Why can't you increase the throttle just after the rough terrain forklift starts?

After the diesel engine of the rough terrain forklift starts, it should run at low speed for 3 to 5 minutes. The purposes are as follows: Preheating: Allow all parts of the machine to heat up slowly and evenly to normal operating temperature, reduce wear, and avoid mechanical scoring. Ensure lubrication: When the diesel engine of the rough terrain forklift has just started, the lubricating oil viscosity is relatively high, and lubrication at various points is poor; after preheating, the lubricating oil will gradually reach all lubrication points, avoiding dry friction damage to mating surfaces. After the diesel engine starts, the machine temperature is relatively low, and the diesel fuel is not completely burned. At this time, if the throttle is increased and the fuel supply is increased, the excess unburned diesel fuel will form carbon deposits, aggravating diesel engine emissions; in addition, the excess diesel fuel may also flow along the cylinder wall into the crankcase, affecting the lubrication of the cylinder wall, diluting the engine oil in the oil pan, reducing lubrication performance, and shortening the service life of the diesel engine. During the handling operation of the four-wheel drive rough terrain forklift, there are phenomena such as overloading, unstable swinging of loaded goods, and accidental falling of goods. Possible causes include: lifting too quickly during operation, or transferring at a speed exceeding the specified speed, and sudden braking to avoid an emergency causing the goods to fall; it may also be that the goods are not tied securely to the vehicle body as required, or the goods do not match the fork arm device of the four-wheel drive rough terrain forklift, causing the goods to fall off the fork frame. This risk can be completely eliminated or avoided as much as possible according to the following points: operate the four-wheel drive rough terrain forklift as smoothly as possible; package the goods neatly before transportation and secure them tightly with the fork frame; never brake suddenly while driving; level uneven road sections in a timely manner; at the same time, according to relevant regulations, the goods must not be overloaded. When the load on the fork frame is too heavy, the rear part of the vehicle body will tilt upward. At this time, if a person is allowed to stand at one end of the four-wheel drive rough terrain forklift and use body weight as counterbalance, then when lifting the goods, the rear part of the vehicle body will suddenly tilt upward, causing the person to fall. This type of accident may be caused by overloading of the four-wheel drive rough terrain forklift, or by the lack of protective measures at the position where the person is standing.