Ditch Witch JT1220 - Manual (Page 112)

JT1220 Mach 1 Operator’s Manual
Conduct a Bore - 111
Remove Pipe
CMW
Remove Pipe
1. Enable automated pipeloader system (automated pipeloader control only). See page 103.
2. Stop carriage when pipes are aligned in wrenches.
3. Clamp pipe in front wrench. See page 98.
4. Clamp and rotate rear wrench to break front joint. See “Wrench control” on page 25.
5. Disengage rear wrench.
6. Close grippers:
7. Break front joint.
• Slowly rotate spindle counterclockwise to separate pipe. Carriage will move back automatically
until threads unscrew.
• Move carriage back until pipe is properly positioned in rear wrench.
IMPORTANT: If gripper switch is not in the grip position when using optional pipeloader automation,
grippers will open when automation is stopped and gripped pipe could be dropped. To return a dropped
pipe to the drill string, see “Correct Dropped Pipe” on page 135.
NOTICE: If engine is shut off during backreaming, drill pipe clamped by wrenches but not connected to
saver sub can be pulled downhole as vise wrenches loosen.
Manual Pipeloader Controls Automated Pipeloader Control
• Open grippers.
• Lift pipe off shuttles.
• Extend shuttles to spindle position.
• Close grippers.
• Lower lifters.
• Press resume. Green control cycle light
will come on.
• Shuttles will extend, grippers will grip, pipe
lifters will lower, and then green control
cycle light will flash.