Systems and Equipment - 174 JT40/JT40 All Terrain Operator’s Manual
Drill Pipe
Make Up and Break Out Joints Correctly
Assisted Makeup protects threads by automatically matching carriage movement speed to rotation during
makeup and breakout.
• To connect pipes together and fully tighten joint, slowly rotate pipe until spindle stops turning and
full pressure is developed. Improperly tightened joints will damage the shoulder faces and threads,
and will cause joints to leak or break while drilling or backreaming.
• To disconnect pipes, slowly rotate spindle counterclockwise. Carriage will move back automatically
as threads fully separate.
Make up and break out joints slowly. Do not ram pipes together during makeup or force them apart
during breakout. Carefully match carriage travel speed to rotation speed, and always connect and
disconnect joints slowly and deliberately. This will help prevent thread crossing, galling, and shoulder
swelling.
Makeup
• Carefully move carriage forward until
spindle (or pipe) contacts threads of pipe in
the wrench and begins to collapse spring
on the side of the carriage (shown). Stop
thrusting and rotate clockwise until spring is
fully relaxed. Carefully move thrust forward
as you spin the threads together, keeping
the spring as relaxed as possible.
• Tighten joints fully. Once the joint is
connected and the shoulder faces are
touching, tighten to full machine torque.
Improperly tightened joints will damage the
shoulder faces and threads, and will cause
joints to leak or break while drilling or
backreaming.
Breakout
Carefully move the carriage backward until the spring on the side of the carriage is almost fully collapsed.
Do not fully collapse the spring. Stop thrusting and rotate counterclockwise until spring is fully relaxed.
Carefully move thrust backward and spin the threads apart, keeping the spring as relaxed as possible until
the pipe joint is fully separated.
IMPORTANT: If assisted makeup is not functioning, unit will not thrust or rotate while carriage is on front
or rear home with front wrench closed. Press and hold multi-use button to operate thrust and rotation
and follow these instructions.
j59om014w.eps
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