AS 73 4T B&S
Categories
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Mulching is a process by which grass cuttings are shredded several times into a fine mulch, which then remains on the surface as natural fertiliser. Special mulching blades with a double cutting plane and a circular mulching unit are used on ornamental lawns, while cross-blade systems or flail mowers are primarily used in high grass. -
Ornamental lawns in both private gardens and public facilities can be maintained with either mulching or collecting mowers. When mulching, the finely-shredded cuttings remain on the surface as natural fertiliser, while collection bags help the operator transport cuttings to a disposal point. Lawns are usually mowed once per week to a cutting height of 40–50 mm, from a maximum height of 15 cm. -
Flower meadows are structurally rich habitats that are extremely important for insects, wild bees, and species that depend on flowers. The key is not to mow frequently, but to cut at the right time. Before the flowering phase, the vegetation can quickly reach heights of 30–40 cm. After that, maintenance is carried out at longer intervals, usually once or twice a year. This form of extensive use requires machines that can safely cut tall, heterogeneous vegetation without putting unnecessary strain on the area. Clean cuts, controlled deposition, and an adapted driving style are essential for preserving plant populations and enabling regeneration. -
Extensively used meadows such as orchards, compensation areas, or roadside greenery are deliberately mowed only once or twice a year. The vegetation reaches heights of 60 to over 100 cm and forms dense, structurally rich stands. This form of maintenance serves to keep the area open and suppress woody plants, not to maintain the lawn. Machines with high throughput, uniform cutting performance, and controlled deposition of the cut material are required. This is the only way to efficiently manage large amounts of biomass without overloading the area or damaging the soil and vegetation. -
Without maintenance, open areas quickly become overgrown with blackberries, clematis, and young trees. In young forests, reforestation areas, or Christmas tree plantations, targeted brush clearing is necessary to secure the desired structures and reduce competition. It is crucial to use maintenance methods that intervene selectively and do not destroy large areas. Mechanical flail mowing technology makes it possible to remove woody growth and vigorous shrubs without unnecessarily damaging the soil structure and root space. This ensures that areas remain usable and ecologically stable in the long term. -
During the mowing season, professional operators often run their machines 5 days per week, 8 hours per day. AS-Motor’s machines are unbeatable in terms of quality, durability and professional work results. Additional advantages include low weight, lashing points and compact transport dimensions. -
Animal burrows, anthills, mole hills and water channels cause uneven terrain. Several AS-Motor machines have high ground clearance, all-wheel drive and limited slip differential, along with appropriately studded field tyres, for uneven terrain. -
AS-Motor engineers machines with high ground clearance, steep ramp angles, low overall weight, optimal weight distribution and a low centre of gravity to perform on slopes. -
All-wheel drive not only ensures performance on inclines over 30 degrees, but also a high level of safety for travel downhill. All-wheel drive delivers propulsion in wet conditions and on uneven terrain – even if the wheels of one axle no longer have traction. -
Remote controlled devices make the mowing of extreme slopes possible. This technology also allows the operator to mow at a safe distance from dust, wasps, ticks and other hazards. -
The AS 50’s high work rate delivers efficient weed removal on large and uneven surfaces such as a car parks, commercial areas and paths. A collection bag eliminates the need for sweeping and surface cleaning. -
Cobblestones and uneven paved areas can be treated for weeds, without the use of chemicals, using mechanical methods. The agile AS 30 is designed for work close to edges, water inlet channels, manholes and on traffic islands with posts and signs. -
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- Ecological mowing and extensive land management focus on reduced, targeted interventions instead of blanket mowing. Cutting heights, timing, and maintenance intervals are based on vegetation development and site conditions, not on maximum area coverage. Sub-areas are mowed on a rotating basis, while others are deliberately left untouched. This creates varying growth heights, refuges, and stable structures on extensive meadows, compensation areas, municipal green spaces, and in landscape management. Technology is used for control, not intensification.
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The only meadow mower with two blade speeds
The Allmäher for professional use in challenging conditions. Equipped with a Briggs & Stratton Series 3 INTEK engine with an oil and fuel pump, the AS 73 4T B&S masters inclines up to 35 degrees without running the risk of engine damage. A separate engine and blade shaft protect the engine in case of unseen obstacles and propulsion occurs via a 5-speed manual transmission with reverse gear (2.4 km/h) that covers a speed range from 1.6–5.1 km/h. Work rates reaching 3,700 m² per hour are possible due to a powerful engine with up to 13.0 hp, traction drive and a 73 cm cutting width. The AS 73 4T B&S effortlessly cuts grass up to 150 cm high. Variable blade speed offers two options depending on the conditions: the fast blade speed achieves an even finer mulching result, while the slower blade speed’s increased torque is recommended for dense and high growth such as areas that are seldom mowed. The AS 73 4T B&S is thus suitable for virtually every application.
Operation is simple, convenient and safe
The AS 73 4T B&S works with operating levers that activate the parking brake, the traction drive, the limited slip differential and the blade clutch. Absolute safety for slope mowing is achieved by an automatic parking brake and limited slip differential which remains permanently locked while the machine is in drive. When the drive lever is released, the parking brake automatically engages and the AS 73 4T B&S stops, whether on a slope or level ground. For convenient operation the guide bar is equipped with a V-handlebar which can be adjusted laterally and for height without tools. Cutting height can be adjusted from 50–100 mm while low-pressure tyres with field studs ensure optimal propulsion on both slopes and level ground.
Impressive cutting results thanks to a cross-blade system
The cross-blade system consists of a main blade and an overlying wing blade, providing four cutting edges to tackle grass and undergrowth. A closed mowing deck means the cut grass remains inside for longer, and is cut many times. Combined with a high blade speed, the AS 73 4T B&S offers excellent cutting results in low to medium-high grass.
Product advantages
Extra fuel and oil pump with oil pressure switch optimize performance on slopes.
The AS cross-blade system cuts and shreds grass simultaneously.
The AS 73 offers two blade speeds for optimal performance in any kind of growth.
When the drive lever is released the machine stops automatically, whether on a slope or level ground.
Permanently locked limited slip differential opens by pressing the differential lock lever.
Separate engine and blade shaft protects engine.
Operation of parking brake, blade engagement, limited slip differential, drive function, speed adaptation, all with just three levers.
Inflatable tyres with field studs for excellent traction on slopes.
Product details

Height adjustment
Central, variable height adjustment from 50–100 mm.

Manual transmission
5-speed manual transmission with limited slip differential and reverse gear provide optimal propulsion, even on a wet grass.

Closed mower deck with rear discharge
Grass and growth are finely cut and mulched in the closed mowing deck with rear discharge. This system also enables work close to edges.

Adjustable operating bar
Guide bar can be adjusted laterally and in height to adapt to the size of each operator.
Technical Data
Accessories

Operating hour meter
Documentation of work hours.

Twin tyres (Sherpa)
One pair (2x2) of rear twin tyres with extreme tread pattern for highest traction.

Electric start
Electric start provides easy and convenient starting of the machine.


















