38
Section IV – Pipeline Under Pressure
2.0 Installation
2.6 Setting The Plug
A. Remove the crank handle from the hex drive.
B. Unlock the boring bar and feed tube by th
e
f
ollowing:
Model T-101a: Loosen the 1/8-inch Allen socket
head screw on the bearing retainer nut (Figur
e
4.
30).
Model T-101b: Remove the locking cap (Figur
e
4.
31).
C. Rotate the feed tube counterclockwise
approximately 24 turns, retracting the plug holder
two inches above the PIG-SIG V. Ensure the hex
drive does not rotate, otherwise the PIG-SIG V
will unthread from the fitting.
D. Check the seal on the PIG-SIG V by opening the
bleeder valve on the drilling machine for several
minutes (Figure 4.32). Leave the bleeder valve
open after pressure is completely relieved.
CAUTION
Do not turn the crank handle
counterclockwise with the 1/8-inch
Allen socket head screw tightened or
the locking cap on the machine. This
will unthread the PIG-SIG V.