KP30.43-04S3-LGF/GF/30.27-LGF/GF-D | Casappa Twin Pump 43.98+26.7cc

Product Overview

The KP30.43-04S3-LGF/GF/30.27-LGF/GF-D is a flagship twin pump model of the CASAPPA KAPPA 30 Compact series high-pressure cast iron gear pumps, specifically designed for excavator and wheel loader combined-action hydraulic systems. Founded in 1952, CASAPPA is a globally recognized manufacturer of hydraulic pumps and motors, with products widely applied in construction machinery, material handling, agricultural machinery, and industrial applications.

This model features a twin gear pump configuration, integrating a KP30•43 main pump with a KP30•27 secondary pump. The KAPPA 30 Compact series features two-piece cast iron construction with both the pump body and mounting flange manufactured from high-strength cast iron for robust structural rigidity. The twin design supplies two independent hydraulic circuits simultaneously—such as excavator travel motors and implement systems—significantly simplifying system layout.

Model code KP30.43-04S3-LGF/GF/30.27-LGF/GF-D breakdown:

• KP30.43: KAPPA 30 series main pump, 43 size, 43.98 cm³/rev displacement

• 04S3: Shaft and flange configuration code

• LGF/GF: Main pump port orientation and mounting interface specification

• 30.27: Secondary pump, 27 size, 26.7 cm³/rev displacement

• LGF/GF: Secondary pump port orientation and mounting interface specification

• D: Rotation direction – Clockwise

The KAPPA 30 Compact series covers displacements from 21.99 to 73.82 cm³/rev, with peak pressures up to 325 bar. The compact design allows multiple functions to be integrated within limited space.

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. The KP30.43-04S3-LGF/GF/30.27-LGF/GF-D offers 100% direct interchangeability with original CASAPPA KAPPA 30 series pumps of the same model—no modification required. Every unit undergoes 100% simulated load testing before shipment, ensuring performance validation under real-world operating conditions.

Technical Specifications

Main Pump (KP30•43) Specifications:

• Model: KP30.43-04S3-LGF/GF/30.27-LGF/GF-D

• Brand Series: CASAPPA KAPPA 30 Compact Series

• Pump Type: Cast iron external gear pump (twin configuration)

• Body Material: High-strength cast iron (two-piece construction)

• Body Design: NSL / NSC

• Main Pump Displacement: 43.98 cm³/rev (2.68 in³/rev)

• Maximum Rated Continuous Pressure (p₂): 300 bar (4350 psi)

• Maximum Peak Pressure (p₃): 320 bar (4640 psi)

• Maximum Speed: 3000 min⁻¹

• Minimum Speed: 350 min⁻¹

Secondary Pump (KP30•27) Specifications:

• Secondary Pump Displacement: 26.7 cm³/rev (1.63 in³/rev)

• Maximum Rated Continuous Pressure (p₂): 300 bar (4350 psi)

• Maximum Peak Pressure (p₃): 320 bar (4640 psi)

• Maximum Speed: 3000 min⁻¹

• Minimum Speed: 350 min⁻¹

General Specifications:

• Total Displacement (Both Stages): 70.68 cm³/rev

• Rotation Direction: Clockwise (D designation)

• Mounting Flange: 4-bolt European standard flange

• Drive Shaft: Tapered 1:8

• Fluid Media: Mineral-based hydraulic oil

• Fluid Temperature Range: -25°C to +80°C

• Weight: Approx. 20 kg

Note: Pressure and displacement data above are based on CASAPPA KAPPA 30 series official technical specifications. Different configuration codes (04S3, LGF/GF, etc.) correspond to different shaft types, flange specifications, and port configurations. Refer to the pump nameplate for exact specifications.

Key Technical Advantages

1. High-Strength Two-Piece Cast Iron Construction – Withstands Harsh Construction Equipment Conditions

The KAPPA 30 Compact series features pump bodies and mounting flanges manufactured from high-strength cast iron with two-piece construction. 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. The compact design allows multiple functions to be integrated within limited space.

