Overview

This document presents targeted engineering solutions for hedge and grasscutter mowers, focusing on fixed displacement axial piston pumps and motors designed for open circuit hydraulic systems. The products offer high performance, flexibility, and compact design, integrating advanced control features to enhance machine efficiency and reliability.

Key Features

• Power output up to 63 kW (85 Hp) at maximum speed.
• Reversible rotation with integral anti-shock valves for motor protection.
• Compliance with European and SAE standard mounting flanges.
• Options for side or rear inlet ports.
• Compact size enabling direct coupling to mower rotors.
• Integrated pump functions including a three-position electrically controlled valve with relief valve and electronic control of rotor start-up and stop ramps.
• Auxiliary gear pump available with cast-iron or aluminum body sharing common suction.
• Long-life hydraulic components equipped with Ikron-Casappa filters meeting global standards.

Technical Specifications - Pumps

The pumps are fixed displacement axial piston types with swash plate design, suitable for open circuit use with HL or HLP mineral oil-based hydraulic fluids (DIN 51524). Key parameters include:

• Theoretical displacement ranges from 27 to 48.2 cm³/rev.
• Maximum continuous outlet pressure of 280 bar, intermittent up to 315 bar, and peak at 350 bar.
• Maximum speed up to 2600 min⁻¹ (3100 min⁻¹ with inlet supercharging).
• Theoretical maximum delivery ranges from 70.2 to 125 l/min at 2600 min⁻¹.
• Maximum theoretical power output ranges from 32.1 kW (43.7 Hp) to 58.5 kW (79.6 Hp) at 280 bar and 2600 min⁻¹.
• Maximum torque ranges from 120 to 214 Nm at 280 bar.
• Operating temperature range with Buna seals: -25 °C to +90 °C.
• Mass approximately 35 kg without oil.

Technical Specifications - Motors

The fixed displacement axial piston motors feature reversible rotation and external drain, designed for open circuit applications with similar hydraulic fluids. Highlights include:

• Theoretical displacement from 22 to 30.2 cm³/rev.
• Maximum continuous inlet pressure of 280 bar, intermittent 315 bar, peak 350 bar.
• Maximum speed ranges from 4500 to 4900 min⁻¹ depending on model.
• Theoretical maximum delivery from 108 to 136 l/min at maximum speed.
• Theoretical maximum power output ranges from 24.64 kW (33.5 Hp) to 45.09 kW (61.3 Hp) at 280 bar.
• Maximum torque from 98 to 134 Nm at 280 bar.
• Starting torque values provided for 250 bar pressure.
• Operating temperature range with Buna seals: -25 °C to +90 °C.
• Mass approximately 14 kg without oil.

Auxiliary Gear Pumps

Auxiliary gear pumps with cast-iron bodies (KAPPA series) are available in various sizes, with dimensions provided for ordering. These pumps share common suction with the main pump and support integrated hydraulic functions.

Design and Control Features

• Electrically controlled three-position valve integrated on the pump for precise control of rotor start-up and stop ramps.
• Anti-shock valves integrated on the motor to protect against pressure spikes.
• Electronic control components include an electronic board, control box, cable kit, and electrically controlled valve, supported by dedicated programming software.
• Compact motor size allows direct coupling to mower rotors without restricting accessory use.

Filtration and Fluid Recommendations

• Recommended hydraulic fluid cleanliness class is 16/13 according to ISO 4406 for maximum pump life.
• Satisfactory operation is also possible with contamination class 19/15 (ISO 4406) or cleanliness grade 9 (NAS 1638).
• Casappa recommends using its own production filters to ensure optimal filtration.
• Optimal fluid viscosity range is between 15 and 35 mm²/s (cSt), with functional limits from 10 mm²/s at 90 °C to 1500 mm²/s at start-up (-25 °C).

Standards and Compliance

The pumps and motors comply with European and SAE mounting flange standards, ensuring compatibility with a wide range of agricultural machinery. The design supports open circuit hydraulic systems, avoiding limitations and issues associated with closed circuits.

Ordering and Support

For orders and further technical assistance, contact Casappa sales departments located in Italy, USA, Germany, and France. Contact details and website information are provided.