Ditch Witch JT920, Manual

Page: 98 / 169

98
JT920/JT920L - OPERATION
CORRECT DIRECTION
98
JT920/JT920L - OPERATION
CORRECT DIRECTION
CORRECT DIRECTION
Correcting direction is a skill operators gain with experience and
knowledge of equipment and soil conditions. These instructions
only cover basic procedures. For information about specific
equipment or jobsites, contact your Ditch Witch dealer.
To track progress and make corrections, one crew member
locates the drill head and sends instructions to the operator.
Corrections are made by tracking the drill head, comparing
current position to bore plan, and steering drill head as needed.
Basic rules to consider when correcting are:
• Steering ability depends on soil condition; bit, head, and
nozzle used; roll of drill head; and distance pushed without
rotation.
• All corrections should be made as gradually as possible. See
“Bend Limits” in
SETUP .
• Over correcting will cause “snaking.” This can damage pipe
and will make drilling and pullback more difficult. Begin to
straighten out of each correction as early as possible.
• Do not push an entire piece of drill pipe into ground without
rotation. This can exceed bend radius and cause pipe failure.
CORRECT DIRECTION
Correcting direction is a skill operators gain with experience and
knowledge of equipment and soil conditions. These instructions
only cover basic procedures. For information about specific
equipment or jobsites, contact your Ditch Witch dealer.
To track progress and make corrections, one crew member
locates the drill head and sends instructions to the operator.
Corrections are made by tracking the drill head, comparing
current position to bore plan, and steering drill head as needed.
Basic rules to consider when correcting are:
• Steering ability depends on soil condition; bit, head, and
nozzle used; roll of drill head; and distance pushed without
rotation.
• All corrections should be made as gradually as possible. See
“Bend Limits” in
SETUP .
• Over correcting will cause “snaking.” This can damage pipe
and will make drilling and pullback more difficult. Begin to
straighten out of each correction as early as possible.
• Do not push an entire piece of drill pipe into ground without
rotation. This can exceed bend radius and cause pipe failure.