Case Study: One-Stop Maintenance and Repair Services for Heavy-Duty Truck Tires and Chassis
A large-scale trunk transportation fleet in Guangdong, with 50 6 × 4 heavy trucks, has been traveling between Guangdong-Hunan-Guizhou inter-provincial transportation lines for a long time. The operation scene covers expressways, mountain national roads and complex road conditions in urban-rural fringe. The team had previously faced three core problems: first, the tire wear was seriously uneven, the average life span of the guide wheel was less than 70000 kilometers, the driving wheel frequently suffered from eccentric wear, bulge and tire burst, and the monthly outage caused by tire failure was as high as 20 units, which seriously affected the transportation time limit; Second, the maintenance management is chaotic, vehicles are scattered in many maintenance points for tire replacement and maintenance, and the quality of spare parts is uneven, some auxiliary factory tires even cracked within 3 months of use. Third, the cost remains high, the annual tire purchase and maintenance cost of the fleet exceeds 800000 yuan, and the loss of order delay caused by the outage is incalculable. The person in charge of the fleet said, "The tire problem has become the biggest bottleneck restricting the efficiency of the fleet operation. We urgently need a standardized and landing solution".
[2. problem diagnosis: in-depth analysis of the root causes of tire failure]After receiving the customer's demand, the technical team of Guangheng maintenance entered the fleet at the first time, conducted a comprehensive investigation and data statistics on the tire conditions of 50 vehicles, and finally located four core problems:
, 1. Wheel position and tire model match improperly. The fleet had not selected tires according to the force characteristics of different wheel positions before, the guide wheel, driving wheel, and trailer tire are mixed with general models, which causes the guide wheel to experience eccentric wear due to frequent steering at high speed, the driving wheel has tread cracking due to high torque output, and the trailer tire has shoulder wear due to long-term lateral force. 2. Four-wheel alignment and dynamic balance calibration are missing. Previously, the team only simply inflated when changing tires, and never carried out professional four-wheel alignment and dynamic balance calibration. As a result, the toe and inclination deviation of some vehicles exceeded the standard value, and the tires were in abnormal wear state for a long time. At the same time, the problems of wheel hub deformation and uneven tire weight also aggravated the abnormal tire wear. 3. The tire daily maintenance process is not standardized. The driver lacks professional tire maintenance knowledge. The daily inspection only pays attention to the tire pressure, fails to clean the tread gravel in time, and checks the valve seal. Some vehicles have been in a state of high or low tire pressure for a long time. Insufficient tire pressure leads to increased sidewall deformation, and high tire pressure leads to rapid wear of the tread center, which greatly shortens the service life of the tire. 4. The spare parts supply chain is not guaranteed. Previously, most of the tires purchased by the fleet were non-genuine tires from third-party channels. Some tires had retread tires and cross-goods tires. Not only did the wear resistance not meet the standard, but the carcass strength could not withstand the heavy load demand of heavy trucks, resulting in frequent bulging and puncture problems.
In view of the diagnosed problems, Guangheng Maintenance has tailored a full life cycle solution of "tire selection-professional replacement-regular calibration-daily maintenance-cost control" for customers, forming a standardized service process. 1. Wheel position exclusive tire selection scheme According to the operation scene of the fleet, we have matched the exclusive Chaoyang commercial vehicle tires for different wheel positions: the guide wheel uses vacuum tires with low rolling resistance and wear resistance formula, and optimizes the tread pattern design to reduce the risk of eccentric wear during high-speed driving, while reducing rolling resistance and saving fuel consumption. The driving wheel uses engineering special tires with reinforced carcass structure to thicken the sidewall and tread, improve impact resistance and puncture resistance, and adapt to heavy road conditions in mountainous areas; trailer tires adopt wear-resistant and silent models, optimize shoulder design, reduce lateral wear, and extend service life. At the same time, we have established a tire file for each car, recording tire model, installation date, mileage and other information to achieve traceability of the whole process. 