SOURCE: Hi. I just received a Starrett 98Z12 machinist
Sit level on near level surface. Observe bubble position. Turn level end for end. Does bubble sit at same position? If not adjust screw untill they match. Test, adjust and so on.
SOURCE: How do you replace the bubble in a starrett 98 Level
Contact me at Starrett and I can email you the instructions on how to change the vial only if you want. The other option is to purchase a new tube and plug assembly (the silver tube with the vial). That is much easier to do. After, you can always send the old one in for repair. Third option is to send out the tube and plug assembly to be repaired.
Most people will change the vial only the first time, after that they go with option 2 or 3.
My email is [email protected]
Starrett Tech Support
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