JT1220 Mach 1 Operator’s Manual Systems and Equipment - 123
Tracker Control
CMW
Disable Thrust and Rotation
1. When drill head enters target pit or exits the ground,
turn off tracker.
After 8-16 seconds, green tracker control light
(shown), located on drilling unit anchoring console,
will come on. Hydraulic power to thrust and rotation
will be disabled.
2. Change downhole tools.
3. If you are tracking backreamer’s path, turn on
tracker and enable code transmission. After 8-16
seconds, green tracker control light on drilling unit
anchoring console will go off and thrust and
rotation will function.
If you are not tracking backreamer’s path,
install tracker control key (shown) on drilling unit.
Green tracker control light on drilling unit
anchoring console will go off and thrust and
rotation will function.
IMPORTANT: Tracker operator cannot disable thrust
and rotation from tracker if tracker control key
(shown) is installed in drilling unit and turned to the
disable position. See “Tracker control key” on
page 20 for more information.
NOTICE: If you are not using tracker control, turn off
drilling unit before changing downhole tools.
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