K3VL80/B-1RRKS-L1 Kawasaki Axial Piston Pump 80cc 320bar

Product Overview

The K3VL80/B-1RRKS-L1 is a high-performance open-circuit swash-plate axial piston pump from the Kawasaki Precision Machinery (KPM) K3VL series. With a displacement of 80 cm³/rev, continuous pressure rating of 32 MPa and peak pressure of 35 MPa, it is engineered for demanding mobile and industrial applications. The rotating group is based on the proven K3V design, delivering full dimensional and functional interchangeability with genuine Kawasaki units. Every pump undergoes 100% simulated operating-condition testing to guarantee volumetric efficiency, pressure stability and service life equivalent to OEM standards.

Technical Specifications 

• Model: K3VL80/B-1RRKS-L1
• Displacement: 80 cm³/rev
• Rated pressure: 32 MPa (320 bar)
• Peak pressure: 35 MPa (350 bar)
• Maximum self-priming speed: 2400 rpm
• Maximum boosted speed: approx. 3000 rpm
• Minimum operating speed: 600 rpm
• Control type: Load-sensing + pressure cut-off (L1, LS bleed blocked)
• Direction of rotation: Clockwise (viewed from shaft end)
• Port configuration: Rear ports
• Mounting & shaft: SAE flange with SAE straight-key shaft (1.25″ bore × 5/16″ key)
• Approximate weight: 35 kg
• Case fill capacity: approx. 0.8 L
• Operating temperature range: -20 °C to +95 °C
• Viscosity range: 10 to 1000 cSt
• Recommended cleanliness: ISO 4406 18/15

Key Technical Advantages

1. Precision swash-plate and hydrostatic pillow bearing design derived from the K3V series significantly reduces pressure pulsation and noise while achieving peak overall efficiency above 90%.
2. Reinforced main bearings and valve plate combined with NBR body seals and Viton shaft seal provide outstanding durability under continuous high-pressure operation.
3. L1 load-sensing control with pressure cut-off precisely matches flow to system demand, prevents overloading and reduces energy consumption and heat generation.
4. Compact rear-port configuration and SAE mounting interfaces ensure drop-in interchangeability, minimizing downtime and retrofit costs when replacing original Kawasaki pumps.

Application Areas

• Construction machinery (excavators, wheel loaders, mobile cranes)
• Agricultural equipment (large tractors, combine harvesters)
• Industrial systems (injection molding machines, presses, metallurgical equipment)
• Marine and mobile hydraulic power units requiring reliable medium-to-high pressure open-circuit performance

Expert Maintenance Tips

1. Always pre-fill the pump case with clean hydraulic fluid and bleed air from the highest drain port before start-up to avoid dry-running damage.
2. Maintain suction pressure ≥ 0 MPa (absolute ≥ 0.1 MPa) under steady-state conditions to preserve self-priming capability and prevent cavitation wear.
3. Monitor case drain pressure (continuous ≤ 1 bar, peak ≤ 4 bar); elevated drain pressure is a primary cause of premature shaft-seal failure.
4. Use high-quality anti-wear hydraulic oil and keep system cleanliness at or better than ISO 4406 18/15. Replace filter elements and oil after the first 50–100 operating hours for maximum service life.