Danfoss 90R180 Axial Piston Pump | 90R180KA5NN80SCF1J03FAC292922

The 90 Series high-pressure axial piston pumps manufactured by Chengyuan Hydraulic are heavy-duty hydrostatic drive components engineered to be fully compatible with Danfoss (Sauer-Danfoss) industrial benchmarks. This series is predominantly utilized as the prime mover for track propulsion and high-torque rotary drives on large-scale mobile machinery (e.g., asphalt pavers, rotary drilling rigs, and concrete mixers). For elite high-displacement configurations such as 90R180 (Right-hand rotation), 90L180 (Left-hand rotation), and the precision-coded string 90R180KA5NN80SCF1J03FAC292922, we perfectly replicate original hydrostatic control interfaces. Every 180cc pump undergoes 100% simulated closed-loop load testing and charge pressure synchronization at full rated thresholds before delivery, guaranteeing exceptional volumetric performance under intense mechanical strain and delivering proven 100% original-place interchangeability.

Technical Specifications:

• Core Product Series: Danfoss 90 Series Axial Piston Closed-Loop Pumps

• Exact Order Profile Code: 90R180KA5NN80SCF1J03FAC292922

• Nominal Displacement Frame: 180.0 $cm^3/rev$ (11.0 $in^3/rev$)

• Circuit Topology: Closed Loop Architecture

• Direction of Rotation Index: 90R designates Clockwise (Right-hand) / 90L designates Counter-clockwise (Left-hand)

• Rated Continuous Pressure: 42 MPa (420 bar / 6090 psi)

• Maximum Peak Pressure Limit: 48 MPa (480 bar / 6960 psi)

• Maximum Rated Shaft Velocity: 3400 rpm

• Maximum Allowed Input Speed: 3550 rpm (under full displacement zero-load or intermittent cycles)

• Control Modulation Strategy (KA): MDC Profile (Manual Displacement Control) configured with neutral safety switches and solenoid back-up linkages

• Integrated Charge Pump Grid (80): Houses an 80 $cm^3/rev$ high-capacity charge pump ensuring uninterrupted low-loop replenishment and robust servo supply

Key Technical Advantages:

• Hydrostatically Balanced Cylinder & Valve Plate Interface: The piston shoe surfaces and valve plate faces undergo micron-level anti-wear texturing paired with rigorous induction hardening. This configuration optimizes hydrostatic balance principles, maintaining a rigid, coherent fluid film under continuous 42 MPa loads to eliminate cylinder scoring during elevated oil temperature transients.

• High-Dynamic Double-Acting Swashplate Geometry: The displacement variation mechanism is actuated via integrated dual-acting hydraulic servo cylinders acting on a robust tilting cradle. Supported by an optimized anti-overturning bearing matrix, the pump delivers rapid stroke transitions and highly linear control curves with near-zero deadband anomalies during bi-directional shifting.

• All-Inclusive Integrated Valve Block Blockhouse: The rear cover integrates all vital protection manifolds required by a closed-loop system: including dual-direction High-Pressure Relief Valves (HPRVs), a Charge Pressure Relief Valve, and an internal loop bypass mechanism. This consolidation slashes host pipeline routing space while eliminating transient fluid shocks.

• Oversized Tapered Roller Main Shaft Bearings: The front mounting assembly houses heavy-duty tapered roller bearings engineered with massive dynamic load capacities. This allows the drive shaft to support severe radial and axial external forces transmitted by direct engine flywheel couplings or gear drives, boosting cumulative mechanical efficiency.

Application Areas:

• Heavy Roadway & Construction Rigs: High-torque main track propulsion drives for asphalt pavers and cold planers, alongside closed-loop power-head systems on rotary piling rigs.

• Lifting & Material Handling Equipment: Main and auxiliary heavy hoist drum circuits for large-scale truck cranes and heavy crawler cranes.

• High-Stiffness Industrial Hydrostatic Drives: Marine deck winches, heavy bulk mooring machinery, and closed-loop hydrostatic power units for sub-surface mining conveyors.

Expert Maintenance Tips:

• Mandatory Air-Bleeding and Casing Priming Protocol: Due to the massive volume of the 180cc frame, the pump housing must be completely pre-filled with clean hydraulic fluid through the highest available case port before initial crank. Disconnect the engine fuel injection coils or use short motor bumps to spin the charge pump without activating the main loop until charge pressure reads a stable 2.0-2.4 bar and is completely purged of foam.

• Closed-Loop Fluid Cleanliness Thresholds: Closed-loop circuits recirculate fluid internally, meaning any abrasive particulates will repeatedly damage the precision running surfaces. It is a strict system requirement to place high-efficiency filtration on the charge or return loop, rated at $\max \beta_{10} \ge 200$, maintaining fluid cleanliness thresholds to at least ISO 4406 18/15/12.

• Validation of High-Pressure Multifunctional Valves: If the host machine exhibits tracking drift or sluggish torque output under load, avoid manipulating the MDC servo linkage blindly. First place inline pressure gauges to verify the cracking limits of the high-pressure relief valves. Adjustments must be executed in micro-increments to prevent losing critical high-pressure protection limits.