Allied 4001, Техническое руководство, Страница: 24 / 73

6.2.7 Piercing The Underground Hole
1. To “wet” the air line, pour a small
amount of Allied Hog Wash into air line
at the compressor connection and con-
nect it to piercing tool air line.(Refer to
Section 7.0 Lubrication.)
2. Quickly turn on the air supply and im-
mediately reduce air pressure to approx-
imately 2/3 of full open and start
piercing tool penetration into the
ground. It is necessary to apply force in
the direction of motion.
3. After approximately 1/3 of the body
length has penetrated into the forward
wall of the entrance pit, check align-
ment on target and pitch using suitable
level. Refer to Section 6.2.6, step 4 for
the proper pitch.
4. Restart air supply to piercing tool. If tool
fails to start, simply open and close the
quick-acting valve to create pulses of air
to start the tool.
5. Continue checking alignment and pitch
(steps 3 and 4) until the Hole-Hog is
completely enveloped by the forward
wall of the entrance pit.
6. Increase air pressure to 100 psi
(7.0kg/cm
2
) and complete hole penetra-
tion. Never exceed 100 psi (7.0kg/cm
2
).
Pressures above 100 psi (7.0kg/cm
2
) de-
crease tool life.
7. Monitor Hole-Hog progress along the
piercing path. Use the 2-foot tape mark-
ers on the air hose to
estimate the
length of hose used and progress along
the path.
8. The Hole-Hog can be stopped or de-
flected from its path by some under-
ground obstacles.
· If the Hole-Hog stops moving along
the path, it has hit an obstacle.
· If total path marker on the air hose is
reached but the Hole-Hog has not
reached the target or exit pit, the
Hole-Hog has been deflected by an
obstacle.
In either case:
a. Retrieve the Hole-Hog by reversing
Hole-Hog direction as described in
Section 6.2.8.
~
WARNING
Locate all utility lines before start-
ing operation of the Hole-Hog. Use
extreme caution working with elec-
tric and gas lines. Cutting a utility
line could cause serious injury or
death.
Verify location of all utilities before
starting a second hole.
b. Pierce another hole that will bypass
the object, repeating steps 6.2.6 and
6.2.7. In extreme circumstances it
may be necessary to relocate the en-
trance or exit pit.
9. When the Hole-Hog reaches the exit pit
or target, stop compressed air delivery
by closing the air supply valve.
DO NOT REMOVE THE HOLE-HOG
from the exit pit or pierced hole.
10. Before removing the Hole-Hog from the
exit pit or pierced hole, verify the means
by which the pipe, tube, cable, etc. will
be installed in the pierced hole.
Refer to Section 6.2.9 Install Material in
the Pierced Hole.
A
LLIED 4000 Series Hole-Hog
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