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10 Things you should investigate while repairing jackknifed semi-truck If you’re in the process of repairing a jackknifed semi-truck, there are a few key things you’ll need to investigate. Here are 10 of the most important: 1. The cause of the jackknife. Was it a sudden stop or turn? Poorly maintained brakes? Incorrectly loaded cargo? Knowing the cause can help you prevent future jackknifes. 2. The condition of the brakes. Jackknifes are often caused by faulty brakes, so it’s important to inspect them thoroughly. 3. The condition of the tires. Worn tires can contribute to jackknifes, so check for tread wear and proper inflation. 4. The condition of the steering. Jackknifes can also be caused by poor steering, so make sure the steering system is in good working order. 5. The condition of the suspension. A poorly functioning suspension can lead to jackknifes, so inspect it carefully. 6. The condition of the cargo. Improperly loaded or secured cargo can cause jackknifes, so make sure all the cargo is properly secured. 7. The weight and balance of the truck. An imbalance in the weight or distribution of the load can cause jackknifes, so check for proper weight and balance. 8. The condition of the hitch. A faulty hitch can cause jackknifes, so make sure it is in good working order. 9. The condition of the trailer. If the trailer is not properly connected or is in poor condition, it can cause jackknifes. 10. The weather conditions. Slippery roads can make jackknifes more...