The direction of haulage may be push or pull, though pushing tends to be for a pair of ballast tractors working together, one pulling and the other pushing an exceptional load on a specialist trailer. The most common drawbar configuration for heavy vehicles is an A-frame drawbar at the front of a full trailer that connects to a tow coupling on a hauling vehicle [1] If you have been issued with protective clothing by your company for use while driving, it is your responsibility to wear it.

On light vehicles, the most common coupling is an A-frame drawbar coupled to a 1 7/8 inch or 50mm tow ball. These drawbars transmit around 10% of the gross trailer weight through the coupling.If you are driving along and notice that tread is coming away from one of your tyres (i.e. your tyre is delaminating), you must stop and change it. Different sized wheels

Overfilling your engine with oil could cause a loss of power. This is because moving engine parts could hit the oil. This can even damage the engine. Overfilling with oil can also cause excess pressure which can damage oil seals and cause leaks. Aggressive reversing can break or bend the funnel which directs the towing eye into the jaw. In this case, the drawbar height was too low and the approach speed too fast. The funnel couldn’t direct the drawbar into the jaw, instead breaking through the funnel. If you notice your headlights not working, even if it’s daytime, get them fixed before setting off. If you are driving a vehicle fitted with a turbocharger these can heat up to 600 degrees Celsius. When you stop, allow your engine to idle a short time (around a minute) to help the turbo cool. Some vehicles will have a turbo timer fitted to allow this to happen without you waiting with the vehicle. Oil When you start the engine the ignition light should go out. If it doesn’t, you have an electrical fault.The purpose of a pre-heating device is to heat the engine in cold weather. They heat the glow plugs in the cylinders. The starter should only be operated when the indicator light goes out.