708-1S-00240 Komatsu Fan Pump D65EX-15 26kg

Product Overview

The 708-1S-00240 is the OEM part number for the hydraulic fan pump used on the Komatsu D65EX-15 series bulldozer. This product is an axial piston pump, designed to provide hydraulic power to the engine cooling fan drive system, ensuring optimal engine operating temperature under heavy-duty working conditions.

This fan pump is compatible with multiple Komatsu bulldozer models including D61EX-15, D61PX-15, D65EX-15, D65PX-15, D65WX-15, and D85EX-15. Manufactured from high-strength cast iron and alloy steel to OEM specifications, this product ensures 100% drop-in interchangeability with the genuine Komatsu 708-1S-00240 fan pump without any system modifications. Every unit undergoes rigorous 100% simulated duty-cycle testing to validate pressure-flow performance characteristics.

Brand Disclaimer: This product is a high-quality compatible replacement engineered for full interchangeability with Komatsu original equipment. All Komatsu brand names and model codes are referenced solely to indicate compatibility and interchangeability. This product is manufactured by an independent producer and is not an original Komatsu product.

Technical Specifications 

• Part Number: 708-1S-00240

• Alternate Part Numbers: 708-1S-00241

• Brand Series: Komatsu D65EX-15 Series

• Product Type: Hydraulic Fan Pump

• Pump Type: Axial Piston Pump

• Function: Provides hydraulic power to the engine cooling fan

• Housing Material: High-strength cast iron and alloy steel

• Compatible Bulldozer Models:

  • D61EX-15, D61PX-15

  • D65EX-15 (including Landfill Spec., Overseas Version)

  • D65PX-15 (including Overseas Version)

  • D65WX-15

  • D85EX-15 (including Landfill Spec.)

  • D85MS-15, D85PX-15

• Weight: 26.3 – 29.0 kg

• Package Dimensions: 35 × 25 × 28 cm

• HS Code: 8413609090

• Country of Origin: Japan

• Equipment Type: Bulldozer

• Availability: In-Stock

Key Technical Advantages

1. Axial Piston Design – High-Efficiency Hydraulic Transmission

Built on an axial piston architecture, this pump delivers higher operating pressure and volumetric efficiency compared to gear pump alternatives. Ensures stable, sufficient hydraulic flow to the cooling fan across the full speed range, meeting the散热 demands of bulldozers under heavy-load, high-temperature conditions.

2. High-Strength Cast Iron & Alloy Steel Construction – Extreme Durability

The housing is constructed from high-strength cast iron with internal precision components machined from alloy steel. Provides excellent fatigue strength and long-term reliability under the vibration, shock, high-temperature, and high-contamination conditions typical of bulldozer operations.

3. OEM Specification – 100% Drop-In Interchangeability

Manufactured to strict Komatsu OEM specifications with identical part numbers, mounting dimensions, and port configurations to the genuine 708-1S-00240. Delivers 100% drop-in interchangeability with zero system modifications—significantly reducing maintenance downtime.

4. Optimized for Fan Drive Applications – Precise Temperature Control

Specifically engineered for engine cooling fan hydraulic drive systems. The pump’s output characteristics are precisely matched to fan drive system load demands, ensuring the engine operates within the optimal temperature window—extending engine life and reducing fuel consumption.

5. Broad Equipment Compatibility

Beyond the D65EX-15, this fan pump is compatible with multiple Komatsu bulldozer models including D61EX-15, D61PX-15, D65PX-15, D65WX-15, and D85EX-15. One pump for multiple models—simplifying spare parts inventory management.

6. 100% Simulated Duty-Cycle Testing

Every pump is 100% tested on dedicated hydraulic test benches under simulated real-world operating conditions—validating pressure-flow characteristics and efficiency curves at rated conditions—ensuring zero-defect, plug-and-play performance upon installation.

Application Areas

• Komatsu D65EX-15 Bulldozer: Engine cooling fan hydraulic drive system

• Komatsu D61EX/PX-15 Bulldozer: Cooling fan hydraulic drive

• Komatsu D85EX-15 Bulldozer: Cooling fan hydraulic drive

• Komatsu D65PX/WX-15 Bulldozer: Cooling fan hydraulic drive

• Heavy Construction Equipment Cooling Systems:同类 equipment requiring high-reliability hydraulic fan drives

Expert Maintenance Tips

1. Fluid Cleanliness Control

Axial piston pumps are highly sensitive to fluid contamination. Maintain system fluid cleanliness to ISO 4406 18/16/13 or better. Install a ≤10 μm absolute filtration filter in the return line to prevent particle contamination from damaging精密 piston and valve plate mating surfaces.

2. Inlet Line Requirements

Keep suction lines short and straight with adequate diameter—not less than the port size. Inlet pressure must be maintained between 0.8 – 2.0 bar (absolute) . Prevent cavitation from insufficient suction that could damage pistons and cylinder blocks.

3. Installation Torque Specifications

Always use a torque wrench during installation. Follow the torque sequence and values specified in the Komatsu service manual. Prevent pump housing deformation or seal failure from uneven tightening.

4. First-Start Priming Procedure

Before initial startup, thoroughly bleed air through the drain port or a loosened outlet fitting. Perform 2–3 jog starts under no-load conditions until oil fills the pump cavity without air bubbles, then connect the load circuit for full operation.

5. Fluid Temperature Monitoring

Recommended operating temperature range: +30°C to +80°C. During cold starts when oil temperature falls below +10°C, preheat the fluid or reduce startup speed to prevent cavitation damage from excessive viscosity.

6. Periodic Inspection & Replacement

Inspect fan pump output pressure and flow every 2,000 operating hours or at least annually. If performance degradation or abnormal noise is detected, schedule service or replacement promptly.