Patent ID: 7458917

Claim:
A work vehicle with a speed change device, comprising: a plurality of wheels including at least one driven wheel; an engine for driving said at least one driven wheel; the speed change device provided between said at least one driven wheel and said engine; and an automatic shifting means for operating said speed change device to a lower speed position within an automatic shifting range defined by a low speed limit position (RL) and a high speed limit position (RH) and for operating said speed change device up to a speed position said speed change device was in before an operation to the lower speed position was effected, in response to load on said engine, said automatic shifting means preventing an automatic shift to a speed position lower than the low speed limit position (RL) and to a speed position higher than the high speed limit position (RH), wherein an entirety of said automatic shifting range is changeable to a low speed side by shifting both the low speed limit position (RL) and the high speed limit position (RH) to the low speed side and is changeable to a high speed side by shifting both the low speed limit position (RL) and the high speed limit position (RH) to the high speed side.