Difference 10/20 series steering valve adjustments

What is the correct steering valve adjustment procedure on an older 10 series valve? According to the 4000 series manual the two LH valves are adjusted to .003 and the two right are .001. This makes no sense. The Late 4020 manual has you adjust the top left .003, top right .001, lower right .003 and lower left .001. This to me makes sense as it follows the return and pressure valves according to the diagram. To add even more confusion is my I&T Manual has another different procedure stating the early 10 series valves are adjusted .003 top Left, .001 top right, .002 lower left and .003 lower right. What gives here?? What is the correct procedure? Thanks
 

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