HYDRO LEDUC HDS Series Piston Pump | HDS-64 ISO S(L) | 601-001-10649 | 108-015-06044

The HDS Series bent-axis axial piston pumps by Chengyuan Hydraulic are high-end hydraulic components specifically engineered for truck PTOs and heavy-duty mobile equipment. This series is fully compatible with HYDRO LEDUC technical standards, including the core model HDS-64 (601-001-10649). The HDS-64 features an iconic $40\text{°}$ bent-axis structure, a geometric characteristic that provides exceptional power density and superior self-priming performance at high speeds. The mono-block heavy-duty housing is designed to withstand $400\text{ bar}$ peak pressure without leakage risks. All products undergo 100% simulated condition testing to ensure volumetric efficiency and response precision match original factory benchmarks, enabling 100% original-place interchangeability.

Technical Specifications:

• Core Model: HDS-64 S (Clockwise) / HDS-64 L (Counter-Clockwise)

• Part Numbers (P/N): 601-001-10649 / 108-015-06044

• Displacement: $63.0\text{ cm}^3\text{/rev}$

• Max Continuous Pressure: $350\text{ bar}$

• Peak Pressure (Intermittent): $400\text{ bar}$

• Max Self-Priming Speed: $2700\text{ rpm}$

• Max Intermittent Speed: $3000\text{ rpm}$

• Shaft Standard: DIN 5462 / ISO 7653 (8-teeth spline $8\times32\times36$)

• Mounting Flange: 4-bolt ISO standard (Standard commercial vehicle PTO interface)

• Weight: Approx. $12.5\text{ kg}$

Key Technical Advantages:

• $40\text{°}$ Bent-Axis Geometry: Compared to conventional $30\text{°}$ designs, the HDS-64 rotary group achieves a larger stroke within a smaller radius. This compacts the axial dimensions and optimizes weight distribution, significantly reducing centrifugal forces and vibration at high RPMs.

• Dual Rotation Sealing Process: Tailored for harsh environments, the pump features specialized FKM (Viton) seals that maintain integrity from $-25\text{°C}$ to $+110\text{°C}$. This ensures effective resistance against environmental dust and extreme oil temperatures.

• 7-Piston Hydrostatic Balance: The 7-piston assembly is rigidly connected to the drive shaft via precision-lapped ball heads, eliminating traditional slipper designs. This removes the risk of slipper detachment under high pressure, drastically improving reliability under frequent shock loads.

• Mono-block Housing Technology: The single-piece cast housing design eliminates longitudinal joints. This prevents common leakage issues under high-pressure cycles and enhances the pump’s structural rigidity against deformation under extreme PTO torque.

Application Areas:

• Municipal Vehicles: Hydraulic drive systems for refuse collectors and road sweepers.

• Lifting Machinery: Truck-mounted cranes and hydraulic lifting cylinders for tippers.

• Forestry/Special Vehicles: Rotor motor drives for harvesters and multi-way valve supply for snowplows.

Expert Maintenance Tips:

• Direction Setting (S/L): HDS series pumps typically allow for CW/CCW conversion by flipping the rear cover plate. Always verify PTO rotation before installation; the wrong direction will cause rapid cavitation and damage.

• Inlet Hose Selection: It is recommended that the suction hose ID be at least $50\text{ mm}$ (2″). Use reinforced wire hoses to prevent collapse. Insufficient suction leads to high-frequency noise and shortened piston life.

• Initial Bleeding: After installation, the pump must be filled with hydraulic oil via the bleed screw. Once air is removed, run the system at idle for 5 minutes to stabilize pressure before applying full load.