Hilger Watts Theodolite Manual Repack
: For long-distance transport, ensure the external case is shock-proof. Avoid leaving the cased instrument in extreme heat (like a car trunk) for long periods, as it can adversely affect performance.
In essence, the , ensuring that a Hilger & Watts theodolite owner can still access the manufacturer’s original guidance on setting up, levelling, angle measurement, and adjustment.
Ensure the optical plummet eyepiece is tucked in or protected according to the case’s internal mold. Securing the Instrument
Repacking the bearings of a is a delicate restoration task typically performed to resolve stiff motion caused by aged, hardened grease . Because these vintage instruments use high-precision bearings, the process requires surgical cleanliness and specific lubricants to maintain original accuracy. Core Repacking Process hilger watts theodolite manual repack
Take high-resolution macro photographs at every stage of disassembly. Capture the orientation of washers, the depth of screws, and the routing of internal optical paths or light-conducting prisms. Take pictures before and after you remove every sub-assembly. Witness Marking
Once repacked, the instrument must be recalibrated to ensure accuracy. Critical tests include:
Action: Clean, polish, and lubricate with a light, non-gumming instrument grease. B. Tangent Screws and Clamps : For long-distance transport, ensure the external case
A proper repack is more than just a scanned booklet. A high-quality repack consists of five critical components:
Carefully draw the central vertical spindle out of its housing. This is a clearance-fit component machined to tolerances within microns. Pull it straight out without rocking or tilting it to prevent scoring the bearing surfaces. 4. Cleaning Protocol and Removing Degraded Grease
Precision screwdrivers, specialized spanners (for ring nuts), tweezers, and soft lint-free cloths. 4. The Repack Procedure Ensure the optical plummet eyepiece is tucked in
Slowly pull the inner spindle out of the outer sleeve. Do not force or tilt the spindle during extraction; the tolerances are incredibly tight.
Electronic Theodolite Operation & Maintenance Guide | PDF - Scribd
Apply a drop of fine watch oil to the pivot pins and spring-loaded plunger housings that provide counter-tension to the tangent screws. 6. Reassembly and Calibration Checks
Loosen the main axis retaining nut or plate located at the bottom of the center spindle.