2. Standardized tire replacement and calibration service. Guangheng maintenance adopts the original standard tire replacement process. Before replacement, the wheel hub is cleaned and detected to check whether there is deformation and crack. When replacing, use special tools to install the tire to avoid damaging the tire mouth. After replacement, professional dynamic balance calibration must be carried out, the imbalance point of the tire shall be detected through the equipment, and the counterweight shall be accurately added to ensure that the tire will not shake at high speed; at the same time, four-wheel alignment is carried out for each car, and parameters such as toe, camber angle, and kingpin caster are calibrated to ensure that the contact angle between the tire and the ground meets the standard, and the problem of eccentric wear is solved from the root. 3. Regular tire maintenance and troubleshooting. We have formulated monthly, quarterly and annual three-level maintenance plans for the fleet: monthly maintenance focuses on checking tire pressure, cleaning up foreign bodies on tread and checking valve sealing. Quarterly maintenance includes tire rotation and dynamic balance re-inspection, adjusting wheel position according to tire wear and balancing wear speed. For annual maintenance, tire depth inspection is carried out to check whether there are hidden defects and bulges in the carcass, timely replacement of tires with safety risks. At the same time, we provide professional tire maintenance training for fleet drivers, explain the daily inspection points, tire pressure standards, emergency treatment methods, and improve the driver's tire management ability. 4. Genuine supply chain and cost control
Guangheng Maintenance provides customers with original genuine tire supply services, directly connects with brand manufacturers, eliminates refurbishment and cross-shipment tires, and provides exclusive discounts according to the procurement scale of the fleet to reduce procurement costs. We have also established a tire cost analysis system for our customers, regularly counting the tire use cost, wear rate and failure rate of each vehicle, analyzing the use effect of different types of tires, optimizing the follow-up procurement plan, and helping the fleet to achieve fine cost control.
This service is carried out in an orderly manner in three stages. The whole process is open and transparent. Customers can follow up the progress in real time:
the first stage: centralized maintenance. We have opened an exclusive green channel for the fleet, arranged vehicles to enter the factory in batches, and completed tire replacement, dynamic balance and four-wheel positioning calibration of all vehicles on the premise of not affecting normal operation. The maintenance process of each vehicle is carried out by exclusive technicians, filling in detailed maintenance records to ensure traceability of service quality.
second stage: regular maintenance. According to the maintenance plan, technicians will be arranged to inspect and maintain the tires for the fleet vehicles every month, and problems such as abnormal tire pressure and tread foreign matter will be dealt with on site, and tires with abnormal wear will be marked with key points, and reinspection or replacement will be arranged in time.
Phase III: Training and Optimization. Organize fleet drivers to carry out tire maintenance training, and let drivers master daily inspection points and emergency treatment methods through theoretical explanation and on-site practical operation. At the same time, tire use analysis reports are submitted to customers every quarter to optimize the subsequent tire selection and maintenance plan.
After 6 months of full life cycle maintenance service, the tire management of the customer fleet has been significantly improved:
1. The service life of tires has been greatly improved: the average service life of guide wheels has been increased from 70000 kilometers to 120000 kilometers, the average service life of driving wheels has been increased from 60000 kilometers to 100000 kilometers, and the average service life of trailer tires has been increased from 80000 kilometers to 150000 kilometers, the overall tire service life is improved by more than 60%.
2. The number of failures and outages has been greatly reduced: the monthly average number of tire failures and outages has been reduced from 20 to less than 3, the incidence of safety accidents such as tire burst and bulge has been reduced by 90%, and the transportation time has been effectively guaranteed.
3. Maintenance costs have been significantly reduced: the annual tire purchase and maintenance costs of the fleet have been reduced from 800000 yuan to less than 500000 yuan, a decrease of more than 37%. At the same time, the loss of order delays caused by outages has been reduced, indirectly saving a lot of operating costs for customers.
4. Overall improvement of management efficiency: Through the establishment of tire files and cost analysis system, the fleet has realized the fine management of tires, without the need to disperse and connect with multiple suppliers and maintenance points, and the management efficiency has been greatly improved.
Guangheng Maintenance has been deeply engaged in the commercial vehicle maintenance industry for many years, focusing on the whole life cycle service of heavy trucks and trucks. It has a professional technical team, advanced testing equipment, stable genuine supply chain and standardized service process. We always adhere to the "customer-centric" service concept, and customize exclusive solutions for different customers' operating scenarios. It not only solves customers' current tire failure problems, but also helps customers establish a long-term tire management system to achieve efficiency improvement and cost control. Dual goals. Whether it is a large fleet or an individual driver, Guangheng Maintenance can provide professional, efficient and transparent tire maintenance services and become a reliable partner on the road of commercial vehicle operation.