Servo steering control valve assembly process, comprising centering inner and outer valve members, fixing outer member and tracking member and deforming outer member

摘要

The assembly process is applied to a servo steering control valve (22) with an inner valve member (40) connected to a tracking member (54) by a torsion bar (102). An outer valve member (42) is fixed to the tracking member by pressing in, producing depressions (56). Before this is done, the inner and outer valve members are moved relative to each other in order to bring about a hydraulically centered state in which equal fluid pressures are applied to the servo steering motor (31) for the clockwise or anti-clockwise operation of the valve members.