How To Adjust The Truck Maintenance Cycle For Short Distance High-frequency Operations

Many overseas engineering, mining, and suburban short distance transportation fleets have vehicles that repeatedly start and stop, frequently load and unload, low-speed heavy loads, and continuous bumps every day, with much higher working conditions than long-distance mainline vehicles. Many fleets still maintain their vehicles according to standard long-distance mileage, resulting in hidden wear and tear accumulation, premature scrapping of vulnerable parts, and frequent minor malfunctions. For short distance high-frequency operation scenarios, it is necessary to shorten and adjust the maintenance cycle in a targeted manner, in line with actual working conditions, in order to effectively reduce the failure rate and extend the service life of trucks.
The biggest characteristics of short distance high-frequency operations are low speed, high idle speed, frequent start stop, insufficient engine combustion, faster carbon deposition rate, and higher degree of oil aging. The regular long-distance maintenance cycle is no longer applicable. It is recommended to shorten the replacement interval of engine oil, oil filter, and fuel filter appropriately to avoid the wear of precision components such as crankshaft and cylinder block caused by dirty engine oil. At the same time, there is a lot of dust and dust in the short distance, and the air filter clogs quickly. It is necessary to increase the frequency of inspections, clean or replace it in a timely manner, and prevent insufficient intake from causing a decrease in power and an increase in fuel consumption.
Frequent bumpy operations can accelerate the aging of the chassis system. Short distance construction sites and gravel roads experience strong vibrations, making it easy for chassis screws to loosen and causing faster wear and tear on rubber sleeves, bushings, and shock absorbers. It is recommended to conduct a chassis fastening inspection every two weeks for high-frequency operation vehicles, with a focus on checking the suspension, thrust rod, and axle fixing points, and promptly addressing any potential looseness hazards. Compared to long-distance buses, the frequency of chassis inspections for short distance buses needs to be doubled to avoid problems such as deviation, abnormal noise, and tire wear caused by long-term vibration.
The maintenance cycle of braking and air system also needs to be adjusted in advance. Short distance loading and unloading, repeated starting and stopping, frequent braking, faster wear of brake pads, frequent filling and exhausting of the air circuit, and higher load on the drying tank and valve body. Wet and dusty environments can easily cause water accumulation and blockage in the air circuit. It is recommended to shorten the drainage cycle of the air storage cylinder, increase the frequency of brake pad and brake clearance inspections, replace severely attenuated friction parts in advance, and avoid sudden brake failures during construction site operations.
Electrical and wiring harness maintenance cannot be ignored. Short distance construction sites have more gravel and mud, and the chassis wiring harness is subject to long-term erosion and friction, making the outer skin more prone to wear and tear. During each periodic maintenance, it is necessary to simultaneously check the wire harness sheath and plug sealing, clean up mud and dust, and prevent moisture short circuits and electrical failures.
Overall, the maintenance of short distance high-frequency operation trucks cannot simply follow the standard mileage cycle. It is necessary to shorten the maintenance interval and increase the inspection frequency according to the harsh working conditions of low-speed heavy load, dusty bumps, and frequent start stop, so as to identify small problems in advance and maintain vulnerable parts in advance. Scientifically adjusting the maintenance rhythm can significantly reduce the failure rate of short distance vehicles, reduce downtime for maintenance, and help overseas fleets achieve stable and efficient operations, long-term cost reduction and efficiency improvement.