Regular inspection of bolts in key parts is an important part of wheel loader maintenance. It is recommended to use appropriate tools and torque, and tighten bolts in the correct order and specifications according to the wheel loader manufacturer's recommendations and regulations. At the same time, the tightening status of the bolts should be checked regularly, and loose or damaged bolts should be discovered and dealt with in a timely manner to ensure the safety of the loader. During operation, if the bolts in key parts are loose, we can clearly feel the wheel loader shaking or making abnormal noises. Long-term neglect may cause safety accidents and property losses. When the new vehicle has been running for 100 hours, we must The bolts in key parts should be checked for torque, and then the torque should be re-checked every 500 working hours.