A4VG90EP3 Axial Piston Hydraulic Pump for Railway Construction Machinery

The A4VG90EP3 high-pressure axial piston hydraulic pump is a variable displacement pump engineered exclusively for railway construction machinery. With a maximum speed of 3000 rpm and robust design, it delivers consistent hydraulic power under heavy-duty conditions. Its efficient closed-circuit operation, high-pressure capability, and long service life make it the preferred choice for critical railway engineering equipment.

Applications

The A4VG90EP3 is designed only for railway construction machinery, including:

• Railway track laying machines

• Railway maintenance vehicles

• Hydraulic-powered tamping machines

• Ballast regulators and rail alignment systems

Advantages

• High Efficiency: Variable displacement design optimizes performance while reducing energy consumption.

• High Pressure Output: Rated up to 350 bar, with overflow pressure reaching 445 bar, suitable for heavy-duty railway applications.

• Durability: Constructed from alloy steel and aluminum components for long service life.

• Low Noise: Reduced noise design enhances operator comfort in railway construction environments.

• Reliable Control: Equipped with EP3 electronic proportional control for precise flow adjustment.

Technical Specifications

Manufacturing Process

1. Material Selection – High-strength alloy steel and aluminum components.

2. Precision Machining – CNC machining ensures dimensional accuracy.

3. Heat Treatment – Increases hardness and wear resistance.

4. Assembly & Testing – Each unit undergoes high-pressure and leakage tests.

5. Surface Protection – Anti-rust coating applied to critical areas.

Usage Instructions

• Fill the casing with clean hydraulic oil before operation.

• Maintain oil cleanliness at NAS class 9 or better.

• Avoid strong impacts on the transmission shaft during transportation.

• Prevent hydraulic oil from contaminating external pump surfaces.

• Regularly monitor system pressure and replace filters as needed.

After-Sales Service

• Warranty: 12 months from delivery date.

• Technical Support: Guidance on installation and commissioning.

• Spare Parts: Genuine components available for fast replacement.

• Repair Service: Professional maintenance teams support global customers.

FAQ

Q1: Can the A4VG90EP3 be used outside railway machinery?
A1: No. This model is specifically designed only for railway construction machinery.

Q2: How often should the hydraulic oil be replaced?
A2: Oil replacement intervals depend on operating conditions but should follow NAS level cleanliness requirements.

Q3: What type of control system does it use?
A3: It uses an EP3 electric proportional control (DC12V) for precise output regulation.