What basic tool should always be included in the emergency kit for a crawler tractor?

Including a fire extinguisher in the emergency kit for a crawler tractor is crucial because engines and hydraulic systems can overheat or leak, leading to potential fire hazards. In the event of a fire, having a fire extinguisher readily available can help suppress flames quickly, providing a critical window for safety and minimizing damage to both the machine and surroundings. It serves as an essential safety measure, ensuring that operators are prepared to handle emergencies that could arise from mechanical failures or operational mishaps. While tools, first aid supplies, and a shovel are indeed valuable in various scenarios, the immediate risk of fire makes the fire extinguisher a must-have for emergency preparedness when dealing with heavy machinery like a crawler tractor.