Piston Motors
HENGYUHANG HYH6VE Series 65 Variable Plug-in Motor
Engineered with high-pressure bent-axis technology and an integrated intermediate recessed mounting flange, the HENGYUHANG HYH6VE Series 65 variable plug-in motor delivers up to 530 bar peak capability, high-speed swiveling down to zero displacement, and direct drop-in integration into mechanical planetary travel and winch reduction gearboxes.
| Applications
Specially designed for space-critical mobile hydrostatic drives, the HYH6VE series directly plugs into planetary travel drive hubs, crawler track drives, drilling head reduction boxes, mobile crane hoists, and forestry winch transmissions. Its compact recessed envelope eliminates external coupling brackets, optimizing machine center of gravity and installation space.
| Key Technical Specifications
Product Model: HYH6VE Series 65 (HYH6VE28, HYH6VE55, HYH6VE80, HYH6VE107, HYH6VE160, HYH6VE200)
Brand Replacement: Bosch Rexroth A6VE Series 65 (OEM or tailored as requested)
Displacement: 0 to 28.1 / 54.8 / 80.0 / 107.0 / 160.0 / 200.0 cm³/rev (Continuously variable, swivelable to Vg = 0)
Rotation Direction: Bi-directional / Reversible (Viewed on drive shaft: W)
Speed Range: Up to 5,550 rpm at Vg max; up to 8,750 rpm at Vg < Vgx; up to 10,450 rpm at Vg = 0
Peak Pressure: Nominal p nom = 400 bar (5,800 psi); Maximum peak p max = 450 bar (Size 28) / 530 bar (Sizes 55 to 200)
- Description
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| Overview of HENGYUHANG HYH6VE Series 65 Hydraulic Motors
The HENGYUHANG HYH6VE Series 65 is a heavy-duty axial piston variable displacement plug-in motor utilizing a high-efficiency bent-axis rotary group designed for open and closed circuit hydrostatic transmissions. Featuring a specialized recessed intermediate mounting flange located centrally along the motor casing, the motor body partially sinks directly into the mechanical reduction gearbox. This architecture yields exceptional axial compactness, direct output shaft mesh into sun gears, and maximum resistance against external vibration and structural deflection. With wide-ratio displacement control ranging from maximum displacement down to zero (Vg = 0), the HYH6VE motor allows hydraulic systems to achieve ultra-high final drive road speeds, high low-end breakaway torque, and smooth stepless velocity transitions without mechanical multi-speed shifting.
| Dimension of HENGYUHANG HYH6VE Series 65 Hydraulic Motors
| Mechanical Plug-In Interface Specifications
| Frame Size (HYH6VE) | Mounting Flange (ISO 3019-2) | Pilot Centering Spigot (∅A9) |
|---|---|---|
| HYH6VE28 | ISO 135-2 | ∅135 −0.025/0 mm |
| HYH6VE55 | ISO 160-2 | ∅160 −0.025/0 mm |
| HYH6VE80 | ISO 190-2 | ∅190 −0.025/0 mm |
| HYH6VE107 | ISO 200-2 | ∅200 −0.025/0 mm |
| HYH6VE160 | ISO 200-2 | ∅200 −0.025/0 mm |
| HYH6VE200 | ISO 260-4 | ∅260 −0.081/0 mm |
| Frame Size (HYH6VE) | Pilot Length to Flange Face (A5) | Total Motor Length (A1 + A5) | Casing O-Ring Seal | Fastening Pitch Circle (∅A23) / Bolt Holes |
|---|---|---|---|---|
| HYH6VE28 | 88 mm | 238 mm | 126×4 mm | ∅160 mm / 2× ∅13.5 mm (Bolt M12) |
| HYH6VE55 | 91 mm | 258 mm | 150×4 mm | ∅200 mm / 2× ∅17.0 mm (Bolt M16) |
| HYH6VE80 | 109.5 mm | 285.5 mm | 182×4 mm | ∅224 mm / 2× ∅21.0 mm (Bolt M20) |
| HYH6VE107 | 121.8 mm | 308.8 mm | 192×4 mm | ∅250 mm / 2× ∅21.0 mm (Bolt M20) |
| HYH6VE160 | 122 mm | 365 mm | 192×4 mm | ∅250 mm / 2× ∅21.0 mm (Bolt M20) |
| HYH6VE200 | 175 mm | 425 mm | Groove for O-ring | ∅300 mm / 4× ∅22.0 mm (Bolt M20) |
| Installation Specifications
| Mathematical Operating Characteristics
Inlet Flow Rate: qv = (Vg × n) / (1000 × ηv) [L/min]
Rotational Speed: n = (qv × 1000 × ηv) / Vg [rpm]
Output Torque: M = (Vg × Δp × ηhm) / (20 × π) [Nm]
Drive Power: P = (2π × M × n) / 60000 = (qv × Δp × ηt) / 600 [kW]
| Connection Port Identification & Standard Layout
| Port Identifier | Function / Port Description | Pressure Rating (pmax) | HYH6VE28 | HYH6VE55 | HYH6VE80 | HYH6VE107 | HYH6VE160 | HYH6VE200 |
|---|---|---|---|---|---|---|---|---|
| A, B | High-Pressure Working Ports | 450 bar / 530 bar | SAE 3/4" (M10×1.5) | SAE 3/4" (M10×1.5) | SAE 1" (M12×1.75) | SAE 1" (M12×1.75) | SAE 1 1/4" (M14×2) | SAE 1 1/4" (M14×2) |
| T1, T2 | Case Drain Fluid Ports | 3 bar continuous (10 bar peak) | M18×1.5 (12 deep) | M22×1.5 (15.5 deep) | M22×1.5 (15.5 deep) | M22×1.5 (15.5 deep) | M27×2 (19 deep) | M33×2 (19 deep) |
| X | Pilot Control Pressure Port | 100 bar (HP/HZ) / 3 bar (HA) | M14×1.5 (12 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) |
| G | Synchronous Control Port | 450 bar / 530 bar | M14×1.5 (12 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) |
| M1 | Measuring Port Control Pressure | 450 bar / 530 bar | M14×1.5 (12 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) | M14×1.5 (11.5 deep) |
| MA, MB | Working Pressure Measuring Ports | 450 bar / 530 bar | — | — | M18×1.5 (14.5 deep) | M18×1.5 (14.5 deep) | M22×1.5 (15.5 deep) | M22×1.5 (15.5 deep) |
| D | Speed Sensor Port | — | Prepared for DSA/DST speed sensors across all frame sizes | |||||
| Replacement Splined Shaft Interface Matrix (DIN 5480 Standard)
| Shaft Code | Spline Specification (DIN 5480) | Available Frame Sizes | Centering Bore / Retention Thread | Shaft Collar Distance (A14) |
|---|---|---|---|---|
| Z5 | W25×1.25×18×9g | HYH6VE28 | M8 × 1.25 (19 mm deep) | 89 mm |
