the excavator and can be either a gear pump or a piston pump.

Reliable Excavator Hydraulic Pump Supplier from China

Liusan global provides both genuine and aftermarket hydraulic pumps, including brands KYB, NACHI, KAWASAKI, etc.

• High efficiency and durability

• Low noise operation

• Compact and lightweight design

• Wide range of displacement options

• High pressure capabilities

• Compatibility with different types of hydraulic fluids

• Easy installation and maintenance

Key Features & Advantages

The Z5V140DTP is built to excel in harsh, high-pressure environments. Its design focuses on several key areas:

High Power Density & Compact Design: The pump employs a dual-pump series layout with a shared drive shaft, which eliminates the need for an external power distributor. This design enhances transmission efficiency, reduces overall weight, and saves valuable installation space, allowing for more compact hydraulic system layouts in large machinery.

Energy Efficiency & Self-Priming: An advanced spherical valve plate and hydraulic balance design ensure smooth cylinder rotation and low friction. This maintains high volumetric and mechanical efficiency even at low speeds, minimizing heat generation and energy loss. A high maximum self-priming speed of 2,160 min⁻¹ delivers robust suction, reducing the risk of cavitation and ensuring a stable oil supply.

Durability & Reliability: The pump features large-capacity, heavy-duty main bearings and a plunger return mechanism that compensates for wear on the slippers. This extends the service life and reduces wear on critical friction components. It is designed to operate reliably under continuous high pressures, offering strong impact resistance and high system durability.

Low Noise Operation: Optimized pressure transition zones on the valve plate, a reinforced housing, and built-in damping features work together to reduce pressure fluctuations and mechanical vibrations. This results in lower noise levels compared to equivalent K3V pumps, enhancing operator comfort and reducing environmental disturbance. 

Versatile & Precise Control: The pump supports mechanical, hydraulic, and electrical control inputs. It is capable of constant-power, pressure-limiting, and load-sensing control logic, allowing for fast and accurate adjustments to flow and pressure. This enables precise execution of complex, multi-function tasks in modern excavators.

Easy Integration & Replacement: Multiple flange, shaft, and control interface options are available. Crucially, its installation dimensions are highly compatible with the classic K3V112DTP pump, allowing for direct upgrades without modifying the host machine, which minimizes retrofitting costs and downtime.