Maintenance - RT's Radio Home Page
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Maintenance
Amateur Radio > E.F. Johnson Restoration
Maintenance
Once the Ranger and Valiant are initially restored to good working order and kept in a climate controlled environment, dust is likely the main culprit. Best to keep the rig covered when off line for extended periods. Of course, lubricants in the various shafts degrades over time and must be reapplied. Peridic cleaning of the area around the rectifier tube sockets is advisable whenever the case is removed.
The original Viking Five Hundred fan motor needs lubrication at least once a year. Perhaps more frequent lubrication is warranted depending on the accumulated hours operating. A modern fan motor that requires no periodic lubrication could be installed.
The grease in the VFO reduction drive dries out over decades. When this drive is cleaned an re-greased, use a generic plain grease. Avoid using Lubriplate--it is so lubricating, the drive can and will slip. I know this from experience.