PROBLEM TO BE SOLVED: To provide a work vehicle capable of curbing a reduction in combustion efficiency of an engine when heating urea water used for exhaust purification.SOLUTION: A work vehicle comprises: a switch valve 172 which supplies cooling water heated by an engine 20 by switching supply destinations between a radiator 80 and a tank radiator 171； and a switch motor which switches states of a fan between a cooling state to take in external air from an outside of a filter body to an inside thereof and a dust removal state to blow air from the inside of the filter body to the outside thereof. When a temperature of urea water in a urea water tank 167 is lower than a first predetermined temperature, the switch valve 172 is switched to supply the cooling water to the tank radiator 171 and the switch motor is activated to switch the fan to the dust removal state.SELECTED DRAWING: Figure 12【課題】排気浄化に使用する尿素水を加熱する際にエンジンの燃焼効率が低下することを抑制できる作業車両を提供する。【解決手段】エンジン２０で加熱された冷却水を、ラジエータ８０側とタンク用ラジエータ１７１側とに切換えて供給する切換弁１７２と、ファンを、濾過体の外側から内側へ外気を吸入する冷却状態と、濾過体の内側から外側へ風を吹き出す除塵状態とに切換える切換モータを備え、尿素水タンク１６７内の尿素水の温度が所定の第１温度よりも低い場合に、切換弁１７２をタンク用ラジエータ１７１へ冷却水が供給される側に切換えると共に、切換モータを作動させて除塵状態に切換えることにより解決される。【選択図】図１２
