K3VL45-B-1NRSM-PO Hydraulic Pump for Construction Machinery

product parameters

Part No：K3VL45-B-1NRSM-PO，K3VL45/B
Theoretical Displacement：45 cc/rev; max theoretical flow 135 L/min at rated speed
Applicable Equipment：Heavy construction machinery, excavators & earthmoving machines with matching hydraulic system
Material：High strength alloy cast iron housing, carburized alloy steel piston, copper alloy slipper retainer, DLC coated valve plate
Surface Treatment：Manganese phosphate anti-rust coating, ultrasonic deep cavity cleaning, thoroughly remove casting sand, metal scraps and burrs inside flow channel
Control Mode：Load sensing control, torque limiting function
Rated Working Pressure：32 MPa
Max Instantaneous Peak Pressure：35 MPa
Feature：Low pressure pulsation, high volumetric efficiency, sensitive load response, low internal leakage, low vibration & noise, good contamination resistance, compact structure, Kawasaki K3VL series design
Working Temperature：-20℃ ~ +115℃
Package：Independent anti-rust packing + Standard export carton
Storage suggestion：Keep dry, avoid moisture, rust and collision, indoor constant temperature storage, stay away from corrosive gas

• High-strength alloy cast iron housing. Integral casting plus stress relief annealing treatment, excellent structural rigidity and shock resistance. It stably withstands fluctuating hydraulic pressure and alternating impact loads under mining and earthmoving working conditions, maintaining steady flow output under continuous heavy load.
• Ultra-precision ground internal friction pairs. Pistons, slippers and DLC coated valve plate are machined to tight tolerance. High volumetric efficiency and greatly reduced internal leakage. Load sensing control responds rapidly to load changes, automatically adjusting pump output to save engine power and reduce fuel consumption.
• Good resistance to contaminated hydraulic oil. Optimized internal flow channel design reduces risk of abrasion caused by fine solid particles. Manganese phosphate anti-rust coating protects housing against dust, mud and humidity in harsh field environments, slowing down wear and cavitation, extending service cycle.
• Safeguards engine, main control valve and entire hydraulic system. Adaptive load output provides stable digging power, protects downstream hydraulic components, reduces secondary damage risk of cylinders, pipelines and seals.
• Direct replacement with excellent cost performance. All mounting dimensions, port layout and spline specs match OE specifications. No cutting, drilling or modification required during installation. Fast on-site replacement. Reliable aftermarket spare part for overhaul and routine maintenance.

FAQ 

Q1: What machine fits K3VL45-B-1NRSM-PO hydraulic pump? Can it substitute other part numbers?
A1: It is Kawasaki K3VL45/B series main pump for heavy construction machinery, applicable for excavators equipped with K3VL45 hydraulic system. It cannot be universally used on all machines. Incorrect model selection may lead to insufficient digging power, pressure instability and premature pump failure. Please double-check OEM part number and machine model before purchase.

Q2: What inspections are carried out before shipment?
A2: Every pump is 100% inspected on hydraulic test bench, including pressure endurance test, full-range flow characteristic test, load-sensing response test, internal & external leakage inspection and dimensional verification. Simulated load test is available to confirm stable working performance after installation. Test reports can be provided upon request.

Q3: What’s the warranty and what’s excluded?
A3: 12-month warranty under correct installation, clean hydraulic oil and normal operation. Warranty does NOT cover damage caused by contaminated oil, particle jamming, cavitation, overpressure, wrong piping and improper maintenance.

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