If the deflection is about 10 mm, the tension is correct.
If is not so, proceed with the adjustment in the following way (see picture below):
• loosen the four nuts (1) under the gearbox which lock it to the frame;
• loosen the two bolts (2) fixing the extension tube to the side plate of the frame;
• while holding the screw (3), loosen the lock nuts (4);
• tighten the tension nut (5) if the tensioning found is too low (deflection of belts higher than 10 mm);
unscrew the tension nut (5) if the tensioning found is too high (deflection of belts lower than 10 mm).
• retighten the two bolts (2) fixing the extension tube to the side plate of the frame;
• move the gearbox in order to restore the position of the extension tube perpendicular to the side plate
of the Flail Mower;
• retighten the four nuts (1) under the gearbox;
• reposition the safety cover in his original place.
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