Place of Origin:
China
Brand Name:
Hitachi
Model Number:
K3V280SH
Excavator Hydraulic Pump Assembly K3V280SH for Hitachi EX650 EX700 EX750
Restore the full hydraulic power of your large Hitachi excavator with this high-performance K3V280SH main pump assembly. Designed for heavy-duty models including EX650, EX700, EX750, EX800, EX870, EX1100, and EX1200-3, this pump delivers the high pressure and flow required for demanding earthmoving, mining, and quarry applications. Built to OEM specifications, it ensures reliable, consistent performance and extended service life in the harshest operating conditions.
| Item | Specification |
|---|---|
| Model | K3V280SH (Tandem Variable Displacement Axial Piston Pump) |
| Configuration | Dual swash plate axial piston pump (double pump assembly) |
| Displacement per pump | 280 cm³/rev (cc/rev) |
| Total displacement | 560 cm³/rev (for double pump) |
| Rated pressure | 34.3 MPa (343 bar) |
| Maximum pressure | 39.2 MPa (392 bar) |
| Rated speed | 1800–2000 rpm (excavator application) |
| Maximum self-priming speed | 2,360 rpm |
| Flow rate (at 1800 rpm) | ~1008 L/min (total, theoretical) |
| Control type | Load sensing + negative flow control (excavator system) |
| Drive shaft spline | SAE standard or excavator-specific spline |
| Mounting flange | Excavator engine flywheel housing compatible |
| Approximate weight | ~300–350 kg |
| Compatible excavators | Hitachi EX650 EX700 EX750 EX800 EX870 EX1100 EX1200-3 , Sumitomo SH800, etc. |
| Part Number | Type | Description & Compatibility |
|---|---|---|
| K3V280SH | Base Model Number | Official Kawasaki pump model designation for the EX-series main pump |
| K3V280SH100R-0E02 | Kawasaki OEM | Full factory part number for the standard EX-series configuration |
| K3V280SH100R-0E02-VD | Kawasaki OEM | Version with electronic proportional control valve (EX1200-3 specific) |
| 4644567 | Hitachi OEM | Factory-original pump assembly for EX700/EX800 |
| 4644568 | Hitachi OEM | Updated service replacement version for EX750/EX870 |
| 4644569 | Hitachi OEM | EX1100/EX1200-3 specific pump assembly |
| 9170546 | Hitachi OEM | EX650 early production version pump assembly |
| K3V280SH | Aftermarket Format | Common listing format for aftermarket pumps (no suffix) |
| 4644567R | Remanufactured | Hitachi remanufactured pump assembly part number |
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