Toro 2226 Operator's Manual page 59

Boring the Entry Shaft
The first step is to create the entry shaft. Push and
bore the drill bit and the first few pipes into the ground
at an angle from 0 to 16 degrees (with the tracks flat
on the ground) until you reach the desired depth.
Important:
Drill and ream in a clockwise rotation.
If you use a counterclockwise rotation, the pipe
will disconnect from each other and may be
disconnected underground.
1. When the area is clear of people, disable the
exit-side lockout using the exit-side-lockout
transmitter; push the exit-side-lockout, reset
switch on the control panel.
2. Turn on the drilling fluid pump switch and allow
the fluid pressure to build to 1379 to 2068kPa
(200 to 300 psi).
3. Rotate the drill head until the bit is at the 6
o'clock position.
4. Move the carriage forward driving the bit straight
into the ground until the entire dill housing is
underground.
5. Continue pushing forward and begin rotating
the drill spindle clockwise to initiate the drilling
action.
6. Drill forward until the carriage reaches the end of
the frame, then retract it about 6 mm (1/4 inch).
Adding Drill Pipes
1. Align the pipe joint in the wrench assembly.
2. Close the lower wrench (stationary wrench) onto
the first pipe.
Note:
The drilling fluid automatically shuts off
when you activate the lower wrench.
3. Pull back the carriage approximately 12.7 mm
(0.5 inch).
Note:
This allows the carriage to float and not
damage the pipe threads.
4. Rotate the drill head counterclockwise until the
spindle is completely removed from the pipe.
5. Spray the spindle with thread joint compound,
then return the drill carriage to the upper end
of the frame.
6. Rotate the cam assembly to the closest row of
pipes in the pipe holder.
7. Lower a pipe into the cam assembly and grip
it in place.
8. Rotate the cam assembly toward the drill frame,
and extend the pipe grippers until the pipe is
centered over the drill string and in front of the
spindle on the carriage.
9. Rotate the drill spindle clockwise and move the
carriage slowly forward to insert the spindle into
the female end of the pipe
Note:
Tighten the joint until the pipe is rotating
with the spindle.
10. Move the drill carriage slowly down the frame
until the male threads on the pipe are under
the thread-joint-compound applicator and apply
thread-joint compound to the threads.
11. Rotate the drill spindle clockwise and move the
carriage slowly forward to insert the male end
of the pipe into the female end of the previous
pipe. Tighten the joint until you reach no more
than 2,304 N∙m (1,700 ft-lb).
12. Release and retract the pipe gripper, rotating it
all the way out past the third row of pipes.
Important:
Ensure that you fully retract the
pipe gripper and rotate it all the way out;
otherwise the carriage may collide with the
gripper, damaging the machine.
13. Release the wrench and continue the drilling
operation.
Steering the Drill Head
The drill bit is shaped like a wedge, angled from one
side of the bit to the other. When you push the bit
through the soil without rotating it, it moves toward the
direction that the wedge is pointing. When you rotate
the pipe and drill head, it bores through the soil in a
straight path.
1. Drill bit
When drilling, a crew member follows the drill head
as it progresses. The receiver receives signals from
the sonde in the drill head identifying its position,
depth, pitch, direction, transmitter temperature, and
orientation in the soil. The remote console is a screen
that remains near you (the drill operator) to show you
the information from the receiver while drilling so that
you can make steering decisions.
For detailed information on using the receiver and
remote console to guide the drill head, refer to the
Operator's Manual that came with your receiver.
Important:
Do not steer the drill head more than
20 cm (8 inches) off center for every 3 meters (10
59
(Figure 65).
Figure 67
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