K3V Hydraulic Pump

First, Core Definition and Function

The K3V hydraulic pump is an axial piston pump developed by Kawasaki Heavy Industries in Japan, specifically designed to provide high-pressure power for construction machinery (such as hydraulic excavators, concrete pump trucks, cranes, etc.). Its core functions include:

1. Energy Conversion: Converts mechanical energy from the engine into hydraulic energy to drive actuators such as the boom, arm, and bucket.

2. Pressure Control: Supports high-pressure output of 30-35MPa, suitable for heavy-duty operating conditions.

3. Flow Regulation: Implements flow distribution as needed through variable control technology, enhancing energy efficiency.

Second, Technical Characteristics and Advantages

1. Structure and Working Principle: 

Piston Reciprocating Motion: The engine drives the drive shaft to rotate, and the connecting rod pushes the piston to move reciprocally within the cylinder, completing oil suction and discharge. 

Swash Plate Variable Control: The swash plate's oscillation can change the pump's displacement, achieving flow regulation. 

Distribution Plate Design: The stationary distribution plate uses a kidney-shaped hole to manage oil suction and discharge, ensuring high sealing efficiency.

2. Performance Parameters: 

Displacement Range: Offers a variety of displacement options from 63-280cc to suit different tonnage excavators (e.g., K3V63DT is suitable for 12-15 ton models, K3V180DT is for 30 ton models). 

Pressure Level: Continuous rated pressure of 350bar, with peak pressure reaching up to 400bar. 

Speed Range: Supports wide speed adjustments to meet different operating condition requirements.

3. Technical Advantages:

Efficient and Energy-Saving: Adopts advanced hydraulic technology, with energy efficiency improved by more than 15% compared to gear pumps.

Stable and Reliable: Subjected to strict quality control, the failure rate is below 0.3%, with a lifespan of up to 8000 hours.

Easy Maintenance: Compact structure and modular design facilitate maintenance and parts replacement.

Third, Applications and Case Studies:

1. Typical Applications:Hydraulic Excavators: Compatible with brands such as Caterpillar, Kato, Volvo, Liugong, Hyundai, etc.

Construction Machinery: Concrete pump trucks, cranes for complex terrains, drive equipment for well framework supports, crushers, crawler drilling rigs, etc.

2. Typical Cases:Hyundai R300-5 Excavator: Uses K3V140DT main pump, with stable quality and a 20% improvement in operational efficiency.

Volvo 360 Excavator: Compatible with K3V180DT-9N main pump, displacement of 180cc, offering faster and more coordinated movements.

Fourth, Selection and Maintenance Guidelines

1. Key Points for Selection:

Tonnage Matching: For 12-15 ton models, choose K3V63DT; for 20-22 ton models, choose K3V112DT; for 30 ton models, choose K3V180DT.

Working Condition Adaptation: For frequent heavy load conditions, prioritize variable pumps; for light load conditions, fixed pumps can be used.

Brand Compatibility: Ensure that the main pump matches with the engine, hydraulic valves, and other components to avoid power waste.

2. Key Points for Maintenance:

Daily Checks: Inspect oil level and quality daily; keep oil temperature ≤ 80°C, and replace hydraulic oil every 2000 hours.

Seal Inspection: Check the pump body joint surfaces, shaft seals, and pipeline joints daily to prevent leakage.

Abnormal Noise Monitoring: Observe for any metallic friction sounds within 3-5 seconds after starting; listen for periodic knocking sounds during full-load operation.

Kawasaki K3V pump

Kawasaki K3V110 parts