POWER TRANSMISSION DEVICE FOR WORKING VEHICLE

摘要

PURPOSE:To restrain following rotation in the power transmission device of a working vehicle provided with a speed change mechanism due to hydraulic clutches L.R.H, because at a very cold time, viscosity of residual oil on the friction plate of a hydraulic clutch is raised and possibility of generation of following rotation is increased. CONSTITUTION:The detected signal of a working oil temperature detecting sensor C is transmitted to a proportional electromagnetic pressure reducing valve 9, and pressure of working oil supplied to a following rotation preventing brake B is raised.