There are provided a work vehicle and a method for controlling the work vehicle, capable of minimizing the loss of driving force in a braking device and suppressing the occurrence of overheating. The work vehicle 1 comprises a braking device (5a), (5b), a lubricant feeding section (6), and a controlling section (7). The controlling section (7) is able to execute a first control for controlling, based on a temperature of the brake disc, the amount of lubricant fed to the braking device (5a), (5b). The controlling section (7) sets the amount of supplied lubricant to a predetermined first feed amount when the braking device (5a), (5b) is in a braking state, and makes a decision in the first control, based on the temperature of the brake disc, to change the amount of supplied lubricant from the first feed amount to a second feed amount, which is smaller than the first feed amount, when the braking device (5a), (5b) is switched from the braking state to a non-braking state.