Rexroth A11VLO Series 260cc Axial Piston Variable Pump EP6D Electric Proportional Control Open Circuit

Rexroth 350Bar High Pressure Heavy-Duty Main Pump for Large Excavator & Mining Machinery

Key Features

1. Swash plate axial piston structure, EP6D electric proportional control

2. Displacement:260 cc/rev, dedicated for open hydraulic circuit

3. Nominal pressure: 350 bar (35MPa), Max peak pressure:400 bar (40MPa)

4. Built-in centrifugal impeller charge pump, strong anti-cavitation & good suction

5. Stepless electronic flow adjustment via proportional signal

6. Heavy-duty reinforced cast iron housing, high shock resistance

7. Through-drive design for multi-pump combination

8. High power density, high volumetric efficiency under heavy load

Technical Parameters

Specification:

Application Scenarios

· Large hydraulic excavator main pump

· Rotary drilling rig / Piling machinery

· Mining & underground excavation equipment

· Crawler crane heavy-duty hydraulic system

· Concrete pump truck

Competitive Advantage:

1. This Rexroth A11VLO260EP6D/11R-N2D12N00VH-S adopts EP electro-proportional control. It can adjust flow steplessly via electric signals with fast response and high precision, easy to coordinate with the machine ECU system. It is ideal for heavy-duty equipment requiring precise speed control, such as large excavators and heavy shredders.
2. As a high-pressure A11VLO series pump, its rated pressure is 350 bar and peak pressure reaches 400 bar. It features robust structure and strong overload resistance with high power density. It can continuously withstand shock loads and perform stably in harsh working conditions like mining and solid waste recycling.
3. It supports through-drive design to connect additional pumps for multi-pump combinations, achieving high integration and saving installation space. With standard interface and large market inventory, spare parts are easy to source for equipment modification and maintenance.

The Analysis For Rexroth A11VLO Opended Circuit Piston Pump Common Breakdown :

1. Failed flow regulation, the pump speed does not respond to electronic signals. It is mainly caused by burnt proportional coil, stuck spool or abnormal pilot pressure. It will lead to uncontrollable machine movement and fail to adjust speed as required.
2. The pump cannot build enough pressure and lacks power under heavy load. It usually results from severe internal leakage caused by worn pistons and valve plate, or damaged main control valve. The heavy machine loses load capacity and cannot finish crushing or digging work.
3. Severe vibration and continuous overheating during operation. Common causes include contaminated hydraulic oil, air ingression in suction line or worn bearings. Persistent heat and vibration accelerate the aging of seals and internal friction pairs, shorten service life and may cause pump seizure.