| Z6 | W30×2×14×9g | HYH6VE28, HYH6VE55 | M10 × 1.5 / M12 × 1.75 | 89 mm / 92 mm |
| Z8 | W35×2×16×9g | HYH6VE55, HYH6VE80 | M12 × 1.75 (28 mm deep) | 92 mm / 110.5 mm |
| Z9 | W40×2×18×9g | HYH6VE80, HYH6VE107 | M12 × 1.75 / M16 × 2 | 110.5 mm / 122.8 mm |
| A1 | W45×2×21×9g | HYH6VE107, HYH6VE160 | M16 × 2.0 (36 mm deep) | 122.8 mm / 123 mm |
| A2 | W50×2×24×9g | HYH6VE160, HYH6VE200 | M16 × 2.0 (36 mm deep) | 123 mm / 132.5 mm |
Technical Specifications of HENGYUHANG HYH6VE Series 65 (Sizes 28–200)
4.1 Displacement, Speed, Flow, and Torque Ratings
| Technical Parameter | Unit | HYH6VE28 | HYH6VE55 | HYH6VE80 | HYH6VE107 | HYH6VE160 | HYH6VE200 |
|---|---|---|---|---|---|---|---|
| Maximum Displacement (Vgₘₐₓ) | cm³/rev | 28.1 | 54.8 | 80.0 | 107.0 | 160.0 | 200.0 |
| Minimum Displacement (Vg min) | cm³/rev | 0 (Adjustable) | 0 (Adjustable) | 0 (Adjustable) | 0 (Adjustable) | 0 (Adjustable) | 0 (Adjustable) |
| Intermediate Displacement (Vgx) | cm³/rev | 18.0 | 35.0 | 51.0 | 68.0 | 61.0 | 76.0 |
| Nominal Speed at Vgₘₐₓ (nₙₒₘ) | rpm | 5,550 | 4,450 | 3,900 | 3,550 | 3,100 | 2,900 |
| Maximum Permissible Speed (Vg<Vgx) (nₘₐₓ) | rpm | 8,750 | 7,000 | 6,150 | 5,600 | 4,900 | 4,600 |
| Maximum Limit Speed at Vg=0 (nmax0) | rpm | 10,450 | 8,350 | 7,350 | 6,300 | 5,500 | 5,100 |
| Max Inlet Flow Rate (qv max at nₙₒₘ) | L/min | 156 | 244 | 312 | 380 | 496 | 580 |
| Output Torque (Δp=400 bar at Vgₘₐₓ) | Nm | 179 | 349 | 509 | 681 | 1,019 | 1,273 |
| Rotary Stiffness (Vgₘₐₓ to Vg/2) | kNm/rad | 6.0 | 10.0 | 16.0 | 21.0 | 35.0 | 44.0 |
| Mass Moment of Inertia (J_TW) | kg·m² | 0.0014 | 0.0042 | 0.0080 | 0.0127 | 0.0253 | 0.0353 |
| Case Internal Oil Volume (VV) | L | 0.50 | 0.75 | 1.20 | 1.50 | 2.40 | 3.00 |
| Dry Weight (Port Plate 1, 2, 4) | kg | 19.0 | 28.0 | 36.0 | 46.0 | 62.0 | 78.0 |
| Dry Weight with BVI Valve (Port Plate 6) | kg | — | 37.0 | 45.0 | 52.0 | 70.0 | — |
4.2 Operating Pressure Boundaries
| Pressure Parameter | Rated Value | Operating Condition / Allowable Limits |
|---|---|---|
| Nominal Pressure (pₙₒₘ) | 400 bar (5,800 psi) | Continuous high-pressure rating across all frame sizes |
| Maximum Pressure (pₘₐₓ) Size 28 | 450 bar (6,500 psi) | Single operating cycle ≤10 s; total operating accumulation ≤300 hours |
| Maximum Pressure (pₘₐₓ) Sizes 55–200 | 530 bar (7,685 psi) | Single operating cycle ≤10 s; total operating accumulation ≤50 hours (450 bar up to 300 hours) |
| Summation Pressure (p_su) | 700 bar (10,150 psi) | Sum of simultaneous pressures at Port A and Port B (p_A + p_B) |
| Minimum High-Pressure Inflow | 25 bar (360 psi) | Required minimum pressure on loaded work port to prevent internal shoe liftoff |
| Continuous Housing Pressure (p_case) | 2.0 bar (29 psi) | Maximum average differential pressure at shaft seal to ensure extended seal life |
| Peak Housing Shock Pressure | 10.0 bar (145 psi) | Permissible transient pressure spike duration t<0.1 s |
4.3 Hydraulic Fluid Compatibility & Cleanliness
| Fluid Property | Operational Range | Criteria & System Guidelines |
|---|---|---|
| Recommended Mineral Fluid | HLP Mineral Oils per DIN 51524 | Suitable for environmentally acceptable (HEES/HEPR) fluids upon factory seal consultation |
| Optimum Viscosity Range (νₒₚₜ) | 16 to 36 mm²/s | Yields optimal volumetric efficiency and thermodynamic fluid life |
| Permissible Continuous Range | 10 to 400 mm²/s | Minimum short-term viscosity: ν_min=7 mm²/s (t≤3 min at p≤0.3×pₙₒₘ) |
| Cold Start Viscosity Limit | ≤1,600 mm²/s | t≤3 min at unloaded crawl speed (p≤50 bar, n≤1,000 rpm, ϑ≥−25 ∘C) |
| Fluid Temperature Range | −25 ∘C to +103 ∘C (FKM Seals) | Maximum continuous circuit temperature: +115 ∘C measured at work ports |
| Required ISO Cleanliness Class | ISO 4406 Class 20/18/15 | At fluid viscosity <10 mm²/s, minimum cleanliness must reach ISO 19/17/14 |
Advantages
Ultra-Compact Plug-In Architecture
Integrated intermediate ISO 3019-2 mounting flange allows the motor to sink deeply into the mechanical gearbox, drastically cutting drive-train overhang length, eliminating external alignment brackets, and minimizing chassis mass.
Superior Bent-Axis High-Speed Efficiency
Advanced bent-axis rotary group with spherical valve plate surfaces achieves overall efficiencies exceeding 93%, withstanding sustained continuous rotational speeds up to 5,550 rpm and zero-swivel overspeeds up to 10,450 rpm.
Wide 0-to-Max Swiveling Dynamic Range
Stepless displacement variability swivels completely down to zero (Vg=0), allowing seamless transition between high-torque tractive crawler pull and ultra-high machine roading speeds without shift hesitation.
Extreme 530 Bar Pressure Resilience
Solid high-integrity ductile iron motor casing and precision-forged steel pistons endure maximum shock pressures up to 530 bar, ensuring fail-safe operation during heavy stone encounters and sudden tractive stalling.
Integrated Valve & Braking Options
Fully compatible with bolt-on counterbalance valves (BVD/BVE), integrated compact counterbalance valves (BVI), brake release valves (external/internal ducting), and high-flow flushing valves (up to 37 L/min).
Direct 1:1 OEM Bolt-In Interchangeability
Identical pilot diameter tolerances, O-ring groove dimensions, DIN 5480 splines, and port centerlines allow immediate replacement of Bosch Rexroth A6VE Series 65 motors with zero mechanical modifications.
