KP30.51D0-06S8-LME/OF-N-CSC | Casappa Gear Pump 51.83cc 290bar

Product Overview

The KP30.51D0-06S8-LME/OF-N-CSC is a flagship model of the CASAPPA KAPPA 30 series high-pressure cast iron hydraulic gear pumps, widely used in Volvo loaders, excavators, and other construction machinery hydraulic systems. Featuring a high-strength cast iron body and compact structural design, the pump delivers excellent volumetric efficiency and long-term reliability under high working pressures.

This model is a dual gear pump configuration, with “KP30.51” identifying the main pump with a displacement of 51.83 cm³/rev; “D0” denotes clockwise rotation (D = clockwise); “06S8” specifies the shaft and flange configuration; “LME/OF” identifies port orientation and mounting interface; “N” indicates without external bearing; and “CSC” denotes the specific seal and configuration version. The dual pump design provides two independent hydraulic outputs simultaneously—ideal for complex hydraulic systems requiring multiple independent oil sources or combined actions.

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. The KP30.51D0-06S8-LME/OF-N-CSC offers 100% direct interchangeability with original CASAPPA pumps of the same model (CASAPPA OEM No. 11881939, VOE 11881939)—no modification required. Every unit undergoes 100% simulated load testing before shipment, ensuring performance validation under real-world operating conditions.

Technical Specifications 

• Model: KP30.51D0-06S8-LME/OF-N-CSC

• Brand Series: CASAPPA KAPPA 30 Series

• Main Pump Displacement: 51.83 cm³/rev (3.16 in³/rev)

• Body Design: NSL / NSC

• Rated Continuous Pressure (p₂) : 290 bar (4205 psi)

• Peak Pressure (p₃) : 310 bar (4495 psi)

• Maximum Speed: 2500 min⁻¹

• Minimum Speed: 350 min⁻¹

• Rotation Direction: Clockwise (D0 designation)

• Body Material: High-strength cast iron

• Seal Material: NBR (Nitrile Butadiene Rubber)

• Pump Type: Dual external gear pump

• Fluid Media: Mineral hydraulic oil

• OEM Cross-Reference Numbers: 11881939, VOE 11881939

• Compatible Equipment: Volvo loaders, excavators, and more

Note: The secondary pump specifications are not fully identified from the complete model code. The above parameters are based on the KP30.51 main pump data. Please provide the complete secondary pump model suffix for detailed specifications of the secondary stage.

Key Technical Advantages

1. High-Strength Cast Iron Body for Extreme Conditions

The KP30 series features a high-quality cast iron body with rigorous quality control on all critical components, delivering robust structural rigidity capable of withstanding higher pressures and impacts. Compared to aluminum alloy bodies, cast iron provides superior structural stability and deformation resistance under extreme conditions of high temperature, high pressure, and high impact. With a rated pressure of 290 bar and peak pressure of 310 bar, this pump proves its reliability in heavy-duty applications.

2. Integrated Dual Pump Design Simplifies System Layout

The KP30.51D0-06S8-LME/OF-N-CSC integrates two independent gear pump units into a single assembly, delivering two independent hydraulic outputs simultaneously. This dual design significantly reduces hydraulic circuit complexity and the number of fittings, minimizes leak points, and saves installation space. The main pump provides high flow output while the secondary pump supplies auxiliary flow—perfectly matching the composite control requirements of loaders, excavators, and other construction equipment.

3. High Volumetric Efficiency with NBR Seals for Enhanced Oil Resistance

Optimized gear tooth profiles and precision machining processes effectively reduce internal leakage and friction losses, ensuring high volumetric efficiency. NBR (Nitrile Butadiene Rubber) seals enhance oil resistance and wear resistance, ensuring sealing reliability during long-term high-load operation, particularly in mineral hydraulic oil media.

4. Long-Life Bearings and Precision-Ground Gears

High-load-capacity bearing systems combined with precision-ground gears ensure long-term stable operation under 290 bar continuous high-pressure conditions. High-strength materials and precision machining guarantee component durability, significantly extending pump service life. The compact component design ensures structural rigidity under high working pressures.

5. Flexible Mounting Configurations with OEM Interchangeability

The 06S8 configuration provides specific shaft and flange interfaces that match the original mounting dimensions of Volvo loaders and excavators. This pump is fully compatible with CASAPPA OEM No. 11881939 and VOE 11881939, delivering 100% direct interchangeability.

Application Areas

• Volvo Loaders—hydraulic implements and steering systems

• Volvo Excavators—combined-action hydraulic control systems

• Construction Machinery—hydraulic systems for wheeled and tracked equipment

• Mining Machinery—hydraulic power transmission in extreme environments

• Industrial Hydraulic Systems—complex hydraulic control systems requiring dual independent outputs

Expert Maintenance Tips

1. Verify Model Configuration Before Installation

Carefully verify the complete model code on the pump nameplate—KP30.51D0-06S8-LME/OF-N-CSC—and confirm that all configuration codes (rotation D0, shaft 06S8, ports LME/OF, bearing N, seal version CSC) match the original pump exactly. Any configuration discrepancy may result in installation mismatch or substandard performance. Pay special attention to OEM cross-reference numbers 11881939 and VOE 11881939.

2. Confirm Rotation Direction

Verify the drive shaft rotation direction prior to installation. The “D0” designation indicates clockwise rotation. Mismatched rotation direction will cause immediate pump failure and may introduce metal particles into the entire hydraulic system. Double-check the original pump’s model designation and rotation direction before installation.

3. Identify Dual Pump Inlet and Outlet Ports

The dual pump features two independent inlet and outlet port sets. During installation, carefully distinguish between the main pump and secondary pump port markings (LME/OF configuration) to ensure correct hose connections. Incorrect port connections will cause abnormal system pressure or pump damage.

4. Coupling Alignment Precision

Ensure shaft concentricity between the pump and drive shaft is within 0.05 mm during installation. The KP30 series cast iron body has high rigidity and is particularly sensitive to alignment accuracy. Excessive misalignment will cause premature bearing wear, seal leakage, or even shaft fracture. Use flexible couplings and dial gauges for precise alignment.

5. Suction Line and Filter Configuration

KP30 series gear pumps are sensitive to suction resistance. Recommended suction vacuum does not exceed 0.3 bar (absolute pressure), with suction filter rating no finer than 100μm. For dual pumps, each suction line should have its own independent filter to prevent one line from starving the other.

6. First-Start Priming Procedure

After new pump installation or system overhaul, perform priming before first start. Jog the pump at low speed and low pressure until the pump body is fully filled with oil and air is purged, then gradually increase to rated speed and working pressure. Both cavities of the dual pump must be primed separately to ensure adequate lubrication for both main and secondary pumps.

7. Regular Maintenance and Oil Cleanliness Management

Replace hydraulic oil and return filters every 1,000 operating hours or per equipment manufacturer recommendations. Using hydraulic oil with cleanliness not lower than ISO 4406 18/16/13 will significantly extend pump service life. Monitor pump body temperature regularly; if it consistently exceeds +80°C, inspect the system cooling and relief valve settings.