Eaton Vickers 4622 3923 3933 Hydraulic Pump | Concrete Mixer Truck Main Pump | Heavy Duty Piston Pump
| Model Number | 3923-366, 3923-354, 3963-000, 3933-096, 4622-167, 4622-138 |
|---|
Product Description
Designed for the extreme operational demands of concrete mixer trucks, the Eaton Vickers 4622, 3923, and 3933 series axial piston variable displacement pumps from LIC Hydraulic are the industry standard for closed-loop power. These pumps are engineered for high power density and exceptional shock resistance. As a high-standard drop-in replacement, the mounting dimensions and flow characteristics are fully compatible with original Eaton Vickers units. Each pump undergoes 100% simulated load testing before delivery, ensuring maximum reliability during frequent direction changes and high-pressure startups.
Technical Specifications (Bulleted List)
Series Identification: Eaton Vickers Heavy Duty Series (4622 / 3923 / 3933)
Specific Models: 4622-138, 4622-167, 3923-354, 3923-366
Displacement Range: 75.2 cc/rev (39 Series) / 105.5 cc/rev (46 Series)
Rated Pressure: 350 bar (5075 PSI)
Peak Pressure: 420 bar (6090 PSI)
Maximum Speed: 3000 – 3600 RPM
Control Types: Manual Servo Control or Hydraulic Proportional Control
Approx. Weight: 65 kg – 85 kg (Depending on charge pump configuration)
Key Technical Advantages
Bimetallic Valve Plate Technology: Utilizing a high-strength steel-backed bronze alloy valve plate, the pump offers superior wear resistance and anti-seizure properties under high pressure, maintaining high volumetric efficiency.
Integrated Charge Pump System: Features an internal high-performance charge pump that provides cooling flow and ensures reliable priming capability even at high rotational speeds.
Heavy-Duty Swashplate Support: Equipped with oversized cradle bearings designed to absorb the dynamic shock loads of heavy concrete drum reversals, significantly extending fatigue life.
Integrated Valve Manifold: High-pressure relief valves, charge relief valves, and check valves are all integrated into the pump end-cap, simplifying vehicle plumbing and reducing leak points.
Application Areas
Concrete Mixer Trucks: Main drive systems for 6m³ to 16m³ mixing drums.
Road Construction: Traction drive systems for large rollers and pavers.
Marine Engineering: Closed-loop circuits for dredging equipment and deck machinery.
Expert Maintenance Tips
System Flushing: Prior to installation, the closed-loop piping and radiator must be thoroughly flushed; any residual metal debris will cause catastrophic failure to the new piston sets.
Case Priming: The pump housing must be filled with clean hydraulic oil through the drain port before initial startup to prevent dry friction between the slippers and the swashplate.
Temperature Monitoring: Closed-loop oil temperatures should not exceed 85°C (185°F). Excessive heat degrades oil film strength—regularly inspect the cooling fan and charge pressure settings.
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