| Cross Reference
6.1 Dimensional & Hydraulic Frame Mapping
| Rexroth Original Model | Max Displacement | Min Displacement Capability | Mounting Pilot Spigot | DIN 5480 Splined Shaft | HENGYUHANG Replacement Model |
| A6VE28.../65 | 28.1 cm³/rev | 0 to 28.1 cm³/rev | ISO 135-2 (∅135 mm) | W25×1.25 (Z5) / W30×2 (Z6) | HYH6VE28 |
| A6VE55.../65 | 54.8 cm³/rev | 0 to 54.8 cm³/rev | ISO 160-2 (∅160 mm) | W30×2 (Z6) / W35×2 (Z8) | HYH6VE55 |
| A6VE80.../65 | 80.0 cm³/rev | 0 to 80.0 cm³/rev | ISO 190-2 (∅190 mm) | W35×2 (Z8) / W40×2 (Z9) | HYH6VE80 |
| A6VE107.../65 | 107.0 cm³/rev | 0 to 107.0 cm³/rev | ISO 200-2 (∅200 mm) | W40×2 (Z9) / W45×2 (A1) | HYH6VE107 |
| A6VE160.../65 | 160.0 cm³/rev | 0 to 160.0 cm³/rev | ISO 200-2 (∅200 mm) | W45×2 (A1) / W50×2 (A2) | HYH6VE160 |
| A6VE200.../65 | 200.0 cm³/rev | 0 to 200.0 cm³/rev | ISO 260-4 (∅260 mm) | W50×2×24×9g (A2) | HYH6VE200 |
6.2 Control Mechanism Functional Cross-Reference
| Control Code | Control Category | Actuation Characteristic | Operational Drive Function |
| HP1 / HP2 | Hydraulic Proportional | Positive control (ΔpSt = 10 bar or 25 bar) | Stepless displacement increase proportional to pilot pressure |
| HP5 / HP6 | Hydraulic Proportional | Negative control (ΔpSt = 10 bar or 25 bar) | Motor rests at Vg max; pilot pressure swivels motor to Vg min |
| EP1 / EP2 | Electric Proportional | Positive control (U = 12 V or 24 V DC) | Microprocessor/joystick controlled stepless speed/torque regulation |
| EP5 / EP6 | Electric Proportional | Negative control (U = 12 V or 24 V DC) | High-speed electric swiveling with failsafe return to Vg max |
| HZ5 / HZ7 | Hydraulic Two-Point | Negative pilot control (p pilot ≥ 10 bar) | Classic two-speed crawler travel drive (Turtle/Rabbit mode) |
| EZ5 / EZ6 | Electric Two-Point | Negative solenoid control (12 V / 24 V DC) | Instant push-button high/low speed switching via DEUTSCH connector |
| HA1 / HA2 | High-Pressure Automatic | Positive pressure-related automatic control | Self-regulating load-adaptive motor (swivels to Vg max under load) |
| DA0 | Speed-Related Automatic | Negative control coupled with hydraulic travel valve | Automotive-style travel drive regulated by engine tachometric pressure |
| Brand Replacement
Bosch Rexroth (Direct 1:1 drop-in replacement for A6VE Series 65 plug-in motors)
Linde Hydraulics (HMV-02 and HMV-D Series plug-in motors for mechanical reduction drives)
Danfoss / Sauer-Danfoss (Series 51-1 and H1B plug-in variable displacement motors)
Poclain and Parker Hannifin plug-in motor conversions engineered upon request
| Applications
Excavator & Crawler Crane Track Drives: Directly plugged into compact planetary track reduction drives, providing smooth high-speed travel and immense low-speed tractive pull.
Road Rollers & Soil Compactors: Vibration drum and propel transmission drives operating under demanding high continuous pressure conditions.
Horizontal Directional Drilling (HDD) Rigs: Carriage feeding drive heads and power swivel gearboxes requiring wide speed variation and robust zero-swivel freewheeling.
Forestry Harvesters & Forwarders: Bogie axle hub drives and high-torque wheel motors navigating rough terrain and steep gradients.
Mobile Winch & Crane Hoist Drives: Deeply nested inside winch drums to save critical deck and boom installation width.
Mining & Tunneling Roadheaders: Cutting drum auxiliary drives and crawler tramming transmissions operating in severe shock-load environments.
| Packaging & Shipping
| Packaging Layer | Material Standard & Specification | Protection Level |
| Primary Shielding | Corrosion-inhibiting VCI foil wrap, moisture desiccants, and heavy-duty port thread plugs | Total isolation against ocean atmospheric moisture, rust, and contamination |
| Shock Absorption | Form-fitted high-density expanded polyethylene (EPE) foam cushioning enclosure | Absorbs high multi-axis drops and prevents impact forces on pilot spigots and splines |
| Outer Enclosure | Heavy-duty ISPM-15 export-compliant non-fumigation engineered wooden crate | Rigid structural containment for global air cargo, ocean LCL/FCL, and multimodal transport |
| Logistics Options | Express Courier (DHL, FedEx, UPS), International Air Freight, Ocean Cargo (DDP / CIF) | Standard configurations dispatched in 48–72 hours; end-to-end milestone tracking |
| Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence:
Multi-Axis CNC Machining Infrastructure:
In-house precision machining centers, advanced spherical cup grinding lines, and automated honing cells process every motor housing, cylinder block, and valve plate under climate-controlled conditions.
Sub-Micron Micro-Finishing (Ra < 0.2 μm):
Critical dynamic friction pairs—including piston slipper pads, spherical cylinder block faces, and bi-metal valve plate running tracks—undergo super-finishing to ensure fluid-film hydro-dynamic equilibrium, minimal internal leakage, and zero micro-scuffing even under high operating temperatures.
Metallurgical Integrity & Thermal Hardening:
High-grade nodular ductile iron castings and hardened alloy piston assemblies withstand continuous 400 bar rated duty and 530 bar transient dynamic shock spikes without structural distortion or bore deformation.
100% Full-Cycle Multi-Parameter Factory Inspection & Digital Testing:
End-of-Line Automated Test Bench Validation:
Every assembled HYH6VE motor undergoes mandatory, computer-controlled testing simulating real-world excavator travel and winch drive duty cycles.
High-Standard Performance Criteria:
Volumetric Efficiency Verification: Proven > 94% at full displacement under full working pressure, eliminating sluggish machine drive response.
Pressure Endurance Verification: 100% sustained high-pressure hold at 400 bar nominal and 530 bar peak with zero external seal weepage.
Case Drain Flow Measurement: Real-time monitoring ensures internal bypass flow remains strictly within engineering limits, protecting machine coolers from excess heat generation.
Dynamic Two-Speed Response: Millisecond-level tracking of swashplate shift response from Vg max down to Vg min under HP, HZ, EZ, and HA control modes, verifying smooth, hysteresis-free transition without machine jerk.
Full Traceability: Individual test data curves and quality inspection logs are archived per unit serial number before packaging.
Seamless 1:1 OEM Drop-In Interchangeability (True Plug-and-Play):
Exact Dimensional Match:
Intermediate recessed flange pilot diameters (ISO 135-2, 160-2, 190-2, 200-2, 260-4), bolt circle PCDs, and pilot depth dimensions correspond 1:1 to original Bosch Rexroth A6VE Series 65 specifications down to the millimeter.
Zero Piping or Chassis Rework:
Standard rear SAE ports (Port Plate 1), side opposite SAE ports (Port Plate 2), and counterbalance-ready ports (Port Plate 6/7/8) connect directly to existing high-pressure hose assemblies and planetary gearboxes with zero pipe bending or adaptor refitting.
Drive Spline Conformity:
Precision DIN 5480 involute splines (Shaft Codes Z5, Z6, Z8, Z9, A1, A2) mesh seamlessly with OEM planetary sun gears and travel reduction gear hubs without spline binding, backlash vibration, or premature drive hub wear.
Flexible Engineering Customization & Rapid Prototyping:
Tailored Displacement Settings:
Factory-preset minimum displacement screws (Vg min) calibrated exactly to client gearbox speed requirements prior to shipment, saving field commissioning labor.
Custom Orifice & Shift Tuning:
Tailored internal shift damping orifices engineered to dampen shift shock in sensitive hydrostatic transmissions.
Agile OEM/ODM Solutions:
Experienced fluid power engineers provide rapid turnaround for customized port thread standards (Metric / SAE / BSPP), specialized shaft extensions, and integrated dual counterbalance/flushing valve blocks, backed by flexible, low-MOQ policies for trial batches.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch:
Strategic Component Buffering:
Continuous safety stocks of fully machined plug-in motor housings, finished bent-axis rotary groups, precision bearing kits, and modular EZ/HZ/HA pilot controllers maintained at the factory warehouse.
Rapid 48–72 Hour Dispatch:
Standard configurations and replacement units ship within 48 to 72 hours of order confirmation, eliminating costly mobile machinery downtime.
Global Multimodal Logistics:
Established partnerships with tier-1 international freight forwarders, supporting express courier (DHL, FedEx, UPS), air cargo, and door-to-door DDP ocean shipping with full customs handling.
12-Month Comprehensive Warranty & Dedicated Lifetime Technical Support:
Full-Protection Factory Warranty:
Comprehensive 12-month warranty covering any manufacturing or material defects with immediate replacement-part dispatch support.
