KC45 Danfoss Series 45 Variable Piston Motor 260Bar

Product Overview:

The KC45 series (perfectly matching the original Danfoss Series 45 K Frame) serves as a core hydraulic power unit engineered specifically for medium-to-high-pressure mobile machinery. As a high-performance variable axial piston unit (widely searched and utilized in both pump- and motor-driven circuits), it is manufactured in strict accordance with original technical specifications. We provide complete solutions featuring 100% Drop-in Interchangeability for complex configurations like KC45DNER and beyond. Backed by our advanced fluid control engineering, every single unit undergoes rigorous 100% simulated operating condition testing prior to shipment. This ensures absolute reliability under extreme loads, severe vibrations, and harsh working environments, significantly minimizing downtime and optimizing procurement costs.

Technical Specifications:

• Complete Model Codes: KC45DNERNFF55SNNAFF18NNNNNN / KC45DNERNFF07SNNAFF18NNNNNN

• Base Series: Danfoss Series 45 Variable Piston Unit (K Frame)

• Displacement: 45 cm³/rev

• Rated Operating Pressure: 260 bar (3770 psi) – Continuous

• Maximum Peak Pressure: 310 bar (4500 psi) – Intermittent

• Max Continuous Speed: 2600 RPM

• Control Options: Pressure Compensated (PC) / Load Sensing (LS)

• Rotation: Right-hand / Clockwise (R)

• Shaft & Flange Mounting: Standard SAE industrial splined shaft and mounting flange

• Approximate Weight: 22.5 kg

Key Technical Advantages:

• 100% Drop-in Interchangeability: The external mounting dimensions, port configurations, and internal core rotational groups (cylinder block, pistons, valve plate) are precision-manufactured to strict reverse-engineering tolerances. It can directly replace the original KC45 units with zero need for pipe modifications or bracket adjustments.

• 100% Simulated Condition Testing: We eliminate guesswork by refusing random batch checks. Every single hydraulic unit is subjected to comprehensive test bench protocols—spanning full pressure ranges (0-310 bar), variable RPMs, and shock loads—to guarantee optimal volumetric efficiency and zero internal leakage risks.

• Bimetal Valve Plate & High Volumetric Efficiency: Featuring advanced spherical lapping between the cylinder block and the high-pressure bimetal wear-resistant valve plate, the unit maintains superior volumetric efficiency and remarkable low-noise operation even under continuous 260 bar conditions.

• Highly Responsive Variable Control System: The optimized PC/LS control valves offer extremely agile response times, providing precise displacement adjustments based on instantaneous load changes. This drastically cuts down parasitic power loss and heat generation, elevating the overall energy efficiency of the machine.

Application Areas:

• Agricultural Machinery: High-horsepower tractors, combine harvesters, hydraulically driven implements.

• Construction Equipment: Excavator swing/travel drives, skid steer loaders, motor graders.

• Material Handling: Telehandlers and main hydraulic drive circuits of heavy-duty forklifts.

• Forestry & Mining Equipment: Forestry harvester chassis drives, drill rig rotary head hydraulic circuits.

Expert Maintenance Tips:

• Initial Case Filling & Bleeding: Before the very first start-up, you must manually fill the unit’s casing with clean hydraulic fluid through the uppermost drain port. Dry starting is strictly prohibited, as dry friction will instantaneously destroy the valve plate and piston shoes.

• Strict Fluid Cleanliness: Variable piston systems are highly sensitive to contamination. Always maintain hydraulic fluid cleanliness to at least ISO 4406 18/16/13 standards. The installation of absolute 10-micron fiberglass filters in the system is highly recommended.

• Case Drain Pressure Monitoring: Ensure the case drain line is routed directly and smoothly below the fluid level in the reservoir. Continuous case pressure must not exceed 3 bar (43.5 psi); excessive back pressure will cause premature failure, leakage, or blow-out of the main shaft lip seal.