Hemos ORCA
Drive-on mounting chassis with hydraulic boom for tractors
Robust and versatile
Rotation — slewing ring
Rotation — rotary cylinder
PTO drive
Drive-on mounting chassis with hydraulic boom for tractors
The ORCA has been part of the HEMOS standard production range for many years. The machine stands out for its reliability, robust construction and high ease of operation. The ORCA was developed specifically for professional verge, green area and forest maintenance. The machine can be fitted to a range of tractors and, thanks to its own pump unit driven by the PTO, offers high hydraulic performance.
ORCA — how it is built
The ORCA is a drive-over mounting chassis for tractors, developed for professional care of roadsides, green areas and forests. Thanks to its own pump unit, robust construction and different boom variants, the machine can be adapted to a wide range of applications. The complete chassis can also be attached or detached within a few minutes, so the tractor remains available for other work too.
Mounting on the tractor
The tractor and ORCA are fully matched to each other. If necessary, the right-hand side of the tractor is cleared for the boom, for example by relocating the exhaust system and other components to the left-hand side. In addition, mounting points for the chassis are fitted beneath the tractor, and hydraulic support cylinders above the front axle.
Source: Hemos ORCA 2026 catalogue (original DE from the manufacturer)
Large and stable working reach
Thanks to boom dimensions that make maximum use of the permissible transport dimensions, the ORCA offers a large working reach. In the transport position the boom can be fully swung back. Thanks to the wide slewing range, working on the left-hand side of the direction of travel is also possible. For additional stability, the ORCA is available as an option with a support wheel with hydraulic pressure adjustment.
Source: Hemos ORCA 2026 catalogue (original DE from the manufacturer)
Pump unit
The pump unit, running at 1,000 rpm, supplies the ORCA functions and the implement with the required hydraulic capacity. The unit has its own 200-litre oil tank, a hydraulic oil cooler with automatic reversing cycle, a gearbox, and several high-pressure and gear pumps. As an option, the pump unit is available with a K80 ball hitch or in the front-mounted version.
Source: Hemos ORCA 2026 catalogue (original DE from the manufacturer)
Operation
The ORCA has its own hydraulic system and CAN-Bus control. The pump unit, driven from the PTO, supplies the hydraulic capacity required for the boom and implement. All functions are operated from the cab using the Danfoss joystick and IQAN touch screen. Machine data and faults are displayed, and various settings can be easily adjusted.
Source: Hemos ORCA 2026 catalogue (original DE from the manufacturer)
Drive-on chassis
The ORCA is built as a drive-on chassis. When connecting and disconnecting, the complete unit rests on the ground. The tractor then drives onto the chassis, lifts it and locks it. As a result, the ORCA can be connected and disconnected as a complete working unit in a short time.
Adapted tractor installation
The tractor is matched to the ORCA installation. Mounting points are fitted beneath the tractor and, where necessary, components are relocated to free up space for the boom.
Hydraulic support
Hydraulic cylinders mounted at the front axle lock the front axle and provide high stability when working with the ORCA.
2-section
The two-section boom consists of a first section 2.75 m long and a second section 2.65 m long. With these dimensions, the machine remains below the maximum transport height of 4 m.
3-section
The three-section boom is available with section lengths of 2.95 + 2.00 + 3.15 m (standard) or 2.65 + 2.00 + 3.15 m (with suction). The dimensions are sized to the maximum transport height.
4-section
The ORCA is available with four boom sections of 2.65 + 2.00 + 1.75 + 1.60 m. This allows a compact transport position, including with larger attachments such as a mower basket.
Suction
The boom can be fitted with a suction system to transport material directly away. The suction system is mounted above the boom and therefore does not restrict visibility.
Slewing ring
Thanks to the robust slewing ring made of chrome-molybdenum steel with a double-row ball bearing, the ORCA rotates through 225°. The special slewing motor is designed for high loads and is also used in excavators.
Slewing cylinder
As an alternative to the slewing ring, the ORCA is available with a slewing cylinder. The compact design keeps the transport width below 3 metres, without the need to relocate the tank or exhaust system on the tractor.
CAN-Bus control
Control is via a CAN-Bus with an electric Danfoss joystick and HEMOS software integrated into the IQAN display. The joystick allows precise control of the boom and attachment functions. As a result, the ORCA can be operated with one hand, while the other remains free to steer the tractor. A second joystick is available as an option.
IQAN display
The IQAN touch display shows oil temperature, working pressure and driving speed, as well as engine hours and distance travelled. The hydraulic function settings can also be adjusted. The boom follow-up function automatically moves the intermediate boom together with the folding boom. Float-position pressure is adjusted to the boom position and can be saved for different attachments.
Oil cooler with reversing function
The cooling system prevents dust, grass and dirt from building up on the cooler. The hydraulic oil cooler is fitted with a hydraulically driven reversing fan that automatically changes its direction of rotation. Thanks to this automatic reversing cycle, the cooler is regularly blown clean and cooling performance is maintained.
Front-mounted version
Optionally, the ORCA is available with the pump unit mounted at the front of the tractor. This version allows even easier hitching and provides better weight distribution. The rear of the tractor remains completely free, so a tipping trailer or other implement can be connected directly to the rear TUZ.
ORCA — specyfikacja
ORCA w polu
Mowing (with suction)
Mowing with suction of grass into a trailer
Mowing with a cutting bucket
Mowing with a cutting bucket over a ditch
Ditch desilting
Ditch desilting, discharge of spoil
Tree care
Tree care, implement on boom
Dokumentacja — ORCA
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View modelConversation with an engineer.
The most common questions we hear from farms before purchase.
We have collected the questions we most often hear from farms before purchase — and the answers from our engineers. Every answer is based on verified knowledge of the machine.
- manufacturer's materials
- dokumentacji technicznej
- questions asked by farms
Answers based on the experience of thousands of farms in Europe.
ORCA (Over Rijd Chassis Aanbouw) is a drive-over mounting chassis with a hydraulic boom for professional care of roadsides, green areas and forests. It is mounted on the tractor and dismounted in a few minutes. A mulcher, cutting bucket, bucket or milling head are interchangeable implements on its boom; the ORCA itself is not a mulcher.
The complete unit — chassis, boom, implement, pump unit and integrated counterweight — rests on the ground. The tractor drives onto the chassis, lifts it and locks it. Disconnection takes a few minutes, so the tractor remains available for other work.
Two-section 2.75 + 2.65 m; three-section 2.95 + 2.00 + 3.15 m (standard) or 2.65 + 2.00 + 3.15 m (with suction); four-section 2.65 + 2.00 + 1.75 + 1.60 m. Dimensions are selected so that the machine remains below the 4 m transport height.
The slewing ring, made of chromium-molybdenum steel with a double-row ball bearing, gives a rotation of 225°. The slewing cylinder gives 218°, but keeps the transport width below 3 m without relocating the tank and exhaust system in the tractor.
CAN-Bus control: electric Danfoss joystick and IQAN touch display with HEMOS software. Cylinder position sensors monitor the transport dimensions and protect against contact between the boom and tractor components. A second joystick is available as an option.
The ORCA is mounted on a specific tractor, so the weight of the assembly depends on the boom variant (2, 3 or 4 sections), the implement and the version of the pump unit — we provide it in the quotation for your configuration. On the tractor side, what matters is not only power but the 1,000 rpm PTO for the pump unit, the front axle load capacity reserve and stability in operation; these are provided by the front axle locking cylinders. Give us the make and model of your tractor — we will prepare the mounting specification with HEMOS and a quotation.
Robust and versatile
We will prepare an offer matched to the equipment and the needs of your farm.