Centering a power steering box involves finding the midpoint of its travel. One method involves turning the steering box from lock to lock and then dividing that total rotation in half. Here's a breakdown:
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Turn the steering box to one extreme (lock). Count the number of turns it takes to reach the opposite extreme (full lock in the other direction). Note this number.
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Turn the steering box back half the number of turns counted in step 1. This will position the steering box as close to its center as possible. For example, if it took 4 total turns from lock to lock, rotate it back 2 turns from either lock position. If the total rotation from lock-to-lock is not a round number (example: 4 and 1/4 turns), then divide the fraction of a turn in half, too. (Half of 1/4 turn is 1/8 turn).
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Verify centering: Now, turn the steering box slightly in each direction. The amount of turning in each direction from the center point should be equal to ensure correct centering. As stated in the reference, if after counting to one lock, it measures "one two and 1/8" turns, then turn back to the original position to ensure steering box is centered.
By following these steps, you can effectively center your power steering box, which is crucial for proper steering alignment and vehicle handling.