This depends on whether your model uses a vernier scale (older) or a micrometer (newer Microptic models).
Re-insert the vertical and horizontal axes, ensuring all tensioning nuts and thrust washers are returned to their exact original positions. hilger watts theodolite manual repack
Mount the theodolite firmly on a baseline testing table or a stable tripod setup. Systematically test the resistance of the horizontal axis rotation, the telescope vertical swing, and all fine-adjustment tangent screws. Isolate where the mechanical binding or gritty movement is located before disassembly. This depends on whether your model uses a
Carefully back out the screws and lift the cover vertically to avoid striking the delicate, graduated glass circle inside. Loosen the vertical clamp and tangent screw mechanism. Systematically test the resistance of the horizontal axis
Are any of the controls currently , or are they just stiff?
Multi-compartment pillboxes or ice cube trays to organize parts sequentially by disassembly step. Solvents and Lubricants
Locate the pivot bearings supporting the telescope axis (trunnion axis). Remove the retaining caps. Note that these caps often use shims to control endplay; track these shims precisely.