OPERATION
BG 25 / 2011 /
2254_BG25_en_0000498763_V01
5 - 4
5.3
MAST REPOSITIONING
CAUTION
Risk of damaging components!
The mast must be parallel to the drilling axis at all times!
During drilling mode
– and especially during casing oscillator applica-
tions
– it is important to watch the inclination of the mast on the
operator’s screen. Should the inclination change due to the forces, the
mast must be repositioned to the original inclination.
CAUTION
Risk of components getting damaged and the rope breaking!
On machines where the winches are housed in the uppercarriage, the
ropes must be sufficiently slackened before the mast is repositioned.
Otherwise, the ropes may be subjected to excessive stress.
CAUTION
Risk of components getting damaged and the rope breaking!
On equipment fitted with an overload protection for the main rope, vari-
ous functions will shut off when the rope is overloaded and a message
will appear on the operator's screen.
When this is the case: unlock the Kelly (if locked) and spool out rope
from the main winch.
Immediately replace any damaged components of the overload protec-
tion.
