7081W04390 Hydraulic Main Pump for Komatsu HM400 Dump Truck | GP Pump Replacement

Introducing the 7081W04390 Hydraulic Main Pump for Komatsu Mining Trucks
The 7081W04390 Hydraulic Main Pump is a premium GP replacement component specifically engineered for Komatsu HM400 series dump trucks. This heavy-duty hydraulic main pump delivers exceptional power, reliability, and operational efficiency for demanding mining and quarry applications. Manufactured to meet Komatsu’s exact specifications, this main pump ensures optimal hydraulic system performance under extreme working conditions.

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

HM400 Series Dump Trucks:

• Komatsu HM400-1

• Komatsu HM400-2

• Komatsu HM400-3

• Komatsu HM400-1A0

• Komatsu HM400-2A0

• Komatsu HM400-3A0

• Komatsu HM400-1B0

• Komatsu HM400-2B0

• Komatsu HM400-3B0

• Komatsu HM400-1C0

• Komatsu HM400-2C0

• Komatsu HM400-3C0

Additional Mining Configurations:

• High-altitude operation versions

• Extreme temperature variants

• Heavy-duty mining specifications

• Quarry operation models

• Extended service packages

This unit serves as a direct replacement for part numbers 7081W04390 and 708-1W-04390, ensuring perfect fitment and performance compatibility with all HM400 series dump trucks.

Key Features and Benefits

• Mining-Grade Construction: Built with reinforced materials to withstand extreme haulage conditions

• Precision Engineering: Manufactured to exact Komatsu specifications for seamless integration

• Enhanced Efficiency: Optimized hydraulic flow design ensures maximum power output

• Superior Durability: Advanced sealing technology protects against contamination and wear

• Smooth Operation: Precision-balanced components minimize vibration and noise

• Corrosion Resistance: Special coatings protect against mining environment damage

• Easy Installation: Direct OEM replacement design reduces downtime

• Temperature Resilience: Consistent performance in extreme mining conditions

Technical Specifications

• Part Number: 7081W04390

• Alternative Part Number: 708-1W-04390

• Type: Hydraulic Main Pump (Piston Pump)

• Maximum Pressure: 35 MPa (350 bar)

• Flow Capacity: 185 L/min

• RPM Range: 1800-2200

• Port Connections: SAE standard fittings

• Mounting Pattern: Direct bolt-on compatibility

• Weight: 68 kg

• Material: High-grade cast iron and steel components

Performance Advantages

• 22% improved efficiency over standard replacement pumps

• 28% reduction in operational noise levels

• Enhanced contamination resistance for mining environments

• Optimized for heavy-duty haulage cycles

• Stable hydraulic pressure across all operating conditions

• Extended service life in demanding applications

Installation and Maintenance

• Direct replacement requiring no modifications

• Comprehensive installation guide included

• Recommended service intervals: 2,000 operating hours

• Compatible with Komatsu original hydraulic fluids

• Easy access to service points for maintenance

• Mining-specific maintenance protocols

Why Choose Our 7081W04390 Hydraulic Main Pump?

• Perfect Compatibility: Exact OEM replacement ensures no fitment issues

• Mining Application Expertise: Specifically designed for HM400 dump truck operations

• Quality Assurance: Rigorous testing under simulated mining conditions

• Durability: Premium materials for extended service life in harsh environments

• Warranty Protection: Comprehensive coverage against defects

• Performance Guarantee: Matches or exceeds original equipment performance

Frequently Asked Questions

1. Is this pump compatible with all HM400 variants?
   Yes, it is designed for all series including A0, B0, and C0 versions.

2. What’s the difference between 7081W04390 and 708-1W-04390?
   These are alternative part numbers for the same genuine Komatsu component.

3. How does this pump improve dump truck performance?
   It ensures consistent hydraulic pressure for reliable dumping operations and vehicle control.

4. What warranty coverage is provided?
   Comprehensive warranty against manufacturing defects.

5. Are installation instructions included?
   Yes, detailed installation guidelines are provided with each unit.

Maintenance Recommendations

• Regular hydraulic fluid analysis every 500 hours

• System pressure checks during routine maintenance

• Filter replacement according to mining operation specifications

• Visual inspection for leaks in mining conditions

• Proper storage in clean, dry conditions

• Special attention to contamination control in mining environments

Conclusion
For Komatsu HM400 dump truck owners and maintenance professionals in mining operations, the 7081W04390 Hydraulic Main Pump offers unmatched reliability and performance. This GP replacement unit ensures your equipment maintains optimal hydraulic performance, protecting your investment and maximizing productivity in demanding mining applications.