Speed change control device in working vehicles

Abstract

A valve casing (55) having plural direction control valves (46H, 46L, 46A, 46B, 46C) and plural pressure sensors (47H, 47L, 47A, 47B, 47C) is mounted on an outer side surface of a vehicle body (2) which includes therein plural fluid-operated clutches (40H, 40L, 43A, 43B, 43C) for changing the vehicle running speed. The control valves are secured to the casing from one of upper and lower surfaces thereof and the pressure sensors are secured to the casing from the other of the upper and lower surfaces such that the valves and the sensors are arranged respectively in parallel in a longitudinal direction of the vehicle body. Preferably, the valve casing is composed of an outer plate member (57) to which the control valves and pressure sensors are secured, an inner plate member (58) comprising plural output ports (60H, 60L, 60A, 60B, 60C) which are connected respectively to the plural fluid-operated clutches, and a separator member (59) interposed between the plate members and having plural fluid passage bores which connect between fluid passages in the outer plate member and fluid passages in the inner plate member.

Dependencies are inferred from the claim text.