The maintenance team tightened the fixing bolts of the 0R-3190 injectors according to the standard torque, and installed shock-absorbing pads between the injectors and the engine to reduce vibration. At the same time, the loose internal components of the injectors were re-fixed and replaced the damaged components. After improvement, the failure rate of the injectors was significantly reduced. The maintenance experts suggested that for Caterpillar injectors working in high-vibration environments, shock-absorbing measures should be taken and the fixing bolts should be checked regularly to avoid component loosening caused by vibration.