Patent ID: 8615882

Claim:
A method of manufacture of a power assisted steering control valve; said control valve comprising a pinion shaft, an input shaft and a torsion bar; said method comprising the steps of: a. receiving into clamping fixtures of an assembly machine a pre-assembled loose assembly of said pinion shaft, said input shaft and said torsion bar; b. establishing and recording a predefined rotation clearance between a shoulder of said pinion shaft and an end of said input shaft; c. rotating said input shaft in opposing directions between rotation limiting stops provided by walls of a socket of said pinion shaft so as to establish a midpoint mid-point of rotation of said input shaft relative to said pinion shaft; d. pressing a first end of said torsion bar into said input shaft to form a locked together assembly of said input shaft and said torsion bar; and e. axially advancing said locked together assembly of said input shaft and said torsion bar into said pinion shaft so as to press a second end of said torsion bar into a locked together assembly with said pinion shaft.