CommScope Trunk & Distribution Cable - Manual (Page 46)

Underground Installation - Vibratory Plow Movement
Handling obstructions
If obstructions (tree roots, large rocks, etc.) are encountered, disengage the transmission, turn the engine off and
then disengage the clutch. NEVER BACK THE PLOW WITH CABLE IN THE FEED TUBE. This will damage the
cable and pack dirt into the feed tube.
Carefully dig a pit behind the blade. Remove the cable, then remove the obstruction. Replace the cable and
proceed with the installation.
Although aggressively steering and lifting/lowering the blade are considered poor practice, these techniques can
be used as long as extreme caution is exercised.
Turning
Gentle turns can be made over a distance of 5 - 8 feet (1.5 - 2.4 meters). Never turn the blade unless the tractor
is moving forward. Some manufacturers make steerable blades.
Lifting the blade
If absolutely necessary (for instance, avoiding a buried utility line), the blade can be gradually raised at a rate of 8
inches (20 cm) over a 5 foot (1.5 meter) run. Lower the blade at the same rate once the underground hazard has
been passed. Do not raise the blade to ground level with cable in the feed tube.
5.5 Underground Installation
Vibratory Plow Movement