15-ton mining "four-in-one" transport vehicle operation tips: When shifting gears from the low gear to the high gear (or vice versa), do not skip gears. Additionally, avoid abruptly pressing the accelerator pedal, as this can severely damage the automatic transmission, especially the clutch and brake friction components. When descending hills, it is prohibited to change between high and low gear ranges; when ascending hills, the vehicle must downshift gradually; when going up or down hills, the transmission should remain in the low gear, and overtaking gears is strictly forbidden.