Capital Equipment News September 2020

COVER STORY

The truck and trailer combination are approved as a set.

Scania PBS in detail Basset explains that the PBS combination is an adaptation of the baseline vehicle, and employs one additional axle per trailer. In this instance, the added axle allows the Scania PBS vehicles to have a gross combination mass of 120 t without exceeding legal axle loads. “The trucks have been specified as PBS combinations, calling for an adaptation of the baseline vehicle, the Scania R 560 model in this instance, employing one additional axle per trailer to handle the 120-t gross combination mass without exceeding legal axle loads. The overall length of the PBS combination is 22,25 m,” he says, adding that the PBS combination thus exceeds the permissible maximum combination mass limit of 56 000 kg and the maximum length limit of 22 m. According to Basset, the Scania R 560 model was chosen specifically for its massive power that allows it to pull the abnormal loads. The R 560 is powered by a 16- ℓ V8 Scania engine delivering 560 hp, allowing the truck to discharge more than enough power for the task at hand. The trucks have been specified with hub reduction axles to be able to carry the abnormal loads, says Basset. In an axle with hub reduction, the gear reduction takes place in two steps. This means that the load is split up and there is little load on the driveshafts and the final drive. In essence, a hub reduction axle is additional gear reduction at each wheel hub of an axle. A conventional axle directly spines to a wheel hub, and the wheel hub and the axle have the same rotational speed (rpm). In a hub reduction axle, on the other

The PBS combination is an adaptation of the baseline vehicle, and employs one additional axle per trailer.

“The trucks have been specified as PBS combinations, calling for an adaptation of the baseline vehicle, the Scania R 560 model in this instance, employing one additional axle per trailer to handle the 120-tonne gross combination mass without exceeding legal axle loads. The overall length of the PBS combination is 22,25 m.”

Johnny-Ray Basset, key accounts manager at Scania South Africa

TALKING POINT

payloads. The design considers things like acceleration, braking, roll stability, tail swing and cornering. The truck and trailer combination are approved as a set. Some of the key benefits of the PBS include increased gross combination mass; increased cubic capacity; improved productivity and freight efficiency; innovative and optimised vehicle designs for specific applications; more flexible combination and vehicle design rules; improved safety; and more sustainable transportation task.

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CAPITAL EQUIPMENT NEWS SEPTEMBER 2020