Volvo 780 Owner's Manual page 69

1989 Volvo 780
Remove the wheel cap, using the screwdriver in the tool kit.
With the car still on the ground, use the box wrench from the tool kit to loosen the wheel nuts 1/2 - 1
turn. Turn the nuts counterclockwise to loosen.
NOTE:
To avoid excessive wear and the necessity of rebalancing, mark and reinstall wheels in same location as
before removal.
To lessen the chance of imbalance, each wheel hub is equipped with a guide stud to ensure that a
removed wheel can be reinstalled in its original position (as when changing over to winter tires/wheels).
pg. 66 Tire changing
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