OMFB HDS 64 Series Axial Piston Pump | HDS-ISO 64 S L 601-001-10649

The HDS 64 (HDS-ISO 64) Series of high-pressure, bent-axis axial piston pumps and motors manufactured by Chengyuan Hydraulic are premium fluid power components engineered to fully match the strict European technical standards of OMFB. Utilizing a classic $40^\circ$ bent-axis architecture, this high-performance platform is purposely optimized for heavy truck tip-gear setups, truck-mounted cranes, aerial lifts, and diverse commercial vehicle PTO (Power Take-Off) grids. Covering the primary target part numbers provided—HDS-ISO 64 S(L) 601-001-10649 (Left-hand rotation) and HDS 64 D(R) ISO 601-001-10643 (Right-hand rotation)—Chengyuan guarantees 100% original-place interchangeable plug-and-play compatibility for both the standard ISO 4-bolt mounting flange and the DIN 5462 8-tooth involute splined shaft. Every unit is subjected to 100% simulated dynamic load testing and pressure peak mapping prior to delivery, securing exceptional volumetric consistency during severe, intermittent tipping cycles.

Technical Specifications :

• Brand Cross-Reference: OMFB HDS 64 Series Equivalent

• Target Model Nomenclature: 601-001-10649 (Left-Hand Rotation L / S), 601-001-10643 (Right-Hand Rotation R / D)

• Geometric Volumetric Displacement: 63.7 $cm^3/rev$

• Continuous Rated Pressure: 350 bar (35 MPa)

• Maximum Intermittent Peak Pressure: 400 bar (40 MPa)

• Max. Continuous Full-Load Speed: 1900 rpm

• Maximum Intermittent Speed Limit: 2500 rpm

• Minimum Stable Operating Speed: 300 rpm

• Mounting Flange Configuration: ISO 7653 Standard (4-hole direct-mount for truck PTO applications)

• Drive Shaft Specification Profile: Standard DIN 5462 (8-tooth spline, dimensions 8x32x36)

• Main Working Port Profiles: Rear-ported layout featuring standard G 3/4″ BSPP female threads

• Net Weight: ~13.5 kg (29.7 lbs)

Key Technical Advantages:

• High-Efficiency $40^\circ$ Tapered Piston Bent-Axis Geometry: The inner core features a high-angle orientation combining spherical-head pistons and a synchronous cylinder block matrix. This layout significantly diminishes cross-cutting radial force components on the piston shafts, raising mechanical efficiency beyond 93%. It provides far superior particle tolerance and low-vibration high-speed stability compared to swashplate alternatives.

• Hardened Ductile Iron Cylinder Block & Lapped Valve Plate: The cylinder barrel is cast from specialized high-density wear-resistant ductile iron, precision-honed to match a single-piece, heat-treated spherical valve plate. This micro-honed dynamic oil film boundary prevents high-to-low pressure internal cross-leakage, keeping total volumetric efficiency above 95% even during continuous 350 bar operations.

• Heavy-Duty Reinforced Tapered Roller Bearing Columns: To counteract severe alternating radial and axial load forces exerted by raw mechanical taking gears, the front drive shaft is held by dual high-precision reinforced tapered roller bearings. This enables the unit, when deployed as a motor, to accept direct belt pulley or drive-gear side-forces without suffering shaft deflection, multiplying bearing fatigue life.

• Monoblock High-Tensile Commercial Vehicle Grade Housing: The external casing is cast as a single block from premium nodular iron treated with thermal aging cycles. The compact form factor is mathematically tailored to fit the tight envelope configurations of modern truck chassis layouts. It reduces total unit weight to just 13.5 kg while providing exceptional bursting resistance against high-frequency fluid pulsations.

Application Areas:

• Heavy Commercial Logistics & Sanitation Vehicles: Multi-stage telescopic cylinder propulsion for heavy dumper tippers, and high-pressure power packs for garbage compactors.

• Lifting & Municipal Engineering Machines: Main high-pressure hydraulic supply pumps for heavy truck-mounted cranes and telescopic boom aerial work platforms.

• Industrial Marine & Recovery Winches: Functioning as an LSHT or high-speed motor to directly propel recovery winch drums on tow trucks and vehicle transport haulers.

Expert Maintenance Tips:

• Strictly Validate PTO Rotation Alignment to Avoid Catastrophic Rupture: Although the HDS 64 design allows bidirectional configurations, the specific models 601-001-10649 (Left-Hand) and 601-001-10643 (Right-Hand) must be pre-configured and verified against the actual rotation of the transmission PTO box before mounting! Forcing a left-hand pump into a right-hand PTO output will create an instantaneous internal pressure block that destroys the valve plate and blows out the shaft seal within 3 seconds of engagement.

• Mandatorily Complete Housing Air Purging and Oil Pre-Filling Prior to Initial Start: Bent-axis piston pumps naturally retain large internal clearances inside the casing. Before launching the system under load, remove the top-most drain plug, fill the pump housing completely with clean hydraulic fluid, and manually turn the shaft by hand 3-5 revolutions. Starting the pump completely dry will lock up the piston heads inside the barrel bores, causing irreversible scoring or shaft shear failure.

• Enforce Large-Bore Suction Plumbing Metrics (Minimum 1.5 Inches): Because the 64cc displacement draws a substantial fluid volume—especially during winter cold-starts when fluid viscosity spikes—any intake restriction will induce cavitation. Never use thin-walled or unreinforced suction hoses that can collapse under vacuum; always employ a steel-wire reinforced suction line (ID $\ge 38mm$) paired with a 125-micron suction strainer to ensure smooth, uninhibited fluid supply.