24-Hour Drawing & Model Code Verification:
Dedicated technical desk reviews customer machine models, nameplates, port layouts, and dimensional drawings within 24 hours to guarantee zero ordering errors.
Direct Hydraulic Engineering Consultation:
Direct technical access to fluid power engineers for circuit troubleshooting, oil contamination analysis, flushing flow sizing, and replacement cross-referencing throughout the machine's entire operational lifecycle.
HENGYUHANG Variable Plug-In Motor HYH6VE Series 65
HENGYUHANG Variable Plug-In Motor HYH6VE Series 65 is a high-pressure, bent-axis axial piston variable displacement hydraulic motor engineered specifically for direct, space-saving integration into mechanical planetary gearboxes and travel drives. Operating across both open and closed hydrostatic circuits, the HYH6VE Series 65 features a recessed ISO 3019-2 mounting flange that allows the motor housing to nest directly inside the planetary gearbox ring gear or travel reducer cavity. Built with precision tapered piston rotary groups, the HYH6VE Series 65 provides an ultra-wide control range with zero-displacement capability (swivel to Vg = 0 cm³), approved overspeed ratings exceeding 10,000 rpm, extreme continuous operating pressure ratings of 400 bar (peak up to 530 bar), and massive starting torque. The HYH6VE Series 65 is an exact dimensional and functional drop-in replacement for original Bosch Rexroth A6VE Series 65 plug-in motors used in crawler excavator travel drives, crane winch drums, drill rig rotary heads, and heavy industrial machinery.
Key Technical & Operational Features
Compact Plug-In Architecture: Recessed mounting flange located at the center of the housing eliminates intermediate drive shafts and external couplings, allowing the motor to plug directly into the gear transmission for unmatched space savings.
Bent-Axis Tapered Piston Design: Robust bent-axis geometry with spherical piston heads and one-piece cylinder block ensures exceptional mechanical-hydraulic efficiency, high starting torque, and minimal internal friction.
Extreme High-Pressure Performance: Rated for 400 bar continuous nominal pressure across all frame sizes (28 to 200), with maximum permissible peak pressure ratings of 450 bar (size 28) and up to 530 bar (sizes 55 to 200).
High Control Range with Zero-Swivel Capability: Infinitely variable displacement can be swiveled from maximum displacement (Vg max) all the way down to zero (Vg = 0 cm³), enabling maximum vehicle roading speeds and planetary gearbox freewheeling.
Approved for Very High Rotational Speeds: Capable of operating up to 5550 rpm at full displacement and up to 10450 rpm at zero displacement (size 28), accommodating extreme hydrostatic transmission speed ratios.
Optional Integrated Counterbalance Valve (BVI): Specially engineered for crawler excavator track drives to prevent motor runaway, overspeeding, and circuit cavitation when decelerating or driving downhill on steep gradients.
Optional Mounted Flushing & Boost-Pressure Valves: Available with factory-configured flushing valves (3.5 to 37 L/min) to continuously purge hot oil from closed circuits into the reservoir for efficient cooling.
Comprehensive Control Options: Supports hydraulic proportional control (HP), electric proportional control (EP), hydraulic two-point control (HZ), electric two-point control (EZ), high-pressure automatic control (HA), and speed-dependent control (DA).
Heavy-Duty Industrial & Mobile Applications
HENGYUHANG HYH6VE Series 65 plug-in motors are engineered for demanding hydrostatic drives where high pressure, high torque, high speed, and minimal axial installation depth are mandatory:
Crawler Excavators & Track Drives: Direct integration into planetary track final drives (travel reducers) on 6-ton to 50-ton hydraulic excavators, trenchers, and tracked loaders.
Drilling & Foundation Machinery: Rotary drilling rig track drives, continuous flight auger (CFA) heads, horizontal directional drilling (HDD) carriage feeds, and tunnel boring auxiliary drives.
Mobile Cranes & Hoisting Winches: Planetary winch drums for all-terrain cranes, crawler cranes, offshore anchor winches, and tugger winches where the motor plugs directly inside the drum tube.
Forestry & Road Construction Equipment: Asphalt road milling machine drum drives, road paver traction drives, forestry tree harvesters, forwarder bogie wheels, and heavy soil compactors.
Technical Performance Matrix (OEM Benchmark Standard)
| Technical Parameter / Unit | Size 28 | Size 55 | Size 80 | Size 107 | Size 160 | Size 200 |
|---|---|---|---|---|---|---|
| Maximum Geometric Displacement Vg max [cm³] | 28.1 | 54.8 | 80.0 | 107.0 | 160.0 | 200.0 |
| Minimum Geometric Displacement Vg min [cm³] | 0 | 0 | 0 | 0 | 0 | 0 |
| Intermediate Swivel Displacement Vgx [cm³] | 18.0 | 35.0 | 51.0 | 68.0 | 61.0 | 76.0 |
| Nominal Continuous Working Pressure pnom [bar / psi] | 400 / 5800 | 400 / 5800 | 400 / 5800 | 400 / 5800 | 400 / 5800 | 400 / 5800 |
| Maximum Peak Working Pressure pmax [bar / psi] | 450 / 6500 | 530 / 7700 | 530 / 7700 | 530 / 7700 | 530 / 7700 | 530 / 7700 |
| Nominal Speed at Vg max (nnom) [rpm] | 5550 | 4450 | 3900 | 3550 | 3100 | 2900 |
| Maximum Speed at Vg < Vgx (nmax) [rpm] | 8750 | 7000 | 6150 | 5600 | 4900 | 4600 |
| Maximum Speed at Zero Swivel Vg = 0 (nmax) [rpm] | 10450 | 8350 | 7350 | 6300 | 5500 | 5100 |
| Maximum Inlet Flow qv max (at nnom, Vg max) [L/min] | 156 | 244 | 312 | 380 | 496 | 580 |
| Theoretical Torque at Vg max (Δp = 400 bar) [Nm] | 179 | 349 | 509 | 681 | 1019 | 1273 |
| Rotary Stiffness Vg max to Vg/2 cmin [kNm/rad] | 6 | 10 | 16 | 21 | 35 | 44 |
| Rotary Stiffness Vg/2 to Vg = 0 cmin [kNm/rad] | 18 | 32 | 48 | 65 | 105 | 130 |
| Moment of Inertia of Rotary Group JTW [kg·m²] | 0.0014 | 0.0042 | 0.0080 | 0.0127 | 0.0253 | 0.0353 |
| Case Fluid Volume [L] | 0.50 | 0.75 | 1.20 | 1.50 | 2.40 | 3.00 |
| Dry Weight (Standard Port Plate 1, 2, 4) [kg] | 19 | 28 | 36 | 46 | 62 | 78 |
| Dry Weight (Port Plate 6 with BVI Valve) [kg] | – | 37 | 45 | 52 | 70 | – |
* Values apply within optimum hydraulic oil viscosity range νopt = 16 to 36 mm²/s using standard mineral oil fluids. Maximum peak pressure of 530 bar is valid up to 10 seconds per cycle (max 50 hours total). Operating at Vg = 0 requires low-pressure charge boost to prevent cavitation.
