BA 9137 en 12/2015
10.7.3
Check tightness of screw connections
All screw connections that are used for inspection or maintenance have to be checked for firm seat (see
item 6.12 "Screw connection classes, tightening torques and initial stressing forces").
Tighten plate screws with the required initial stressing force or torque.
The initial stressing force or torque can be found on the dimensions sheet.
Note
The separate operating instructions have to be observed if "superbolt nuts" are used.
Note
Damaged bolts must be replaced with new bolts of the same type and strength class.
10.8
Welding work on the mill
Note
Siemens will accept no liability for damage caused to the gear unit by welding work carried out on the
mill.
DANGER
Risk of personal injury from electrical shock or through electrostatic discharge
Risk of electrical shock during welding work or risk of personal injury from ignition of a present explosive
atmosphere caused by electrostatic discharge.
Before welding work may be conducted on the mill, a potential equalisation must be provided
according to the regulations and/or guidelines applicable for this purpose!
The gear unit must not be used as an earthing point for welding operations.
Optionally, an earth wire may be present on the tilting pad thrust bearing chamber, which must be
connected with the output flange. For this purpose, use the threaded holes provided on the side of the
output flange. When the welding work has finished, the earth cable must be removed from the output
flange.
Threaded holes for an earth connection are provided on the gear units or on the output flange. This work
must always be done by
trained electricians
.