The difference between maintaining and repairing a fuel tank truck is clear: repairs address failures, while maintenance prevents them. Careful operation of tank trucks is essential, as eliminating safety hazards and maintaining the vehicle are crucial. Failures can lead to safety risks, so maintenance focuses on reducing part wear, preventing breakdowns, and extending the vehicle’s lifespan. In contrast, repairs restore failed or non-functional parts and assemblies, ensuring the truck regains its working condition and extends its service life.