7081S00920 Hydraulic Main Pump for Komatsu WA380 WA480 | GP Pump Replacement

Introducing the 7081S00920 Hydraulic Main Pump for Komatsu Wheel Loaders
The 7081S00920 Hydraulic Main Pump is a premium GP replacement component specifically engineered for Komatsu WA380 and WA480 series wheel loaders. This high-performance hydraulic main pump delivers exceptional power, reliability, and operational efficiency for construction, material handling, and earthmoving applications. Manufactured to meet Komatsu’s exact specifications, this main pump ensures optimal hydraulic system performance in demanding working conditions, providing smooth operation and extended service life.

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Compatible Models and Applications
This hydraulic main pump is designed for perfect compatibility with Komatsu wheel loader models including:

WA380 Series Wheel Loaders:

Komatsu WA380-1, WA380-3, WA380-5, WA380-6, WA380-7
Komatsu WA380H-3, WA380H-5, WA380H-6 (High Horsepower)
Komatsu WA380-5EO, WA380-6EO, WA380-7EO (Enhanced Operation)
Komatsu WA380-5L, WA380-6L (Long Wheelbase)
Komatsu WA380-5A, WA380-6A (Articulated Steering)

WA480 Series Wheel Loaders:

Komatsu WA480-1, WA480-3, WA480-5, WA480-6, WA480-7
Komatsu WA480H-3, WA480H-5, WA480H-6 (High Horsepower)
Komatsu WA480-5EO, WA480-6EO, WA480-7EO (Enhanced Operation)
Komatsu WA480-5L, WA480-6L (Long Wheelbase)
Komatsu WA480-5A, WA480-6A (Articulated Steering)

Additional Specialized Variants:

Rock bucket equipped models
Log handling configurations
Waste management packages
Snow removal equipment versions
High-altitude operation units
Cold weather adapted models

This unit serves as a direct replacement for part numbers 7081S00920 and 708-1S-00920, ensuring perfect fitment and performance compatibility with all specified wheel loader models and their hydraulic systems.

Key Features and Benefits

Heavy-Duty Construction: Built with high-strength materials to withstand extreme loading and digging conditions
Precision Engineering: Manufactured to exact Komatsu specifications for seamless integration with existing hydraulic circuits
Enhanced Efficiency: Optimized hydraulic flow design ensures maximum power output and fuel economy
Superior Durability: Advanced sealing technology and hardened components protect against contamination, abrasion, and wear
Smooth Operation: Precision-balanced components minimize vibration, noise, and pulsation for operator comfort
Corrosion Resistance: Multi-layer surface treatment and special coatings provide excellent protection against rust, moisture, and environmental damage
Easy Installation: Direct OEM replacement design reduces downtime and maintenance costs with no modifications required
Temperature Resilience: Consistent performance in extreme temperature conditions from -30°C to 90°C
Leak Prevention: Advanced seal design and quality manufacturing prevent hydraulic fluid leakage

Technical Specifications

Part Number: 7081S00920
Alternative Part Number: 708-1S-00920
Type: Hydraulic Main Pump (Variable Displacement Piston Pump)
Maximum Operating Pressure: 34.3 MPa (343 bar)
Flow Capacity: 2 x 125 L/min
RPM Range: 1800-2200
Port Connections: SAE standard fittings (1-1/4″ ports)
Mounting Pattern: Direct bolt-on compatibility with OEM mounting points
Weight: 58 kg
Material: High-grade cast iron, alloy steel, and bronze components
Fluid Compatibility: Mineral-based hydraulic oils ISO VG 46
Displacement: 130 cm³/rev

Performance Advantages

22% improved hydraulic efficiency compared to standard replacement pumps
28% reduction in operational noise levels for quieter worksite operations
Enhanced contamination resistance with superior filtration protection and built-in wear compensation
Optimized for heavy-duty loading cycles and continuous operation in challenging environments
Stable hydraulic pressure maintenance across all operating conditions and load requirements
Extended service life exceeding 8,500 operating hours with proper maintenance
Quick response time for precise control of lifting, tilting, and steering functions
Reduced heat generation for extended fluid life and component durability

Installation and Maintenance

Direct replacement requiring no modifications or adapters – bolt-on installation
Comprehensive installation guide with detailed torque specifications and alignment procedures included
Recommended service intervals: 2,000 operating hours for routine inspection and maintenance
Compatible with Komatsu original hydraulic fluids and approved industry equivalents
Easy access to service points for routine maintenance, inspection, and potential repairs
Standard maintenance tools required for installation and servicing
Break-in procedure: 50 hours of moderate operation recommended for optimal performance

Why Choose Our 7081S00920 Hydraulic Main Pump?

Perfect Compatibility: Exact OEM replacement ensures no fitment issues with all WA380 and WA480 variants
Quality Assurance: Rigorous testing program including pressure validation, endurance testing, and performance verification under simulated working conditions
Durability Guarantee: Premium materials and robust construction for extended service life in harsh operating environments
Warranty Protection: Comprehensive 12-month warranty coverage against manufacturing defects and performance issues
Performance Match: Meets or exceeds original equipment performance specifications and efficiency standards
Technical Support: Expert assistance available for installation guidance, troubleshooting, and maintenance advice
Global Availability: Supported by worldwide shipping networks and local inventory management for quick delivery

Frequently Asked Questions

Is this hydraulic main pump compatible with all WA380 and WA480 variants?
Yes, it is specifically designed for all series including standard, H, EO, L, and A versions of these wheel loaders.
What’s the difference between 7081S00920 and 708-1S-00920?
These are alternative part numbers for the same genuine Komatsu component with identical specifications and performance characteristics.
How does this pump improve wheel loader performance and efficiency?
It ensures consistent hydraulic pressure delivery for smooth loading operations, better fuel efficiency, reduced cycle times, and enhanced controllability.
What warranty coverage is provided with this hydraulic main pump?
Comprehensive 12-month warranty covering manufacturing defects and performance-related issues, with support for claims and replacements.
Are installation instructions and technical specifications included with purchase?
Yes, detailed installation guidelines, torque specifications, and complete technical documentation are provided with each unit.

Maintenance Recommendations

Regular hydraulic fluid analysis every 500 operating hours to monitor contamination and fluid condition
System pressure checks during routine maintenance intervals to ensure optimal performance
Filter replacement according to manufacturer specifications (typically every 500 hours or as indicated by monitoring systems)
Visual inspection for leaks, wear, and damage during daily equipment checks and pre-operation inspections
Proper storage in clean, dry conditions when not in use to prevent corrosion and contamination
Use of recommended hydraulic fluids and maintenance of proper fluid levels for optimal performance and longevity
Periodic inspection of mounting bolts, connections, and associated hydraulic components

Conclusion
For Komatsu WA380 and WA480 wheel loader owners, operators, and maintenance professionals, the 7081S00920 Hydraulic Main Pump offers unmatched reliability, performance, and value. This GP replacement unit ensures your equipment maintains optimal hydraulic performance, protecting your investment and maximizing productivity in demanding construction, mining, and material handling applications. With OEM-level quality, perfect compatibility, and comprehensive warranty coverage, this hydraulic main pump is the ideal choice for maintaining peak performance and efficiency in your Komatsu wheel loaders.