Kawasaki K5V160DTH1ZXR-9T46-BV Hydraulic Pump Detailed Explanation,Material Code: 60357527.
This is an original Kawasaki Heavy Industries (KPM) K5V series dual-variable axial piston pump. It serves as the main pump for 30-36 ton excavators such as Sany SY335/SY365 and XCMG XE370, and is also the mainstream hydraulic configuration for medium and large excavators.
Model Breakdown and Meaning
| Part | Meaning Explanation |
| K5V | Kawasaki engineering high-pressure axial piston pump series, better suited for electro-hydraulic negative flow systems than the traditional K3V series. |
| 160 | Single pump displacement: 160 cm³/r; total displacement of dual pumps in parallel: 320 cm³/r. |
| DTH1ZXR | D (Dual Pump Parallel) + TH1 (Negative Flow + Constant Power Control) + ZX (Adapted for Sany System) + R (Clockwise Rotation from Shaft End). |
| 9T46-BV | Custom adaptation code, matching the hydraulic system of Sany SY365 and other models. |
Core Technical Parameters
| Item | Parameter |
| Rated Pressure | 34.3 MPa (343 bar) |
| Peak Pressure | 39.2 MPa (392 bar) |
| Maximum Speed | 2,400 rpm (Recommended operating speed: 1,800-2,000 rpm) |
| Control Method | Negative Flow Control (NFC) + Constant Power Torque Limiting Control |
| Theoretical Flow (Dual Pump) | 320 cm³/r × 1800 rpm = 576 L/min |
| Weight | ~260 kg (Including regulator and solenoid valve assembly) |
| Place of Manufacture | Original Japanese manufacturing |
Product Features and Compatible Models
1. **Efficient and Stable Control Logic**: Combines negative flow and constant power dual control modes to automatically adjust flow distribution according to load, balancing operational efficiency and fuel consumption control, meeting the compound action requirements of medium and large excavators.
2. **Highly Reliable Structural Design**: Employs an inclined disk axial piston structure with core components (cylinder block, distributor plate, pistons) as original Kawasaki parts, offering excellent resistance to impact and wear, suitable for harsh conditions such as mining and heavy-duty operations.
3. **Wide Range of Compatible Models**: Primarily compatible with:
- Sany: SY335, SY365H, SY375
- XCMG: XE335, XE370
- Some domestic excavators of the same tonnage and certain imported models can be used as replacements.
Common Faults and Maintenance Tips
- **Weak operation/slow speed**: First check if the regulator solenoid valve is stuck, or if excessive internal leakage is caused by wear of the distributor plate or piston cylinder block.
- **Stalling when hot/pressure not rising**: Often due to hydraulic oil contamination, reduced viscosity, or failure of the constant power control logic. Check the pilot pressure and main pump regulator.
- **Maintenance Recommendations**:
- Regularly replace hydraulic oil and filters to prevent pump wear caused by oil contamination.
- Ensure coaxiality of the spline shaft and coupling during installation to avoid damage to the input shaft from misalignment.
- Bleed air from new pumps as required to prevent dry running damage to pistons and cylinder blocks.