TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

Oil dag should be applied as above to ratchet wheels when clean. Subsequent
lubrication to be carried out as follows:
A small stiff bristle brush should be moistened with high grade clock oil and
worked down into the roots of the teeth in order to work up the remaining graphite
into a suitable consistency and to distribute the lubricant. Where insufficient graphite
remains, or where the lubricant is dirty, the ratchet should be cleaned by means of the
bristle brush and clock oil (the detent springs being removed). The brush should be
pressed well down on to the roots of the teeth in order to remove as much as possible
of the old lubricant and the brush should, during this process be wiped on a piece of
rag. When the ratchet has been cleaned, oil dag should be applied sparingly to all teeth
by means of a soft sable hair brush.
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