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GEAX
s.r.l.
3.3 Adjusting the limit switch mechanisms.
Adjusting the main winch limit switch
3.3.1
The limit switch of the main winch is sensitive to rope loosening when the tool
touches the ground (limit switch in descent):
• when the rope is loose (Kelly bar or tool mounted on the Kelly bar which
rests on the ground), the roller A moves downwards and the leverage
through switch B closes the limit switch contact; the two return springs
C should remain loose with a space between spring and abutment of 5
mm: loosen or pull the D nuts which press on the springs up to the
indicated measure;
• when the Kelly bar with the mounted tool is lifted, the rope is stretched
raising the roller and the leverage releases the switch, which in turn
opens the limit switch contact;
MAINTENANCE ACCORDING TO THE CONDITIONS OF THE DRILLING M.
Chapter 3
fig. 3.3.1.1
3-11
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