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1. What models does this hydraulic oil gear pump fit?
This hydraulic gear pump is specifically designed to fit Komatsu wheel loader models WA600-3 and WD600. It is a direct replacement for the original equipment (OE) parts with part numbers 705-53-31020, 705-53-42000, and 705-11-38040.
2. What are the core functions of this hydraulic gear pump?
The primary function is to deliver high-pressure hydraulic oil to power critical systems of the Komatsu wheel loader, including:
- Loader arm lifting and lowering
- Bucket tilting and dumping
- Steering system operation
- Other hydraulic-driven attachments
It ensures stable fluid transfer, consistent pressure output, and reliable performance under heavy-duty working conditions.
3. What materials are used in the pump’s construction?
- Gear Rotors: High-strength alloy steel (heat-treated for wear resistance and durability)
- Pump Housing: Die-cast aluminum alloy (lightweight, corrosion-resistant, and high-pressure resistant)
- Shaft: Chrome-plated carbon steel (enhanced toughness and anti-fatigue performance)
- Seals/Gaskets: Nitrile rubber (NBR) or Viton (for oil resistance and leak-proofing)
All materials comply with industrial standards to withstand extreme temperatures, heavy loads, and long-term operation.
4. What are the key technical specifications?
| Specification | Details |
|---|---|
| OE Part Numbers | 705-53-31020, 705-53-42000, 705-11-38040 |
| Pump Type | External Gear Pump (Hydraulic Oil) |
| Maximum Working Pressure | 25 MPa (3625 psi) |
| Maximum Flow Rate | 120 L/min (31.7 US gal/min) |
| Operating Temperature Range | -20°C to 100°C (-4°F to 212°F) |
| Rotation Direction | Clockwise (CW) / Counterclockwise (CCW) (per OE design) |
| Mounting Style | Direct Bolt-On (matches Komatsu OE dimensions) |
| Inlet/Outlet Port Size | 1.5″ (Inlet) / 1.25″ (Outlet) (threaded ports) |
