Which Parts Of Trucks Are More Prone To Damage During Frequent Short Distance Operations

Most overseas fleets believe that long-distance high-speed driving is the most harmful to trucks, but in fact, frequent short distance start stop operations in construction sites, factories, and mining areas result in a much higher vehicle failure rate than long-distance transportation on main roads. Short distance operations generally have the characteristics of frequent ignition and starting, engine loading before it heats up, frequent idle switching, and repeated start stop of working conditions. Many core components are in mismatched working conditions for a long time, causing chronic cumulative damage. Compared to long-distance constant speed stable working conditions, short distance vehicles have faster aging of vulnerable parts, more minor faults, and severe premature aging of the entire vehicle. The following focuses on analyzing the core components and labor damage principles that are most easily damaged during short distance operations, in order to help overseas fleets reduce costs through targeted maintenance. Firstly, the battery is the component with the fastest loss during short distance operations. Every time a truck is started, it requires a super large instantaneous current power supply. However, due to the short driving range and insufficient working time of the generator, the charging capacity cannot compensate for the power loss caused by starting, and the battery is in a long-term deficit state of insufficient income. The repeated shallow depletion and frequent start stop shocks of the battery can accelerate the vulcanization of the electrode plates, resulting in a decrease in storage capacity and weak starting, greatly shortening the battery life. This is also the core reason why the battery replacement frequency of short distance construction vehicles is much higher than that of long-distance vehicles. Secondly, the engine has severe carbon deposits and the fuel injection system has premature aging. The normal operation of the engine requires reaching the standard operating temperature. For short distance operations, it is often necessary to start the cold car and immediately drive under heavy load. The water temperature and oil temperature have not yet reached the standard, and the fuel atomization is not sufficient, resulting in low combustion efficiency. It is easy to produce a large amount of carbon deposits inside the fuel injectors, pistons, and intake ducts.Long term refrigeration operation can cause nozzle blockage, poor atomization, idle shaking, decreased power, and increased fuel consumption. The high-pressure common rail system operates at low temperatures for a long time, leading to increased wear on precision components and a significant increase in failure rates. The loss rate of the three filter system accelerates, and the oil performance deteriorates prematurely. Frequent short distance start stop cycles can cause the engine oil to alternate between hot and cold, resulting in the formation of oil sludge impurities. Under low-temperature conditions, the lubricating fluidity of the engine oil deteriorates, and mechanical dry grinding intensifies at the moment of start-up. At the same time, there is a large amount of dust in the short distance working conditions of the construction site, and the air filter frequently adsorbs impurities. The alternation of hot and cold is more likely to cause moisture and blockage, resulting in a decrease in filtration efficiency. If not maintained in a timely manner, fine sand and dust can enter the engine, further exacerbating internal wear and tear. The braking system is prone to eccentric wear and jamming faults. Frequent start stop and low-speed repeated braking during short distance operations result in frequent contact and separation of brake pads and brake drums for a long time. Friction heat cannot be dissipated in a timely manner, which can easily cause thermal fatigue of brake components. At the same time, the accumulation of impurities and dust stuck in the brake gap during low-speed braking can easily lead to poor brake return and slight drag, resulting in uneven wear of the brake pads and overheating of the wheel hub. Long term accumulation can cause a decline in braking performance. The chassis suspension and transmission components are experiencing increased fatigue. The road conditions on short distance construction sites are bumpy and complex, with vehicles frequently starting, braking, and turning. Steel plate springs, balance shaft rubber sleeves, and shock absorbers continue to withstand alternating impact loads, without a buffering process for uniform driving. Repeated starting and stopping can cause the transmission shaft and cross shaft to frequently experience instantaneous torque impact, which can easily lead to increased clearance, abnormal noise, and loose chassis, which are more common than long-distance vehicles. In response to the premature aging problem of short distance operation vehicles, overseas fleets do not need excessive maintenance, only targeted maintenance can extend the service life of components. Cold vehicles must idle and preheat before starting to load, to avoid violent operation of the refrigeration system; Regularly recharge the battery to reduce deep battery depletion; Shorten the replacement cycle of the three filters and keep the engine oil clean; Regularly clean the dust in the braking system and tighten the loose parts of the chassis. Short distance truck wear and tear is mostly due to fatigue damage caused by working conditions. Understanding the rules of component wear and proper pre maintenance can effectively reduce failure rates, reduce fleet operation and maintenance costs, and improve vehicle attendance and overall durability.