ABB IRB 2000 - Page 22

15.
Tighten
the
screws
evenly
when
fastening
the
flange
joint.
16. Ensure that the joint is not subjected to loads before the sealing compound has
hardened in accordance with the material specification.
O-rings
17.
Check
the
O-ring
grooves.
The
grooves
shall
be
geometrically
correct
and
free
from
pores and contaminations.
18. Check the O-ring with regard to surface defects, burrs, accuracy to shape etc.
19. Ensure that the correct O-ring size is used.
20. Tighten the screws evenly during the mounting.
21. Defective O-rings and O-ring grooves shall not be used.
22. Mounting of defect details will result in leakage. Grease the O-ring with 1171 4012-
201 before mounting.
1.5 Instructions for Tightening of Screw Joints
General
It is of greatest importance that all screw joint are tightened with the correct torque.
Application
The following tightening torques shall be used for all screw joints in metallic materials if
not otherwise specified in the text.
The instructions do not apply to screw joints comprising soft or brittle materials.
For screws with higher property class than 8.8, the data for 8.8 shall be used unless
otherwise specified.
5.14.3 Assembly
Screw thread dimension M8 or bigger shall preferrably be lubricated with oil. Lubrication
with molybdenum disulphide grease shall only be used when specified in the text.
Screws with dimension M8 or bigger shall be tightened with torque-key if possible.
Screws with dimension M6 or less may be tightened to the correct torque with tools
without torque indication, by personnel having the adequate mechaniecal training and
instruction.
Mechanical repair
IRB
2000