Change-speed control system for utility vehicle having stepless change-speed apparatus for speed-changing engine output and transmitting the speed-changed output to traveling unit

A work vehicle having a driver's station comprising:

• a pair of steerable front wheels and a pair of rear wheels;
• a frame supported by the front and rear wheels;
• an engine supported by the frame and generating power to drive at least the rear wheels, a forward end of the engine being located in a middle region between a first line that passes through each shaft of the pair of front wheels and a second line that passes through each shaft of the pair of rear wheels, when the front and rear wheels are oriented straight forward, or closer to the second line than to the first line, wherein a crank shaft of the engine extends in a longitudinal direction of the work vehicle;
• a first and a second front posts supported by the frame and located in a front region of the driver's station, the first and second posts are generally extending vertically at a location rearwardly of front axles in a side view, wherein each of the first and second front posts includes:
• a) a connecting section connected to the frame,
• b) a lower post section connected to the connecting section and extending forwardly and upwardly from the connecting section so that an upper region of the lower post section is located forwardly of a lower region of the lower post section,
• c) a middle section connected to the lower section and extending substantially vertically from the lower section, and
• d) an upper post section connected to the middle section and extending rearwardly and upwardly from the middle section so that an upper region of the upper post section is located rearwardly of a lower region of the upper post section and wherein the lower post section of each of the first and second posts extends at an angle closer to a vertical direction than to a horizontal direction and the upper post section of each of the first and second posts extends at an angle closer to the vertical direction than to the horizontal direction the upper post section;
• and
• a first and a second rear posts supported by the frame and generally extending vertically in a rear region of the driver's station.