MAINTENANCE
BG 25 / 2011 /
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9.13 BOLTED CONNECTIONS
After the first 250 operating hours, re-tension all the bolted connections described in
the following.
NOTE
Generally, apply the prescribed torque on these bolts to tension them
("torque pretension method").
Bolted connections of Mast sections
Every 5000 hours of ordinary operation, replace all elements used in the bolted con-
nections.
WARNING!
Serious accident hazard!
Replace the elements of bolted connections which have been opened-
up more than 25 times or which are corroded, fissured, deformed or
have damaged threads.
Bolted connections of Mast pivot, Winch trestles, Roller brackets and Masthead
Every 10000 hours of ordinary operation, replace all elements used in the bolted
connections.
WARNING!
Serious accident hazard!
Replace the elements of bolted connections every time components are
mounted or reassembled anew and whenever the connections have
been excessively stressed from rig tipping or improper handling.
