A semitrailer couples to a prime mover when the kingpin sits inside the fifth wheel’s locking jaws and the skid plate of the semitrailer is resting on the fifth wheel. The standard height of the skid plate is around 1250mm,…
A semitrailer couples to a prime mover when the kingpin sits inside the fifth wheel’s locking jaws and the skid plate of the semitrailer is resting on the fifth wheel. The standard height of the skid plate is around 1250mm,…
On some prime movers, the fifth wheel or turntable can be moved backwards and forwards to achieve better load balance. Overloading an axle is illegal, plus it can cause overheating and delamination of tyres, affect the brake balance and, in…
A heavy vehicle is one with a gross vehicle mass of more than 4.5 tonnes. These vehicles have restrictions for the safety of other road users. Sometimes they are allowed to do things that other road users aren’t, and sometimes…
