4373709 4377971 hydraulic pump for Hitachi EX60-5 mini excavator
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OEM 4373709 / 4377971 | AP2D36 Main Pump Assembly
1. Product Description
This is a genuine OEM AP2D36 series variable displacement axial piston main pump, part numbers 4373709 and 4377971, designed for the Hitachi EX60-5 6-ton mini excavator. It serves as the core power source for the hydraulic system, delivering reliable pressure and flow for digging, lifting, and travel operations.
The pump features a compact, integrated design (main pump + pilot gear pump), high power density, and excellent wear resistance. It is a direct bolt-on replacement for the original unit, restoring the machine’s performance, efficiency, and reliability.
2. Key Specifications
Model: AP2D36LV1RS6 (AP2D36)
OEM Part Numbers: 4373709, 4377971
Pump Type: Variable displacement axial piston main pump (with integral pilot gear pump)
Displacement: 36 cm³/rev
Rated Pressure: 21 MPa (210 bar)
Max Pressure: 24.5 MPa (245 bar)
Rotation: Clockwise (shaft end view)
Control: Load sensing (LS) + pressure cut-off
Shaft: 13 teeth
Weight: ~32 kg
Quality: OEM equivalent / genuine, CE certified
3. Compatibility
Fits the following Hitachi mini excavator models:
Hitachi EX60-5
Hitachi EX60BUN-5
Hitachi EX70-5 / EX70LCK-5
Hitachi ZX70 / ZX70-5
4. Technical Features
Integrated Design: Combines main piston pump and pilot gear pump in one housing, saving space and simplifying installation.
Load Sensing Control: Automatically adjusts flow and pressure according to load, reducing fuel consumption and heat generation.
Hardened Components: Cylinder block, pistons, and valve plate made of high-strength alloy for long service life.
Easy Installation: Direct replacement, no modification required; matches original mounting holes and port connections.
5. Why Choose Us
Specialized Supplier: Over 10 years focused on excavator hydraulic parts.
Genuine & Aftermarket: Supply both original OEM and high-quality aftermarket pumps.
In Stock: Large inventory in Guangzhou warehouse for fast shipment.
Warranty: 1-year warranty against manufacturing defects.
Fast Delivery: Express (3–7 days) or sea freight (30–45 days) available.
6. FAQ
Q: Is this pump compatible with both EX60-5 and EX70-5?A: Yes, it is a direct fit for both models (OEM 4373709 / 4377971).
Q: Do you have this pump in stock?A: Yes, regular stock available; can ship within 1–2 business days.
Q: What is the difference between this AP2D36 and the earlier A10VD43 for EX60-2/3?A: The AP2D36 is a later, more compact design with integrated pilot pump, while the A10VD43 is an older model with separate pilot pump. They are not interchangeable.