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. The fifth wheel requires regular lubrication and inspection. This should be carried out either monthly or every 10,000 km whichever comes first.

Agricultural equipment is hauled by a tractor-mounted drawbar. Specialist agricultural tools such as ploughs are attached to specialist drawbars which have functions in addition to transmitting tractive force. This was partly made redundant with Ferguson's development of the three-point linkage in his famous TE20. It is also a requirement for the manufacturer’s date code to be legible on all tyres fitted to LGV tractor units and trailers over 3.5 tonnes. It is also a requirement for the manufacturer’s date code to be legible on all tyres fitted to LGV tractor units and trailers over 3.5 tonnes. 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.Lorry and bus tyres have codes on the tyre side walls which indicate the maximum load and the speed capability. Increased risks of punctures

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 Smoke coming from your tyres is not normal in every day driving and you should stop immediately if you see this as it could be rubbing on part of the bodywork which will eventually cause it to overheat or will rub through and cause a blowout. Changing a wheel or tyreAggressive 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 see this warning light then you have a problem with your oil pressure. Continuing to drive with this light on could cause your engine to seize. If there’s not enough oil pressure the engine components won’t be lubricated. They will overheat and eventually will seize. If you notice a lump or bulge, a deep cut more than 25mm (1 inch) long, or exposed ply or cords, then the tyre is illegal to use on the road. You can see in this following video how much force a tyre on a heavy vehicle can explode with in a blowout. The fifth wheel coupling is used to connect a tractor unit to a trailer. It allows articulation between the tractor and trailer. The oil filter collects sediment from the oil. This sediment comprises tiny metal fragments from the engine. The oil filter will usually be replaced at service intervals and this reduces friction. Fuel

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Vehicle operators must have an effective system in place for drivers to report vehicle defects and have them repaired properly. Older vehicles require double-declutching to change gear. On new vehicles with synchromesh gearboxes, double-declutching increases clutch wear and wastes fuel. Protective clothing 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

Diesel expands in the heat. If your fuel tank is filled to the brim and it’s a hot day, expansion of the fuel will cause it to spill on the road which is very dangerous, especially for motorcyclists. Don’t fill your fuel tank to the brim. Drawbar trailers have a specific method to couple them with the towing vehicle (this could be a rigid lorry or a prime mover/tractor unit that has the correct coupling). The drawbar towing eye fits inside the jaws of the coupling unit and a pin drops through the eye.Consistent high speeds for long distances on motorways can cause your tyres to overheat and disintegrate. This is more likely to be the case if they are under-inflated because this creates more rolling resistance that is dissipated in the form of heat.