Greenlee UT10 Ultra Tugger Manual De Instrucciones página 30

Removing Cable
Removing old cable involves the same principles as
installing new cable. However, there are some important
differences.
Pulling Force
It is difficult to predict the amount of pulling force
necessary to remove an old cable. The cable may be
damaged, and it may break with an unexpectedly low
pulling force.
The required pulling forces may be very high:
• The cable has probably "taken a set." Unlike the new
cable on a reel, cable in conduit has probably been in
the conduit for years, or perhaps decades. The cable
will resist bending and straightening as it is pulled
through the conduit.
• The pulling lubricant has probably hardened,
increasing pulling resistance.
• The insulation may be damaged and the cable may be
corroded.
• Dirt or other foreign matter may have entered the
conduit and may have cemented the cable in place.
Greenlee / A Textron Company
®
Ultra Tugger 10 Cable Puller and Pulling Packages
30
Puller Placement
Pulling out old cable is generally accomplished with the
puller located some distance away from the end of the
conduit. This allows the pulling crew to pull out a long
section of cable before turning off the puller, cutting
off the cable, and reattaching the grip(s). Mounting the
cable puller a distance away from the end of the conduit
increases the amount of exposed rope, which greatly
increases the amount of violent whipping action which
would occur if the rope were to break.
To isolate the operator from the rope path:
• Locate the puller so that you will stand behind an
obstruction, such as a wall. Set up the puller so that
you will be able to maintain control of the pull. You
need a clear view of the rope as it feeds onto the
capstan, including several feet of the rope in front of
the capstan. You must be able to turn off the puller
before the pulling grip, connector, or swivel contacts
the capstan.
• Use an additional pulling sheave (if necessary)
to change the direction of the tailing rope. Anchor
the sheave so that you are close enough to maintain
control of the pull. You need a clear view of the rope
as it feeds onto the capstan, including several feet of
the rope in front of the capstan. You must be able to
turn off the puller before the pulling grip, connector, or
swivel contacts the capstan.
Note: Use the additional pulling sheave to change the
direction of the tailing rope (after the rope leaves the
capstan). Do not change the direction of the pulling
rope.
• Use a longer tailing rope than usual and stand away
from the puller. Stand as far from the puller as pos-
sible, while maintaining control of the pull. You need
a clear view of the rope as it feeds onto the capstan,
including several feet of the rope in front of the
capstan. You must be able to turn off the puller before
the pulling grip, connector, or swivel contacts the
capstan.
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