AS 1040 YAK 4WD
AS-Motor’s new robust ride-on flail mower is engineered for uneven, rough and steep terrain. The AS 1040 Yak 4WD shreds grass up to 1.5 metres tall as well as brush and young saplings. With high work rates and even more safety, the flail mower is an ideal tool for professional users such as commercial landscapers and municipal operators.
The AS 1040 Yak 4WD is powered by a Briggs & Stratton 2 cylinder Vanguard V-Twin engine with up to 23 hp (17.2 kW) and 627 ccm displacement. The engine is horizontally placed and thus transfers the force directly to the flail shaft through a V-belt, while a cyclone air filter delivers fresh air supply. The engine’s oil and fuel pump guarantees performance on slopes.
- Flail over rotary?: Stable and robust asymmetrically arranged surfing flail mower unit.
- Uniform grass placement: Perfect mowing results over the entire working width.
- Made for professionals: Flail rotor drive and diminished need for path overlap guarantee high work rates.
- Robust and durable: Stable, square-tube frame with weight-optimized design, low-maintenance hydrostatic transmission and optimal cooling.
- Extremely suitable for slopes: Low centre of gravity and 4WD guarantee safety on slopes.
- Stable lateral position: Balanced weight distribution – 45% on the front axle and 55% on the rear – ensures outstanding traction and safe work on every terrain.
- Safety first: Maximum operator safety thanks to stable folding bar, integrated safety switch in the driver seat, and emergency stop foot pedal.
Features and Benefits
Flail over rotary?
Stable and robust asymmetrically arranged surfing flail mower unit. The mower deck and the flails themselves give way to uneven ground and foreign objects.
Uniform grass placement
Perfect mowing results over the entire working width.

Made for professionals
Flail rotor drive and diminished need for path overlap guarantee high work rates.
Robust and durable
Stable, square-tube frame with weight-optimized design, low-maintenance hydrostatic transmission and optimal cooling.

Extremely suitable for slopes
Low centre of gravity and 4WD guarantee safety on slopes.
Stable lateral position
Balanced weight distribution – 45% on the front axle and 55% on the rear – ensures outstanding traction and safe work on every terrain.

Safety first
Maximum operator safety thanks to stable folding bar, integrated safety switch in the driver seat, and emergency stop foot pedal. Lashing points on the device enable safer transport.
Easy maintenance
Flails and drive belt are easily replaced via appropriate service cut-outs and openings. Fast access to all maintenance points.

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 | cm |
| engine manufacturer | B&S |
| engine type | Vanguard V-Twin 3864 |
| displacement | cm³ |
| work rate max. | kW (hp) |
| rated power | kW (hp) |
| nominal speed | rpm |
| speed max. | km/h |
| cutting height | mm |
| ill quantity – fuel tank | l |
| Dimension L/W/H | cm |
| weight | kg |
Why buy from us?
At HGM, we're as passionate about customer service as we are about the machines we sell. We go out of our way to help you get the best value and the most out of your purchases. That's why we offer a better, more personal service than any other dealer, both online and in-store.
- We never sell a machine in a box - whether you choose to have your machine delivered, or to collect from our showroom, every machine we sell comes fully assembled, fueled and oiled/fully charged, and ready for you to take home and use straight away.
- We hand-deliver to your door - if you find you're having trouble making your way to our showroom, we can deliver your machine to your door, and our friendly driver will even demonstrate the machine for you if you'd like help getting started with it
- We're here for you even after the purchase - we aren't content to sell you a machine and then walk away. Our phone lines are open 5 days a week for any support or queries about your machine, and if there's an issue with your machine that needs repair, we can take it into our workshop.
- We'll prioritise you if anything goes wrong - in the rare case that something does go wrong, you'll benefit from top-priority warranty support for machines purchased from us directly.
It's all part of our Shop2Shed service - that's the HGM difference!