Mechanical Installation Interface Specifications
Part 1: Recessed plug-in mounting flange dimensions (ISO 3019-2), centering pilot diameter, bolt circle pitch, and DIN 5480 splined drive shafts.
| Frame Size (NG) | Flange Standard & Code | Centering Pilot Ø (ISO 3019-2) | Hole Pattern & Pitch Circle | Primary Drive Shaft (DIN 5480) | Alternative Drive Shaft (DIN 5480) |
|---|---|---|---|---|---|
| HYH6VE028 | ISO 3019-2 (Code I2) | Ø135 mm (0 / -0.025 mm) | 2-bolt / Pitch Ø160 mm / 2x Ø13.5 mm | Code Z5: W25×1.25×18×9g (L=35 mm) | Code Z6: W30×2×14×9g (L=35 mm) |
| HYH6VE055 | ISO 3019-2 (Code P2) | Ø160 mm (0 / -0.025 mm) | 2-bolt / Pitch Ø200 mm / 2x Ø17.0 mm | Code Z6: W30×2×14×9g (L=35 mm) | Code Z8: W35×2×16×9g (L=40 mm) |
| HYH6VE080 | ISO 3019-2 (Code Y2) | Ø190 mm (0 / -0.025 mm) | 2-bolt / Pitch Ø224 mm / 2x Ø21.0 mm | Code Z8: W35×2×16×9g (L=40 mm) | Code Z9: W40×2×18×9g (L=45 mm) |
| HYH6VE107 | ISO 3019-2 (Code S2) | Ø200 mm (0 / -0.025 mm) | 2-bolt / Pitch Ø250 mm / 2x Ø21.0 mm | Code Z9: W40×2×18×9g (L=45 mm) | Code A1: W45×2×21×9g (L=50 mm) |
| HYH6VE160 | ISO 3019-2 (Code S2) | Ø200 mm (0 / -0.025 mm) | 2-bolt / Pitch Ø250 mm / 2x Ø21.0 mm | Code A1: W45×2×21×9g (L=50 mm) | Code A2: W50×2×24×9g (L=55 mm) |
| HYH6VE200 | ISO 3019-2 (Code Z4) | Ø260 mm (0 / -0.081 mm) | 4-bolt / Pitch Ø300 mm / 4x Ø22.0 mm | Code A2: W50×2×24×9g (L=55 mm) | – (Standardized on W50 Shaft) |
Fluid Connection & Port Configuration Specifications
Part 2: Hydraulic working lines A/B (SAE J518 Code 62), case drain ports T1/T2, synchronous control port G, pilot ports X/X1/X2, and gauge ports.
| Frame Size (NG) | Working Ports A & B (SAE J518) | Drain Ports T1, T2 (ISO 6149) | Synchronous Control G | Pilot Port X (HP, HZ, HA) | Pilot X1, X2 (DA0 Travel) | Gauge Ports M1 / MA, MB |
|---|---|---|---|---|---|---|
| HYH6VE028 | SAE 3/4 in (M10×1.5, 17 deep, pmax 450 bar) | M18×1.5 (12 deep, pmax 3 bar) | M14×1.5 (12 deep, pmax 450 bar) | M14×1.5 (12 deep, pmax 100 bar) | 8B-ST (ISO 8434-1, pmax 40 bar) | M1: M14×1.5 / MA,MB: – |
| HYH6VE055 | SAE 3/4 in (M10×1.5, 17 deep, pmax 530 bar) | M22×1.5 (15.5 deep, pmax 3 bar) | M14×1.5 (11.5 deep, pmax 530 bar) | M14×1.5 (11.5 deep, pmax 100 bar) | SDSC-L8×M12-F (pmax 40 bar) | M1: M14×1.5 / MA,MB: – |
| HYH6VE080 | SAE 1.0 in (M12×1.75, 17 deep, pmax 530 bar) | M22×1.5 (15.5 deep, pmax 3 bar) | M14×1.5 (11.5 deep, pmax 530 bar) | M14×1.5 (11.5 deep, pmax 100 bar) | SDSC-L8×M12-F (pmax 40 bar) | M1: M14×1.5 / MA,MB: M18×1.5 |
| HYH6VE107 | SAE 1.0 in (M12×1.75, 17 deep, pmax 530 bar) | M22×1.5 (15.5 deep, pmax 3 bar) | M14×1.5 (11.5 deep, pmax 530 bar) | M14×1.5 (11.5 deep, pmax 100 bar) | SDSC-L8×M12-F (pmax 40 bar) | M1: M14×1.5 / MA,MB: M18×1.5 |
| HYH6VE160 | SAE 1 1/4 in (M14×2, 19 deep, pmax 530 bar) | M27×2.0 (19 deep, pmax 3 bar) | M14×1.5 (11.5 deep, pmax 530 bar) | M14×1.5 (11.5 deep, pmax 100 bar) | SDSC-L8×M12-F (pmax 40 bar) | M1: M14×1.5 / MA,MB: M22×1.5 |
| HYH6VE200 | SAE 1 1/4 in (M14×2, 19 deep, pmax 530 bar) | M33×2.0 (19 deep, pmax 3 bar) | M14×1.5 (11.5 deep, pmax 530 bar) | M14×1.5 (11.5 deep, pmax 100 bar) | SDSC-L8×M12-F (pmax 40 bar) | M1: M14×1.5 / MA,MB: M22×1.5 |
Comprehensive Control Devices & Operating Characteristics
| Control Code | Operating Mode & Actuation | Functional Characteristics & Circuit Dynamics |
|---|---|---|
| HP1 / HP2 HP5 / HP6 | Proportional Control, Hydraulic (Positive / Negative Control) | Displacement is infinitely adjusted in proportion to pilot pressure applied to port X. Positive control (HP1/HP2) swivels from Vg min to Vg max as pilot pressure increases; Negative control (HP5/HP6) swivels from Vg max down to Vg min. Available with control pressure differential ΔpSt = 10 bar or 25 bar. Optionally combined with pressure control D1 or remote override. |
| EP1 / EP2 EP5 / EP6 | Proportional Control, Electric (12V / 24V DC Solenoid) | Infinitely variable displacement controlled by an electrical proportional solenoid current. Positive control (EP1/EP2) increases displacement with current; Negative control (EP5/EP6) decreases displacement towards Vg min with current. Features 100% duty cycle, DEUTSCH DT04-2P connector, and internal pressure supply from the high-pressure circuit line. |
| HZ5 / HZ7 | Two-Point Control, Hydraulic (Negative Control) | Two-position switching motor: default position at Vg max (high torque for climbing/trenching). Applying pilot pressure pX ≥ 10–18 bar to port X swivels the motor rapidly to Vg min (high speed for road transport). HZ5 is standard on sizes 28, 160, and 200; HZ7 is standard on sizes 55, 80, and 107. |
| EZ5 / EZ6 EZ7 / EZ8 | Two-Point Control, Electric (12V / 24V Switching Solenoid) | Two-position displacement switching via an on/off electric solenoid. De-energized = Vg max; Energized = Vg min. Eliminates external pilot hydraulic plumbing. EZ5/EZ6 (12V/24V) standard on sizes 28, 160, 200; EZ7/EZ8 (12V/24V) standard on sizes 55, 80, 107. Requires working pressure differential Δp ≥ 30 bar. |
| HA1 / HA2 HA3 | Automatic High-Pressure Control (Load-Dependent Swiveling) | Automatically swivels the motor from Vg min to Vg max when high-pressure load exceeds the factory setting. HA1: minimum pressure increase Δp ≤ 10 bar; HA2: pressure increase Δp = 100 bar for smooth gradeability. HA3 incorporates hydraulic remote override T3 for proportional pilot control during travel steering maneuvers. |
| DA0 | Automatic Speed-Related Control (Automotive Drive Transmission) | Negative control governed by diesel engine speed-dependent pilot pressure pSt from an A4VG/DA pump (pilot ratio pSt/pHD = 5/100). Includes integrated hydraulic travel direction changeover valve for seamless forward/reverse automotive drive feel without gear shifting. |
HENGYUHANG HYH6VE Series 65 Ordering Code Structure
| Pos. | Code Segment | Available Options | Description & Engineering Specifications |
|---|---|---|---|
| 01 | Axial Piston Unit | HYH6V | Bent-axis variable displacement hydraulic motor, nominal pressure 400 bar |
| 02 | Operating Mode | E | Plug-in motor with recessed mounting flange for gearbox integration |
| 03 | Nominal Size (NG) | 028 055 080 107 160 200 | Displacement: 28.1 cm³/rev Displacement: 54.8 cm³/rev Displacement: 80.0 cm³/rev Displacement: 107.0 cm³/rev Displacement: 160.0 cm³/rev Displacement: 200.0 cm³/rev |
