
APPENDIX
B–70115EN/03
F. REFIXING AND REPLACING
GAS TUBE
464
1 Cut the tube perpendicular to its length, then mount new ferrules on
the tube.
Referring to Fig. F.1, mount fixing nut, back ferrule, and front ferrule
onto tube.
Here make sure not to introduce dust into tube and ferrule. If dust
entered, wipe with soft and clean cloth.
NOTE
Old fixing nut can be used. However, only new ferrules can
be used. Otherwise it leads to vacuum leakage.
2 Mount tube. In fixing nut, hold fitting base with wrench.
3 Fasten tube.
i) Push tube so that the front ferrule contacts sealing surface of fitting.
ii) Rotate nut with finger as tightly as possible.
iii)Holding the fitting base with wrench, rotate nut with wrench by 1/4
rotation.
F.2
REPLACING TUBE