CAME G4040Z Manuel D'installation page 35

Hook the eyelet rod to the anchoring rod .
Release the gearmotor and manually turn the spring to increase or reduce traction . The boom should stabilize at 45°.
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4
Fasten the counter nut and lock the gearmotor again.
 Check the proper working state of the spring.
With the boom raised vertically the spring is not taut.
With the boom lowered horizontally the spring is taut.