| 04 | Control Devices | HP1 / HP2 HP5 / HP6 EP1 / EP2 EP5 / EP6 HZ5 / HZ7 EZ5 / EZ6 EZ7 / EZ8 HA1 / HA2 / HA3 DA0 | Proportional control, hydraulic, positive control (ΔpSt = 10 / 25 bar) Proportional control, hydraulic, negative control (ΔpSt = 10 / 25 bar) Proportional control, electric, positive control (12V / 24V DC) Proportional control, electric, negative control (12V / 24V DC) Two-point control, hydraulic, negative control (HZ5: 28/160/200; HZ7: 55/80/107) Two-point control, electric 12V / 24V DC (sizes 28, 160, 200) Two-point control, electric 12V / 24V DC (sizes 55, 80, 107) Automatic high-pressure related control (HA1: Δp≤10 bar; HA2: Δp=100 bar; HA3: with T3) Automatic speed-related control with hydraulic travel direction valve |
| 05 | Pressure Control / Override | 00 D1 T3 | Without pressure control or override Pressure control fixed setting (only with HP5, HP6, EP5, EP6) Hydraulic remote proportional override (for HA1, HA2, HA3 controls) |
| 06 | Solenoid Connector | 0 P | Without electrical connector (for hydraulic controls HP, HZ, HA, DA) DEUTSCH molded 2-pin connector DT04-2P without suppressor diode |
| 07–08 | Additional Functions | 0 0 | Standard execution without additional special functions |
| 09 | Stroking Time Damping | 0 1 4 | Without damping (standard with HP and EP) Damping orifice for HP, EP, HZ, EZ, HA with counterbalance valve BVD/BVE/BVI One-sided damping in inlet to large stroking chamber (for HA control) |
| 10 | Displacement Setting | A, B, C, D E, F, G, H J, K, L, M | Without Vg max screw, Vg min stop screw: Short (0-adjustable), Moderate, Long, Extra long Short Vg max screw, Vg min stop screw: Short (0-adjustable), Moderate, Long, Extra long Medium Vg max screw, Vg min stop screw: Short (0-adjustable), Moderate, Long, Extra long |
| 11 | Series Index | 65 | Series 6, Index 5 (latest generation high-pressure design) |
| 12 | Threads & Ports | M N | Metric ports based on ISO 6149 with O-ring seal, DIN 13 fastening threads (sizes 55–200) Metric ports based on DIN 3852 with profile seal, DIN 13 fastening threads (size 28) |
| 13 | Direction of Rotation | W | Bi-directional (reversible, viewed on drive shaft) |
| 14 | Sealing Material | V | FKM (Fluorocarbon rubber / Viton seals, high temperature rating) |
| 15 | Drive Shaft Bearing | 0 | Standard heavy-duty tapered roller bearing assembly |
| 16 | Mounting Flange | I2 P2 Y2 S2 Z4 | ISO 3019-2 135-2 (2-bolt, size 28) ISO 3019-2 160-2 (2-bolt, size 55) ISO 3019-2 190-2 (2-bolt, size 80) ISO 3019-2 200-2 (2-bolt, sizes 107 and 160) ISO 3019-2 260-4 (4-bolt, size 200) |
| 17 | Drive Shaft (DIN 5480) | Z5 / Z6 Z6 / Z8 Z8 / Z9 Z9 / A1 A1 / A2 A2 | W25×1.25 / W30×2 (size 28) W30×2 / W35×2 (size 55) W35×2 / W40×2 (size 80) W40×2 / W45×2 (size 107) W45×2 / W50×2 (size 160) W50×2 (size 200) |
| 18 | Working Ports A & B | 1 2 4 6 7 / 8 / 5 / 9 | SAE working ports A and B at rear (sizes 28–200) SAE working ports A and B at side, opposite (sizes 28–200) SAE working ports at rear, with lateral gauge ports MA, MB (sizes 107, 160) SAE working ports at bottom, with integrated counterbalance valve BVI (sizes 55–160) Port plates configured for mounted counterbalance valves BVD20, BVD25, BVE25, BVD32 |
| 19 | Valves & Flushing | 0 W Y / Z A to M | Without valve block With mounted BVD / BVE counterbalance valve With integrated brake release valve for external piping (Y) or internal ducting (Z) With mounted flushing and boost-pressure valve (calibrated orifices 3.5 to 37 L/min) |
| 20 | Speed Sensor | 0 W C / E | Without speed sensor Prepared for speed sensor DSA/20 or DST Speed sensor DSA/20 mounted (C) / Speed sensor DST mounted (E) |
| 21 | Execution Version | 0 Y / S | Standard factory version Special installation variant (Y) / Customer-specific special build (S) |
Example Standard Order Code: HYH6VE107HZ7000001A/65MWV0S2Z9100-0 (Size 107, HZ7 Two-point Control, Series 65, Metric Threads, Bi-directional, FKM Seals, ISO Pilot Ø200 mm, Splined Shaft W40×2, Rear SAE 1" Ports, Without Valve).
Direct Interchangeability & OEM Cross-Reference Matrix
HENGYUHANG HYH6VE Series 65 variable plug-in motors are 100% physically and hydraulically interchangeable with OEM Bosch Rexroth A6VE Series 65 motors, fitting existing gearbox centering pilots, bolt circles, DIN 5480 internal splines, and hydraulic port faces without modification:
| OEM Rexroth Model Code | HENGYUHANG Replacement Code | Displacement & Flange | Control Option | Shaft & Ports | Interchangeability |
|---|---|---|---|---|---|
| A6VE028HZ5000001A/65NWV0I2Z5100-0 | HYH6VE028HZ5000001A/65NWV0I2Z5100-0 | 28 cm³, Pilot Ø135 | HZ5 Two-Point Hyd. | W25×1.25, Rear SAE 3/4" | 100% Drop-In |
| A6VE055HZ7000001A/65MWV0P2Z6200-0 | HYH6VE055HZ7000001A/65MWV0P2Z6200-0 | 55 cm³, Pilot Ø160 | HZ7 Two-Point Hyd. | W30×2, Side SAE 3/4" | 100% Drop-In |
| A6VE055EP2000001A/65MWV0P2Z86Y0-0 | HYH6VE055EP2000001A/65MWV0P2Z86Y0-0 | 55 cm³, Pilot Ø160 | EP2 24V Prop. Elec. | W35×2, BVI Valve Port 6 | 100% Drop-In |
| A6VE080HZ7000001A/65MWV0Y2Z8100-0 | HYH6VE080HZ7000001A/65MWV0Y2Z8100-0 | 80 cm³, Pilot Ø190 | HZ7 Two-Point Hyd. | W35×2, Rear SAE 1" | 100% Drop-In |
| A6VE080HA2T30001A/65MWV0Y2Z9200-0 | HYH6VE080HA2T30001A/65MWV0Y2Z9200-0 | 80 cm³, Pilot Ø190 | HA2 Automatic + T3 | W40×2, Side SAE 1" | 100% Drop-In |
| A6VE107HZ7000001A/65MWV0S2Z9100-0 | HYH6VE107HZ7000001A/65MWV0S2Z9100-0 | 107 cm³, Pilot Ø200 | HZ7 Two-Point Hyd. | W40×2, Rear SAE 1" | 100% Drop-In |
| A6VE107EZ8000001A/65MWV0S2A16Y0-0P | HYH6VE107EZ8000001A/65MWV0S2A16Y0-0P | 107 cm³, Pilot Ø200 | EZ8 24V Solenoid | W45×2, BVI Valve Port 6 | 100% Drop-In |
| A6VE160HZ5000001A/65MWV0S2A1200-0 | HYH6VE160HZ5000001A/65MWV0S2A1200-0 | 160 cm³, Pilot Ø200 | HZ5 Two-Point Hyd. | W45×2, Side SAE 1 1/4" | 100% Drop-In |
| A6VE160EP2000001A/65MWV0S2A2100-0P | HYH6VE160EP2000001A/65MWV0S2A2100-0P | 160 cm³, Pilot Ø200 | EP2 24V Prop. Elec. | W50×2, Rear SAE 1 1/4" | 100% Drop-In |
| A6VE200HZ5000001A/65MWV0Z4A2200-0 | HYH6VE200HZ5000001A/65MWV0Z4A2200-0 | 200 cm³, Pilot Ø260 | HZ5 Two-Point Hyd. | W50×2, Side SAE 1 1/4" | 100% Drop-In |
| A6VE200EP2000001A/65MWV0Z4A2100-0P | HYH6VE200EP2000001A/65MWV0Z4A2100-0P | 200 cm³, Pilot Ø260 | EP2 24V Prop. Elec. | W50×2, Rear SAE 1 1/4" | 100% Drop-In |
Hydraulic Commissioning & Installation Guidelines
1. Initial Priming & Gearbox Cavity Sealing: Before commissioning, the motor case must be completely filled with filtered hydraulic fluid via the uppermost drain port (T1 or T2) and thoroughly deaerated. Ensure that the sealing O-ring on the plug-in flange pilot is properly seated and lubricated to isolate the hydraulic case fluid from the gearbox gear lubricant.
