TM 5-3820-256-10
(3)
Set the oiler on/off switch to ON.
(4)
Check the volume of flow by observing, through the pump sight glass (6), how many drops of oil fall from
the end of the tube with each stroke of the pump. If adjustment is needed, loosen the locknut (4) and turn
the adjusting screw (5) out (counterclockwise) to increase the volume or in (clockwise) to decrease volume.
Tighten the locknut when adjustment is complete.
(5)
To stop the oiler, set oiler switch (1) OFF and close valve (3).
f. Water/foam injection system. Water and foam is injected into the air discharge line during air-drilling operations.
(See FM 5-166 for information about when water/foam injection is required.) To operate the water and foam
injection system, proceed as follows: (1) Be sure the water tank has been filled with water. Be sure a foam
container has been installed and the pulse pump suction tube is positioned in the container.
(2)
Start the air compressor (see above).
(3)
Open the water/foam injection valve (4, figure 2-5).
(4)
Move the water injection control (1) to ON. Rotate the water injection volume control (2) counterclockwise
to operate water injection pump. Pump speed and the rate of water delivery increases the further you turn
the knob counterclockwise.
(5)
To add foam, open the valve between the foam pulse pump and the water injection pump. Close the valve
when foam is no longer needed.
(6)
To stop injection, move the water injection control (1) to OFF and close the water/foam injection valve (4).
Leave the volume control (2) set if you wish to inject the same volume the next time you use the injection
system.
g. