AS 990 Tahr RC

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AS 990 Tahr RC: The Revolution in Steep Slope Mowing

Mowing Steep Slopes Just Got Easier – And Smarter

Professionals in landscaping, municipal maintenance, and environmental services know the challenge: mowing dense vegetation on extreme slopes is physically demanding, time-consuming, and dangerous. Traditional brushcutters and ride-on mowers quickly reach their limits. Turning after each pass reduces efficiency. Operator fatigue, mechanical strain, and safety concerns are constant factors.

That’s where the AS 990 Tahr RC steps in.

Engineered for maximum output and total control, this remote-controlled high grass mower with hydrostatic crawler tracks delivers high-performance cutting on slopes up to 56° (119%). Thanks to its open rotary mower deck and bi-directional cutting system, there’s no need to turn after each pass.

More Coverage. Less Turning. Maximum Efficiency.

The AS 990 Tahr RC was built with a clear purpose: maximise area output while reducing strain.

The bi-directional rotary deck, open on both sides, provides the same high-quality cut forward or reverse. No turning required after each row. Clippings are evenly distributed, promoting faster decomposition and protecting the soil.

  • No turning at row ends = time saved

  • Clean results even in grass over 1.5 m tall

  • Symmetrical blade system: 2 pendulum blades + solid blade bar

  • Cutting height adjustable via remote: 50–140 mm, 5 steps

The result: efficient mowing, consistent mulch distribution, and a visibly clean finish — even on semi-formal green areas.

Built the AS-Motor Way: Simple. Robust. Reliable.

Every detail of the AS 990 Tahr RC follows AS-Motor’s design philosophy: simple engineering, durable components, and maximum serviceability.

  • Tubular steel frame with double 4-edge design

  • Industrial-grade hydrostatic track drive

  • Folding engine hood for full access

  • Open machine layout for fast maintenance

  • Track tension indicator integrated into the chassis

No over engineered electronics. No plastic gimmicks. Just a professional-grade machine, precision-built for real-world applications.

Watch the Tahr RC in action in our performance video. Explore its innovative features in the feature spotlight video.

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Exceptional Performance on Every Slope

With a slope rating of up to 56°, the Tahr RC easily outperforms conventional ride-on mowers. The crawler tracks provide strong traction, stability, and low ground pressure of just 0.13 kg/cm², ideal for embankments, dykes, or water edges.

Cutting dense, tall vegetation becomes a one-person job — fast, effective, and safe.

Easy to Maintain. Easy to Transport.

Service access is quick and intuitive. The engine hood folds open, and the simple layout allows access to all key components. Long maintenance intervals reduce downtime:

  • Engine oil every 80 hrs

  • Hydrostatic oil: up to 400 hrs

  • V-belts & blade system: easily accessible

At 482 kg and 152 × 131 cm footprint, the Tahr RC fits onto standard trailers and is easy to move between job sites.

The Making of the Tahr – Precision Built in Germany

Behind every AS-Motor product lies a development story rooted in practical needs. The Tahr RC was created in response to a clear challenge: increase productivity and safety on the steepest slopes. Developed and manufactured in Bühlertann, Germany, the Tahr RC brings together decades of field experience, mechanical insight, and customer feedback. From its early sketches to its first successful prototype test, the Tahr has been designed for the unique challenges professionals face daily. See how it came to life in our exclusive making-of video.

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Operational Safety – Remote-Controlled Comfort

Stay away from flying debris, heat, steep terrain, or thorns — while keeping full control.

  • 300 m remote range with real-time status indicators

  • Electromagnetic blade clutch

  • Triple ejection protection (movable flaps + double curtain)

  • Low noise exposure for the operator

  • Comfortable, intuitive joystick control

Remote mowing enhances both operator safety and productivity — especially on difficult terrain.

Europe-Wide Support – Trusted Dealer Network

AS-Motor stands behind the Tahr RC with comprehensive support throughout Europe. Our well-established dealer network ensures professional service, fast spare parts availability, and expert guidance whenever it’s needed. With a two-year commercial warranty upon product registration and access to long-term parts support, your investment is protected and backed by decades of trust in the field.

Product details

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Intuitive remote control

Reduced to the essentials and ultra-precise. With LED display of cutting heights, angles and status.

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track tension indicator

See at a glance whether the belts are correctly tensioned. If necessary, simply retighten with a ratchet.

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Cross blade system

Two pendulum blades cut the vegetation and an overlying blade bar recuts and clears the mowing deck. With stainless steel mulching baffle.

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Delta crawler chassis

The asymmetrical crawler chassis ensures maximum wrap around the sprockets. Important to prevent the tracks from jumping off.

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triple ejection projection

Movable flaps and a double curtain protect the surroundings from thrown objects.

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Folding cover

The engine cover can be opened in seconds and brought into a vertical position for easy access to all units.

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Direct service points

Tool-free, quick check of the oil level and air filter.

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Lashing and lifting points

Solid lashing points and a central lifting point for safe loading, transport and servicing

Warranty

At AS-Motor, we understand that professional users, municipalities, and property owners need more than just high-performance mowing technology – they need confidence in their investment. That’s why we go beyond industry norms to offer a warranty system that sets new standards in the landscaping sector.

Technical Data

cutting width 90 cm
cutting height 50 - 140 mm
engine manufacturer B&S
engine type Professional Series 8
4-Stroke engine, single-cylinder / twin-cylinder /
displacement 724 cm³
Single knife / cross knife / Y-flail / /
work rate max. 20,1/27,0 kW (hp)
rated power 16,5/22,4 kW (hp)
nominal speed 3600 rpm
traction drive, hydrostat variable
speed max. 5 km/h
automatic parking brake
side discharge / rear discharge /
ill quantity - fuel tank 14 l
closed mower deck
Dimension L/W/H 152x131x72-80 cm
weight 482 kg
Changes in technology, equipment and price are reserved. Of information or illustrations no claims can be derived.

Accessories

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Bright LED headlights

Four optional LED headlights increase the visibility of the machine. Protected installation under the bonnet.