2. Case Drain Pressure Limitations: The case drain line must be routed directly to the hydraulic reservoir without check valves or restrictive filters. Maximum continuous housing pressure must not exceed 2.0 bar abs (maximum dynamic pressure peak ≤ 3.0 bar abs). Excessive case pressure reduces shaft seal life and impacts the control threshold of HP, HA, and DA controllers.
3. Low-Pressure Cavitation Prevention at Zero Swivel: During rapid decelerations or when swiveling to minimum displacement (Vg min = 0 cm³), the motor acts as a pump in closed-loop overrunning mode. A minimum boost pressure of pabs ≥ 10–14 bar must be maintained at the inlet working port to prevent cavitation, piston slipper separation, and rotary group seizure.
4. Integrated Counterbalance Valve (BVI) Tuning: For excavator track travel drives equipped with BVI valves (Port plate 6), verify during initial commissioning that the brake spool closing time and cracking pressure match the mechanical holding brake release pressure to ensure jerk-free, non-cavitative braking on slopes.
5. Fluid Cleanliness Rating: Maintain hydraulic fluid cleanliness at ISO 4406 Class 20/18/15 or cleaner. For heavy-duty construction machinery operating at 400–500 bar, use pressure-line or return-line filtration with β10 ≥ 100.
Data Verification & Technical Notes
Reference Benchmark Datasheet: Bosch Rexroth AG Technical Datasheet RE 91615 (Edition: 2023-03-28), Pages 1–50 (Variable Plug-In Motor A6VE Series 65).
Quality Guarantee & Dynamic Testing: Every HENGYUHANG HYH6VE Series 65 motor is 100% dynamically load-tested on high-pressure test stands for full displacement swiveling response, high-speed stability up to 7000+ rpm, volumetric efficiency, and case leakage under 400 bar continuous and 530 bar peak test cycles prior to dispatch.
Custom Engineering & Replacements: HENGYUHANG provides custom displacement stop calibrations, specialized gearbox pilot ring adapters, integrated speed sensor retrofits, and pre-mounted counterbalance valve blocks tailored to specific machine serial numbers.
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Technical Performance Matrix (OEM Benchmark Standard)
| Technical Parameter / Unit | Size 28 | Size 55 | Size 80 | Size 107 | Size 160 | Size 200 |
|---|---|---|---|---|---|---|
| Maximum Geometric Displacement Vg max [cm³] | 28.1 | 54.8 | 80.0 | 107.0 | 160.0 | 200.0 |
| Minimum Geometric Displacement Vg min [cm³] | 0 | 0 | 0 | 0 | 0 | 0 |
| Intermediate Swivel Displacement Vgx [cm³] | 18.0 | 35.0 | 51.0 | 68.0 | 61.0 | 76.0 |
| Nominal Continuous Working Pressure pnom [bar / psi] | 400 / 5800 | 400 / 5800 | 400 / 5800 | 400 / 5800 | 400 / 5800 | 400 / 5800 |
| Maximum Peak Working Pressure pmax [bar / psi] | 450 / 6500 | 530 / 7700 | 530 / 7700 | 530 / 7700 | 530 / 7700 | 530 / 7700 |
| Nominal Speed at Vg max (nnom) [rpm] | 5550 | 4450 | 3900 | 3550 | 3100 | 2900 |
| Maximum Speed at Vg < Vgx (nmax) [rpm] | 8750 | 7000 | 6150 | 5600 | 4900 | 4600 |
| Maximum Speed at Zero Swivel Vg = 0 (nmax) [rpm] | 10450 | 8350 | 7350 | 6300 | 5500 | 5100 |
| Maximum Inlet Flow qv max (at nnom, Vg max) [L/min] | 156 | 244 | 312 | 380 | 496 | 580 |
| Theoretical Torque at Vg max (Δp = 400 bar) [Nm] | 179 | 349 | 509 | 681 | 1019 | 1273 |
| Rotary Stiffness Vg max to Vg/2 cmin [kNm/rad] | 6 | 10 | 16 | 21 | 35 | 44 |
| Rotary Stiffness Vg/2 to Vg = 0 cmin [kNm/rad] | 18 | 32 | 48 | 65 | 105 | 130 |
| Moment of Inertia of Rotary Group JTW [kg·m²] | 0.0014 | 0.0042 | 0.0080 | 0.0127 | 0.0253 | 0.0353 |
| Case Fluid Volume [L] | 0.50 | 0.75 | 1.20 | 1.50 | 2.40 | 3.00 |
| Dry Weight (Standard Port Plate 1, 2, 4) [kg] | 19 | 28 | 36 | 46 | 62 | 78 |
| Dry Weight (Port Plate 6 with BVI Valve) [kg] | – | 37 | 45 | 52 | 70 | – |
* Values apply within optimum hydraulic oil viscosity range νopt = 16 to 36 mm²/s using standard mineral oil fluids. Maximum peak pressure of 530 bar is valid up to 10 seconds per cycle (max 50 hours total). Operating at Vg = 0 requires low-pressure charge boost to prevent cavitation.
