TDW PIG-SIG V - Page 55

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Section IV – Pipeline Under Pressure
3.0 Continued
Figure 4.58. T-101a.
Figure 4.59. T-101b
Both of these methods lock the feed tube and
boring bar together permitting extension and
rotation of the boring bar at the same time.
B. Attach the crank handle to the ¾-inch hex drive.
C. Slowly rotate the crank handle counterclockwis
e
unt
il the pressure starts to flow past the PIG-SIG
V (Figure 4.60).
D. Purge air through the bleeder valve.
E. After air is completely purged, close the bleeder
valve (Figure 4.61).
⚠ WARNING
If the PIG-SIG V cannot be removed, do not force the
drilling machine as damage may occur. Do not
proceed; call your Service Center. The fitting may
need to be abandoned.
Consider the dangers of product when purging from
the drilling machine adapter.