A hydraulically driven traveling vehicle comprising a pair of right and left
driving
axles (driving sprockets) differentially connected to each other by a differential
mechanism, the input section of the differential mechanism having the output rotation
of traveling HST 110 (110) transmitted thereto, both driving sprockets
having mutually opposite two-flow output rotations separately transmitted thereto
from a steering HST (120), thereby effecting traveling driving and turning,
electromagnetic solenoids (61a, 61b, 62a,
62b) serving as output regulating devices for the traveling HST
and the steering HST being provided so that the manipulated variables and directions
of a speed change lever and a steering operation tool are converted into electric
signals, on the basis of which electric signals the output current values of the
electromagnetic solenoids are controlled, causing the respective output rotary
speeds of the HSTs to correspond to the output current values.
