26 ©2017 Johnson Level & Tool - Rev. 1
4. Rotate the hex wrench to center the bubble. Tightening
(clockwise rotation) will move the bubble AWAY from the
adjustment screw. Loosening will move the bubble TOWARDS
the adjustment screw.
5. After the vial is calibrated, reinstall the vial adjustment bolt cover.
Remove vial adjustment
bolt cover
Calibrate the vial using
2.5mm hex wrench
1658i-English_Manuals 1/11/17 11:50 AM Page 26
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