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.040 or .080? Yes and no. That affair on the shaft with the springs between the collars and the shim washers outboard of that, if you have an illustration to look at, is set up with .040 between the collars.
Now, that I am thinking about it, unless I am missing something, the valve actually can move .040 in either direction, so at that point you really have .080 movement.
You have to keep in mind that at rest, with no force applied to the steering wheel, the springs in that collar assembly actually take up all the end play of the shaft. This centers the valve in the neutral position. Then as you turn the worm into the sector gear the springs are compressed toward one side - at least until the collars press together at .040 maximum movement. But if you turn in the opposite direction from that point, the springs push the collars apart and you come to the at rest position, then the springs compress again until the collars press together again at .040 maximum movement. So to answer your question, there is .040 movement in either direction, for a total of .080 movement. But you have to remember that if the valve spool moves a full .080, it has gone from the full flow in one direction to neutral to the full flow in the other direction. I hope this helps.
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