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2.
Using breakout tools, remove the drill head from
the lead bar.
Important:
Do not use pipe wrenches.
3.
Double check the reamer to ensure that the fluid
ports are clean and free from obstructions.
4.
Install the reamer and swivel onto the end of the
lead bar as directed by the reamer manufacturer.
5.
Connect the product to the reamer using an
appropriate pulling connection; refer to your
Authorized Service Dealer to acquire the
appropriate puller to meet your requirements.
Removing Drill Pipes
1.
Using the exit-side-lockout transmitter, enable
the exit side lockout.
2.
Install a drill-pipe wiper around the pipe and into
the retaining bracket on the front of the machine.
This removes most of the dirt and mud from the
pipe as you pull it back into the machine, keeping
the machine clean. Contact your Authorized
Service Dealer to purchase drill-pipe wipers.
Figure 68
3.
Disengage the exit-side lockout and reset the
system.
4.
Begin rotating the drill spindle clockwise and
slowly retract the drill carriage to pull the pipe
back into the machine.
5.
When the joint between the pipes is centered
between the 2 wrenches, the drill carriage stops,
and a green light illuminates behind the spray
valve.
6.
Close the lower wrench onto the pipe joint.
Note:
The drilling fluid automatically shuts off
when you close the lower wrench.
7.
Close the upper wrench onto the pipe joint.
8.
Rotate the upper wrench counterclockwise until
the joint is loosened.
9.
Release the upper wrench and retract the pipe
gripper arms.
10.
Rotate the drill spindle counterclockwise moving
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rearward slowly until the pipes are separated.
11.
Move the drill carriage back until the male-pipe
threads just clear the female end of the lower
pipe, then close the upper wrench onto the pipe
shoulder, but not on the threads.
12.
Rotate the drill spindle counterclockwise until
the upper-pipe joint is loose but not separated.
13.
Release the upper wrench.
14.
Rotate the cam assembly to the drill frame,
extend the pipe-gripper arms to the pipe, and
grip the pipe to support it.
15.
Move the drill carriage back until the pipe is lined
up with the pipe holder load position, illuminating
the green light.
61
Figure 69
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