JT40/JT40 All Terrain Operator’s Manual Conduct a Bore - 139
Record Bore Path
7. Pause carving. Move thrust control back from neutral.
8. Resume carving. Move thrust control to full forward and then release to neutral to start alternating
rotation.
9. Ream a newly carved section. After carving a few inches, press and hold the 2-Speed button and
move rotation control to full clockwise rotation for maximum rotation. When tool rotates freely, reduce
rotation speed and stop at desired carve position. Release 2-Speed button and resume carving.
10. Exit carve mode. Press bottom of AutoCarve switch. Carriage movement and rotation will stop.
Continue normal drilling.
Note: For quicker setup during a long bore, autocarve thrust and rotation settings are retained until the
unit is shut down.
Record Bore Path
Locate drill head every half-length of pipe. As the job is completed, record the actual data for each drill
pipe. List pitch and depth of each joint and a brief description of the procedure. In addition, draw a simple
sketch of the site and record depth and rough location of pullback.
Subsite
®
Electronics bore tracking software is also available for plotting and tracking your bore path.It
utilizes a Subsite Electronics tracking system, including a tracker, display, and tracking beacon, and
special software. The display can store jobs in its memory or the system can be run in the field using a
laptop computer. See your Ditch Witch
®
dealer for details.
IMPORTANT: If full rotation seems restricted and insufficient to ream the hole, move carriage
back slightly until full rotation is possible, then move carriage forward while rotating.
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