Rexroth A4VSG Series 1000cc Axial Piston Variable Hydraulic Pump for Closed Circuit Hydrostatic Transmission

Rexroth A4VSG Closed Circuit Axial Piston Variable Pump

Key Features

1. Heavy-duty high-pressure structure, long service lifespan, low operating noise

2. Nominal pressure:350 bar, Maximum peak pressure:400 bar

3. 1000cc/rev large displacement, high power-to-weight ratio

4. Drive shaft withstands axial & radial loads; with visual swivel angle indicator

5. Modular design, through-drive available for stacking extra pumps

6. Fast response control; compatible with HF hydraulic fluid under reduced operating parameters

7. Metric version, closed circuit hydrostatic transmission

Technical Parameters

Specifications:

Application Scenarios

· Large mining equipment hydrostatic drive

· Heavy-duty industrial test bench

· Marine hydraulic propulsion & winch system

· Large material handling equipment

· Heavy metallurgical machinery

· Large tracked heavy transport vehicle

· Big industrial closed-loop hydraulic transmission system

Competitive Advantage:

1. A4VSG1000 features a large displacement of 1000cc with open circuit design. It can maintain high-pressure and large-flow output for a long time and has excellent overload resistance, suitable for long-duration high-intensity heavy-load working conditions such as large mining equipment and heavy hydraulic presses.

2. The pump adopts thickened high-strength housing, and the core friction pairs are made of wear-resistant special alloys. It can withstand impact loads and adapt to harsh site environments including mine dust, high temperature and poor oil quality, extending the overall service life.

3. The variable mechanism delivers high control accuracy with smooth flow adjustment and small pressure fluctuation. The supporting spare parts system in the market is mature. Original and replacement parts are readily available for on-site maintenance, reducing huge losses caused by downtime of large equipment.

The Analysis For Rexroth A4VSG Piston Pump Common Breakdown: 

1. Insufficient output flow and slow & weak movement of large equipment. Wear of cylinder block and piston assembly or scratches on the valve plate will sharply increase internal leakage of the pump, making it fail to reach rated flow. It directly slows down the actuators of large hydraulic presses and mining machines and greatly reduces production efficiency.

2. Severe vibration and abnormal noise of pump body. The main triggers are heavily contaminated hydraulic oil, air entering suction pipeline and main bearing damage. Impurities and cavitation continuously impact precision internal parts. Vibration and noise worsen gradually. In serious cases, the pump core may rupture and cause hydraulic system failure of the whole machine.

3. Failure of variable adjustment, pressure and flow cannot be adjusted as required. Stuck variable control spool and fatigue failure of control spring will disable displacement adjustment. The pump cannot adjust output with load changes, which easily causes unstable system pressure and soaring energy consumption and fails to meet the process requirements of heavy equipment.