Small mistakes can lead to big mistakes. No, a repaired Dongfeng Tianlong dangerous goods tractor has a serious secondary fault due to the carelessness and randomness of the repairman, resulting in the scrapping of the input end of the intermediate bridge transition box of the transmission auxiliary box.
Normally, the lock nut of the input flange of the middle axle of the vehicle should be the type of flower basket nut pre tightening and cotter pin locking. However, according to the photos, a pre tightened nut with punching and mortise locking is used, and the locking end is not locked with punching and mortise, resulting in looseness during driving. Because the transmission shaft telescopic fork itself has certain scalability, the spline and thread of the input shaft of the intermediate axle transition box are damaged before the rear end of the transmission shaft falls off. Before that, the transmission shaft vibrated greatly due to the loosening of the nut, which led to the major failure of the loose frame of the transmission auxiliary box.
The repairman did not use the nut as required during the last maintenance of the inter axle differential, resulting in this serious secondary fault. The flower basket nut was supposed to be pre tightened through the cotter pin, but the pre tightened punching and mortise nut was used. However, there was no punching and mortise position on the input shaft of the transition box, so the punching and mortise was abandoned and tightened. The driver does not pay attention to the abnormal vibration and noise of vehicle transmission parts during driving. Combined with the above two reasons, this serious secondary fault caused huge economic losses.
Although the cause of the fault is in the repair shop, the driver also has unshirkable responsibility. It should have been a fault without loss or such a large loss, but it has become a fault with large loss due to the negligence of both parties. In vehicle maintenance, the repair shop shall pay attention to the condition of the vehicle and shall not arbitrarily find nuts to replace them. During daily driving, the driver shall find the sudden abnormal vibration or noise of the vehicle in time to reduce the economic loss caused by vehicle failure as much as possible.
Car repair is a meticulous job. Nuts must be used as required. It is irresponsible to replace them at will. At the same time, it also caused great trouble and loss to the owner and himself. Repair according to the standard is the king way to ensure the maintenance quality. The driver should also pay attention to inspection during daily driving and find the abnormal phenomena of the vehicle in time. Only with the joint efforts of both parties can the vehicle operate better and reduce unnecessary faults.
Dongfeng Tianlong sailing version is equipped with Volvo gearbox during the year
Routine maintenance of transmission shaft