The invention discloses a micro-motion function and
hydraulic brake control system of a wheeled dozer, and belongs to the field of wheeled dozers. The micro-motion function and
hydraulic brake control system comprises an
oil tank, an oil suction filter, a
gear pump, a high-pressure filter, a prefilling valve, a micro-motion oil cylinder, a left pedal valve, a
pressure switch, a
brake valve set, a right pedal valve, a
shuttle valve set, a rear axle
brake, a front axle
brake and a
parking brake. Through the left pedal valve (micro-motion function pedal valve), a driver can effectively control tire drive force by combining the condition that the tire drive force ranges from 0 percent to 100 percent, wheel slipping is avoided, tire abrasion is reduced, and therefore
engine power can be effectively utilized,
oil consumption can be reduced, and circulating speed can be improved. According to the micro-motion function, the tire drive force is effectively controlled, meanwhile, emergency braking can be achieved through a service brake, and the reliability and running safety of a brake
system are obviously increased. Main elements of the
control system are integrated on the brake valve set,
pipe connection is simplified greatly, and
pipe arrangement is more reasonable.