Overview

This document presents a detailed technical overview of various models of UNI mowers and related agricultural machinery produced by Gerhard Dücker GmbH & Co. KG. The focus is on mowing, mulching, and shredding equipment designed for different tractor power ranges and terrain conditions, including specialized models for steep slopes and large-area mowing.

1. Product Range and Applications

• PMK Uni Mower: Designed for steep slopes, intended as a front attachment for special slope carrier vehicles (e.g., Aebi, Reform). Features include suspension via pulling over the attachment frame and lateral oscillation for optimal mowing head guidance.
• UMT Series (10, 13, 15, 18): Compact universal mowers suitable for small and municipal tractors from 13 kW (18 HP) upwards. Available in working widths from 1.00 m to 1.80 m. Can be mounted as rear, front, or combined attachments. Features mechanical lateral displacement (0.45 m standard, hydraulic optional) for mowing in difficult-to-access areas.
• UMK Series (16, 18, 21): Robust mowers for tractors with 23 to 44 kW (30 to 60 HP). Working widths from 1.60 m to 2.10 m. Available as rear, front, or combined attachments with options for mechanical or hydraulic lateral displacement (up to 60 cm). Can be equipped with heavy, free-floating flails for tougher vegetation.
• UM Series (19, 23, 27, 30, 40): Larger mowers for tractors from 33 kW (45 HP) upwards, with working widths from 1.90 m to 4.00 m. Features include sturdy frame construction, large gear and bearing dimensions, and options for rear, front, or combined attachments with lateral displacement. Equipped with rollers or wheels for ground adjustment and designed for rough terrain.
• GFM 740 Large Area Mower: Designed for large-scale mowing with a working width of 7.40 m. Available in divided or closed build, with hydraulic relief control and hydraulic positioning for working and transport modes. Features lateral mulchers that move back upon obstacle contact to prevent damage.

2. Technical Features and Adjustments

• Attachment and Mounting: All mowers offer versatile three-point hydraulic system compatibility with adjustable holding points. Front, rear, and combined mounting options are available, with some models featuring rear suspension and built-in joints for smooth operation on uneven terrain.
• Lateral Displacement: Mechanical or hydraulic lateral displacement options allow mowing in inaccessible areas such as under trees, near fences, or on slopes. Displacement ranges from 0.45 m to 0.60 m depending on the model.
• Cutting Height Adjustment: Rough adjustment via scanning roller; fine adjustment via top link. Some models include ground relieving springs to reduce front attachment weight by up to 50%.
• Flail Shafts and Flails: Standard flails weigh approximately 2 kg, made of spring steel, loosely hooked and secured by screws. Centrifugal force positions flails during operation, allowing them to move backward when encountering obstacles. Optional heavy, free-floating flails are available for tougher vegetation and shrubs up to 4 cm diameter.
• Drive and Power: Most models operate at 540 rpm PTO shaft speed, with optional 1000 rpm available for some. Power requirements range from 13 kW (18 HP) for smaller models up to 140 kW (190 HP) for larger machines.
• Ground Adjustment: Rollers mounted across the entire mowing width ensure good ground contact on uneven terrain. Larger models can be equipped with wheels for level terrain.

3. Special Features and Accessories

• Basket Attachment: Available for UM 19, 23, and 27 models, attached via two pivot points and emptied hydraulically. Enables collection of mowed material in windrows or centralized piles, aiding in pathogen and parasite control in hay bales.
• Impact Rail: Optional front-mounted impact rail enhances shredding of mulch material.
• Hydraulic Features: Hydraulic drive options for some models, hydraulic lateral displacement, and hydraulic positioning for large mowers improve operational comfort and efficiency.

4. Range of Application

The mowers are suitable for a wide variety of environments including agriculture, orchards, vineyards, roadside verges, sports fields, recreation grounds, practice areas, shooting ranges, and airfields. They effectively handle all types of grass, reeds, sedges, thorny bushes, and shrubs up to 4 cm in diameter.

5. Technical Data Summary

The document includes a comprehensive table summarizing key technical parameters for each model, including working width, total and transport width, power requirements, weight, PTO shaft speed, area output (ha/h), linkage category, number of flails, front attachment availability, lateral displacement capability, basket option, and ground adjustment type.

Examples:

• UMT 10: 1.00 m working width, 13 kW power, 310 kg weight, 540 rpm PTO, 0.45 m lateral displacement (mechanical), roller ground adjustment.
• UMK 21: 2.10 m working width, 30 kW power, 650 kg weight, 540 rpm PTO, 0.60 m lateral displacement, roller ground adjustment.
• UM 40: 4.00 m working width, 90 kW power, 1600 kg weight, 1000 rpm PTO, no lateral displacement, roller ground adjustment.
• GFM 740: 7.40 m working width, 3100 kg weight, 1000 rpm PTO, roller ground adjustment, hydraulic positioning.

6. Manufacturer Information

Gerhard Dücker GmbH & Co. KG, located in Stadtlohn, Germany, specializes in technology for environmental landscape maintenance and agriculture. Contact details and website are provided for further inquiries.

Critical Notes and Recommendations

• Selection of mower model should consider tractor power, terrain type, and vegetation density.
• Hydraulic lateral displacement and front/rear mounting options enhance operational flexibility in challenging environments.
• Use of heavy, free-floating flails is recommended for areas with dense shrubs or tougher vegetation.
• Regular adjustment of cutting height and ground contact mechanisms ensures optimal mowing quality and machine longevity.
• Utilizing the basket attachment can improve pasture health by reducing parasite spread.