How should the auxiliary tanks be filled when refueling the T-54A?

Filling the auxiliary tanks first when refueling the T-54A is a standard procedure designed to ensure that the main fuel tanks remain pressurized during the fueling process. This practice helps in avoiding issues such as fuel spillage or overflow, which could occur if the main tanks are filled before the auxiliary ones. By filling the auxiliary tanks first, it allows any air trapped in the tanks to escape as fuel enters, thus maintaining an efficient flow and preventing air locks.

Additionally, filling the auxiliary tanks first ensures that these tanks reach full capacity early in the process. Once they are filled, the refueling process can then smoothly transition to the main tanks without complications. This orderly approach enhances safety and fuel management, and it optimizes the overall effectiveness of the refueling operation.