Empty runs cannot always be avoided with semitrailer dump trucks in the construction industry, which is why a low empty weight is crucial in addition to a high payload. With only 5.5 tons in the basic version, the Fliegl three-axle StoneMaster with steel body Light Basic is a real lightweight. Baustoffhandel Dresden Mitte recently added two of these dump trailers to its fleet. Fleet manager Heiko Höntsch reports: "We exclusively transport bulk materials such as sand, gravel and earth. A robust steel body was important to us, but of course the vehicle still had to be lightweight."
Lightweight dump trailers with high payloads
The side panels of the payload-optimized 24.5 m3 round body are made of 4 millimeter thick wear-resistant steel; the floor is 4 millimeters thick in the front area and 5 millimeters thick in the higher-load dumping zone. Thanks to the conical shape- the trough is 80 millimeters wider at the rear than at the front - no cargo can get stuck. This is also ensured by the absolutely smooth surface without stops in the rear area. Thanks to the double-hook locking system and two additional clamping screws with toggle locks, the curved membrane flap is almost completely tight, even without an additional seal, and moist bulk material remains in the trough. The double-jointed hinge offers a very large opening angle, which facilitates tipping.
The Greenline version is also particularly efficient: at just 1.45 meters high, the body is lower than the cab, which ensures low air resistance, as do the lightweight aluminum rims and the lightweight frame with patented curved front end.
All supply connections as well as shovel and broom are easily accessible at the front of the vehicle. Until the next use, the hydraulic hose is parked in its holder and does not lie on the ground - this keeps the coupling clean. When loading from the side with the wheel loader, bulk material always goes astray. Thanks to the integrated and stone-repellent mudguards, it immediately falls to the ground and is not transported onto the road.
Only available for a few months, the swiveling stand-up platform S.T.E.P.. including fold-out ladder has already established itself with customers. Manually opening and closing a roll-up tarpaulin is a nuisance, and climbing up with a ladder can be dangerous. That's why fleet manager Höntsch wanted the standing platform on the new trailers as well; some existing vehicles are already equipped with it. Unlike a ladder, the platform cannot slip away; it can also be folded out without much effort. The steps are covered with non-slip checker plate, which ensures safety even in wet conditions. Thanks to galvanization, it is optimally protected against rust and ensures greater safety and comfort for the life of the trailer. In addition to the standing platform, Heiko Höntsch also opted for the electric flip-top sliding roof. It convinces with clever details: the guide rail is 1000 millimeters longer than in similar tarpaulins, which ensures more stability; in addition, there is only one steel cable or guide roller for operation - this prevents the tarpaulin from running crooked and getting caught. The canopy can be easily opened and closed by radio remote control.
The SAF disc brake axles in the off-road version are laser-measured and optimally adjusted, which reduces rolling resistance and contributes to low fuel consumption. On the three-axle trailer, the first axle can also be raised, which shifts 2.8 tons of the trailer's weight onto the fifth wheel when it is tipped, thus providing more stability. For moving off with a load, as much as 6.7 tons press on the drive axle - resulting in more traction on loose ground. From a speed of 25 km/h, the axle automatically lowers again.
The two new trailers will cover around 120,000 kilometers per year, mainly in Saxony. Fliegl offers a 10-year warranty against rust-through of the frame. The same applies to the arms of the air suspension mounts, which are located at the lowest point and are permanently exposed to dirt and moisture. Fliegl is therefore the only manufacturer to galvanize the air spring arms and also offers a 10-year anti-rust warranty for them.
The most important at a glance:
- Three-axle rear dump semi-trailer StoneMaster with steel body Light Basic, type DHKS 390 StoneMaster light
- Unladen weight: 5.5 t in the basic version
- Payload technical/permitted: 33,500 kilograms / 29,500 kilograms
- 24.5 cubic meters loading volume
- Conical, aerodynamic round body, only 1.45 meters high
- Swiveling standing platform S.T.E.P. with folding ladder; electric flip-top sliding roof with radio remote control
- Membrane tailgate with double-joint hinge
- 10-year warranty against rust-through of the frame; also for air suspension mounts thanks to hot-dip galvanizing