2. Integrated Twin Pump Design – Simplifies Excavator Hydraulic System Layout

This model integrates a KP30•43 main pump with a KP30•27 secondary pump into a single assembly, supplying pressure oil to two independent hydraulic circuits simultaneously—such as excavator travel motors and implement systems. This twin design significantly reduces hydraulic circuit complexity and the number of fittings, minimizes leak points, and saves valuable installation space.

3. High Pressure Capability – Both Stages Deliver 300 bar Continuous Pressure

Both the main and secondary pumps of the KAPPA 30 Compact series deliver 300 bar rated continuous pressure with 320 bar peak pressure capability. This twin-pump combination provides powerful and stable hydraulic output for heavy-duty excavator and loader operations.

4. Low-Noise Operation with Long Service Life

The KAPPA series is renowned for high operating pressure, low noise, and long service life. Optimized gear tooth profiles and precision machining ensure low-noise, low-pulsation operation even at high pressures. High-strength cast iron construction and precision-machined gears guarantee component durability, significantly extending pump service life.

5. Flexible Mounting Configurations with OEM Interchangeability

KAPPA 30 series offers a wide range of mounting flange, shaft, and port combinations compliant with SAE and European standards. The 04S3 configuration provides a tapered 1:8 shaft with 4-bolt European standard flange, perfectly matching the original mounting dimensions of various excavators and wheel loaders. This pump offers direct replacement for original CASAPPA products with 100% interchangeability.

Application Areas

• Excavators—travel hydraulic systems and implement hydraulic systems (boom, arm, bucket)

• Wheel Loaders—bucket lift and steering hydraulic systems

• Bulldozers—dozing hydraulic systems

• Telehandlers—such as Manitou MLT732

• Aerial Work Platforms—such as Haulotte HTL 3510

• Material Handling Equipment—reach stackers, heavy forklifts hydraulic systems

Expert Maintenance Tips

Model Code Verification (verify each element):

Before installation, carefully verify the complete model code on the pump nameplate—KP30.43-04S3-LGF/GF/30.27-LGF/GF-D—and confirm the following:

• KP30.43: KAPPA 30 series main pump, 43.98 cm³/rev displacement.

• 04S3: Shaft and flange configuration code – verify the shaft type (tapered 1:8) matches the original.

• LGF/GF: Main pump port configuration – verify port specifications match piping.

• 30.27: Secondary pump, 26.7 cm³/rev displacement.

• LGF/GF: Secondary pump port configuration.

• D: Rotation direction – Clockwise.

Verify Rotation Direction:

“D” indicates clockwise rotation (viewed from shaft end). Confirm that the drive shaft rotation matches the direction code in the model. KAPPA 30 series offers both clockwise (D) and counter-clockwise (S) rotation options. Incorrect rotation will prevent pressure build-up and may damage internal gears and bearings.

Identify Twin Pump Inlet and Outlet Ports:

The twin pump features two independent inlet and outlet port sets. During installation, carefully distinguish between the main pump (KP30.43, LGF/GF configuration) and secondary pump (30.27, LGF/GF configuration) port markings to ensure correct hose connections. Incorrect port connections will cause abnormal system pressure or pump damage.

Mounting Flange and Drive Shaft Matching:

Verify that the equipment-side flange type and shaft specification match the pump configuration before installation. This model features a tapered 1:8 shaft with 4-bolt European standard flange. Port options include 4 x M10 ports (51mm PCD) and 4 x M8 ports (40mm PCD).

Coupling Alignment Precision:

Ensure shaft concentricity between the pump and drive shaft is within 0.05 mm during installation. The KAPPA 30 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.

Suction Line and Fluid Requirements:

Ensure the suction line is properly sealed with no air leaks and the suction filter is not clogged. Fluid temperature should be maintained within -25°C to +80°C. For twin pumps, each suction line should have its own independent filter to prevent one line from starving the other.

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 twin pump must be primed separately to ensure adequate lubrication for both stages. Running the pump dry will cause irreversible damage to gears and bearings.

Oil Cleanliness and Regular Maintenance:

Replace hydraulic oil and return filters every 1,000 operating hours or per equipment manufacturer recommendations. Using hydraulic oil with proper cleanliness will significantly extend pump service life. Regularly monitor pump body temperature—if it consistently exceeds +80°C, inspect the system cooling and relief valve settings.