Doc No. 740048
10
MODEL 96
TUBE TO TUBESHEET WELD HEAD
OPERATION MANUAL
5.0 MANDREL INSTALLATION
(contd.)
CAUTION!
Expanding the mandrel when it is not inserted into
an appropriately sized tube can damage it.
Fig. 6
Mandrel release position.
5.2 Remove the thumb nut and washer from the top of the
mandrel and slide the mandrel shaft into the center hole next
to the electrode holder. Slowly rotate the mandrel until the
threaded end protrudes through the top of the weld head.
Reinstall the washer and thumb nut, and gently hand-tighten.
CAUTION!
TO PREVENT OVER-STRETCHING OF THE MANDREL,
DO NOT ACTUATE THE AIR CYLINDER UNLESS THE MANDREL IS
INSTALLED INTO THE APPROPRIATE SIZE TUBE.
THE MANDREL IS SPRING-LOADED. DO NOT ATTEMPT TO
DIS-ASSEMBLE IT WHILE IT IS INSTALLED IN THE WELD HEAD
