HYDRO LEDUC HDS Series Bent Axis Pump | HDS-34 HDS-64 HDS-84 | 601-001-10343

The HDS Series bent axis axial piston pumps by Chengyuan Hydraulic are high-performance units fully compatible with HYDRO LEDUC engineering standards. This range includes key models such as HDS-34 (601-001-10343), HDS-64 (601-001-10643), and HDS-84. Utilizing an advanced $40\text{°}$ bent-axis geometry, these pumps achieve exceptional power density and compact installation dimensions. The mono-block housing design provides superior structural rigidity, allowing for stable operation at $400\text{ bar}$ peak pressures. Every HDS pump undergoes 100% simulated condition testing to ensure response speed, suction capability, and volumetric efficiency meet original factory benchmarks, making them the premier choice for commercial vehicle PTO systems.

Technical Specifications :

• Model Range: HDS-34, HDS-47, HDS-64, HDS-84, HDS-108

• Displacements: $34\text{, } 64\text{, } 84\text{ cm}^3\text{/rev}$

• Operating Pressure: Rated $350\text{ bar}$ / Peak $400\text{ bar (5800 psi)}$

• Max Speed (Continuous): $2300\text{–}2700\text{ rpm}$

• Max Speed (Intermittent): Up to $3000\text{ rpm}$

• Shaft Standard: DIN 5462 / ISO 7653 (Standard 8-teeth spline)

• Rotation: Reversible or Clockwise/Counter-clockwise determined by rear cover position

• Seal Material: High-spec FKM (Viton) for high thermal and chemical resistance

Key Technical Advantages:

• Mono-block Housing Construction: The single-piece cast housing minimizes potential leak paths and enhances resistance to high-pressure fatigue. This ensures precise internal alignment of mechanical components even under extreme torque loads.

• $40\text{°}$ Bent-Axis Geometry: Compared to conventional $20\text{°}$ or $30\text{°}$ designs, the HDS series offers higher torque output within a smaller footprint and optimizes oil suction, significantly reducing cavitation risk at high speeds.

• 7-Piston Rotary Group: Featuring seven precision-lapped pistons rigidly connected to the drive shaft via ball-heads. This eliminates the risk of slipper detachment common in other designs, drastically improving reliability in high-cycle commercial vehicle applications.

• Enhanced Inlet Porting: The inlet geometry is optimized for cold environments and high-viscosity fluids, maintaining excellent self-priming capabilities during low-temperature startups and extending the service life of rotary parts.

Application Areas:

• Commercial Vehicles: Hydraulic main pumps for dump trucks, refuse collectors, and truck-mounted cranes.

• Construction Machinery: Auxiliary drive circuits for compact loaders and mini-excavators.

• Forestry Equipment: Rotor motors for harvesters and hydraulic systems for log loaders.

Expert Maintenance Tips:

• Rotation Direction: Before mounting to the PTO, verify the required rotation (CW or CCW). The HDS series usually allows for rotation changes by flipping the inlet/outlet port plate.

• Inlet Hose Sizing: Ensure the suction hose diameter is at least equal to the pump inlet size. Keep the line short and straight to prevent aeration and noise at high RPMs.

• Case Priming: Before the initial startup, the pump housing must be filled with hydraulic oil via the bleed screw to prevent dry-start damage to the pistons and valve plate.