HENGYUHANG HYH6VE Series 65 Ordering Code Structure
| Pos. | Code Segment | Available Options | Description & Engineering Specifications |
|---|---|---|---|
| 01 | Axial Piston Unit | HYH6V | Bent-axis variable displacement hydraulic motor, nominal pressure 400 bar |
| 02 | Operating Mode | E | Plug-in motor with recessed mounting flange for gearbox integration |
| 03 | Nominal Size (NG) | 028 055 080 107 160 200 | Displacement: 28.1 cm³/rev Displacement: 54.8 cm³/rev Displacement: 80.0 cm³/rev Displacement: 107.0 cm³/rev Displacement: 160.0 cm³/rev Displacement: 200.0 cm³/rev |
| 04 | Control Devices | HP1 / HP2 HP5 / HP6 EP1 / EP2 EP5 / EP6 HZ5 / HZ7 EZ5 / EZ6 EZ7 / EZ8 HA1 / HA2 / HA3 DA0 | Proportional control, hydraulic, positive control (ΔpSt = 10 / 25 bar) Proportional control, hydraulic, negative control (ΔpSt = 10 / 25 bar) Proportional control, electric, positive control (12V / 24V DC) Proportional control, electric, negative control (12V / 24V DC) Two-point control, hydraulic, negative control (HZ5: 28/160/200; HZ7: 55/80/107) Two-point control, electric 12V / 24V DC (sizes 28, 160, 200) Two-point control, electric 12V / 24V DC (sizes 55, 80, 107) Automatic high-pressure related control (HA1: Δp≤10 bar; HA2: Δp=100 bar; HA3: with T3) Automatic speed-related control with hydraulic travel direction valve |
| 05 | Pressure Control / Override | 00 D1 T3 | Without pressure control or override Pressure control fixed setting (only with HP5, HP6, EP5, EP6) Hydraulic remote proportional override (for HA1, HA2, HA3 controls) |
| 06 | Solenoid Connector | 0 P | Without electrical connector (for hydraulic controls HP, HZ, HA, DA) DEUTSCH molded 2-pin connector DT04-2P without suppressor diode |
| 07–08 | Additional Functions | 0 0 | Standard execution without additional special functions |
| 09 | Stroking Time Damping | 0 1 4 | Without damping (standard with HP and EP) Damping orifice for HP, EP, HZ, EZ, HA with counterbalance valve BVD/BVE/BVI One-sided damping in inlet to large stroking chamber (for HA control) |
| 10 | Displacement Setting | A, B, C, D E, F, G, H J, K, L, M | Without Vg max screw, Vg min stop screw: Short (0-adjustable), Moderate, Long, Extra long Short Vg max screw, Vg min stop screw: Short (0-adjustable), Moderate, Long, Extra long Medium Vg max screw, Vg min stop screw: Short (0-adjustable), Moderate, Long, Extra long |
| 11 | Series Index | 65 | Series 6, Index 5 (latest generation high-pressure design) |
| 12 | Threads & Ports | M N | Metric ports based on ISO 6149 with O-ring seal, DIN 13 fastening threads (sizes 55–200) Metric ports based on DIN 3852 with profile seal, DIN 13 fastening threads (size 28) |
| 13 | Direction of Rotation | W | Bi-directional (reversible, viewed on drive shaft) |
| 14 | Sealing Material | V | FKM (Fluorocarbon rubber / Viton seals, high temperature rating) |
| 15 | Drive Shaft Bearing | 0 | Standard heavy-duty tapered roller bearing assembly |
| 16 | Mounting Flange | I2 P2 Y2 S2 Z4 | ISO 3019-2 135-2 (2-bolt, size 28) ISO 3019-2 160-2 (2-bolt, size 55) ISO 3019-2 190-2 (2-bolt, size 80) ISO 3019-2 200-2 (2-bolt, sizes 107 and 160) ISO 3019-2 260-4 (4-bolt, size 200) |
| 17 | Drive Shaft (DIN 5480) | Z5 / Z6 Z6 / Z8 Z8 / Z9 Z9 / A1 A1 / A2 A2 | W25×1.25 / W30×2 (size 28) W30×2 / W35×2 (size 55) W35×2 / W40×2 (size 80) W40×2 / W45×2 (size 107) W45×2 / W50×2 (size 160) W50×2 (size 200) |
| 18 | Working Ports A & B | 1 2 4 6 7 / 8 / 5 / 9 | SAE working ports A and B at rear (sizes 28–200) SAE working ports A and B at side, opposite (sizes 28–200) SAE working ports at rear, with lateral gauge ports MA, MB (sizes 107, 160) SAE working ports at bottom, with integrated counterbalance valve BVI (sizes 55–160) Port plates configured for mounted counterbalance valves BVD20, BVD25, BVE25, BVD32 |
| 19 | Valves & Flushing | 0 W Y / Z A to M | Without valve block With mounted BVD / BVE counterbalance valve With integrated brake release valve for external piping (Y) or internal ducting (Z) With mounted flushing and boost-pressure valve (calibrated orifices 3.5 to 37 L/min) |
| 20 | Speed Sensor | 0 W C / E | Without speed sensor Prepared for speed sensor DSA/20 or DST Speed sensor DSA/20 mounted (C) / Speed sensor DST mounted (E) |
| 21 | Execution Version | 0 Y / S | Standard factory version Special installation variant (Y) / Customer-specific special build (S) |
Example Standard Order Code: HYH6VE107HZ7000001A/65MWV0S2Z9100-0 (Size 107, HZ7 Two-point Control, Series 65, Metric Threads, Bi-directional, FKM Seals, ISO Pilot Ø200 mm, Splined Shaft W40×2, Rear SAE 1" Ports, Without Valve).
Direct Interchangeability & OEM Cross-Reference Matrix
HENGYUHANG HYH6VE Series 65 variable plug-in motors are 100% physically and hydraulically interchangeable with OEM Bosch Rexroth A6VE Series 65 motors, fitting existing gearbox centering pilots, bolt circles, DIN 5480 internal splines, and hydraulic port faces without modification:
| OEM Rexroth Model Code | HENGYUHANG Replacement Code | Displacement & Flange | Control Option | Shaft & Ports | Interchangeability |
|---|---|---|---|---|---|
| A6VE028HZ5000001A/65NWV0I2Z5100-0 | HYH6VE028HZ5000001A/65NWV0I2Z5100-0 | 28 cm³, Pilot Ø135 | HZ5 Two-Point Hyd. | W25×1.25, Rear SAE 3/4" | 100% Drop-In |
| A6VE055HZ7000001A/65MWV0P2Z6200-0 | HYH6VE055HZ7000001A/65MWV0P2Z6200-0 | 55 cm³, Pilot Ø160 | HZ7 Two-Point Hyd. | W30×2, Side SAE 3/4" | 100% Drop-In |
| A6VE055EP2000001A/65MWV0P2Z86Y0-0 | HYH6VE055EP2000001A/65MWV0P2Z86Y0-0 | 55 cm³, Pilot Ø160 | EP2 24V Prop. Elec. | W35×2, BVI Valve Port 6 | 100% Drop-In |
| A6VE080HZ7000001A/65MWV0Y2Z8100-0 | HYH6VE080HZ7000001A/65MWV0Y2Z8100-0 | 80 cm³, Pilot Ø190 | HZ7 Two-Point Hyd. | W35×2, Rear SAE 1" | 100% Drop-In |
| A6VE080HA2T30001A/65MWV0Y2Z9200-0 | HYH6VE080HA2T30001A/65MWV0Y2Z9200-0 | 80 cm³, Pilot Ø190 | HA2 Automatic + T3 | W40×2, Side SAE 1" | 100% Drop-In |
| A6VE107HZ7000001A/65MWV0S2Z9100-0 | HYH6VE107HZ7000001A/65MWV0S2Z9100-0 | 107 cm³, Pilot Ø200 | HZ7 Two-Point Hyd. | W40×2, Rear SAE 1" | 100% Drop-In |
| A6VE107EZ8000001A/65MWV0S2A16Y0-0P | HYH6VE107EZ8000001A/65MWV0S2A16Y0-0P | 107 cm³, Pilot Ø200 | EZ8 24V Solenoid | W45×2, BVI Valve Port 6 | 100% Drop-In |
| A6VE160HZ5000001A/65MWV0S2A1200-0 | HYH6VE160HZ5000001A/65MWV0S2A1200-0 | 160 cm³, Pilot Ø200 | HZ5 Two-Point Hyd. | W45×2, Side SAE 1 1/4" | 100% Drop-In |
| A6VE160EP2000001A/65MWV0S2A2100-0P | HYH6VE160EP2000001A/65MWV0S2A2100-0P | 160 cm³, Pilot Ø200 | EP2 24V Prop. Elec. | W50×2, Rear SAE 1 1/4" | 100% Drop-In |
| A6VE200HZ5000001A/65MWV0Z4A2200-0 | HYH6VE200HZ5000001A/65MWV0Z4A2200-0 | 200 cm³, Pilot Ø260 | HZ5 Two-Point Hyd. | W50×2, Side SAE 1 1/4" | 100% Drop-In |
| A6VE200EP2000001A/65MWV0Z4A2100-0P | HYH6VE200EP2000001A/65MWV0Z4A2100-0P | 200 cm³, Pilot Ø260 | EP2 24V Prop. Elec. | W50×2, Rear SAE 1 1/4" | 100% Drop-In |
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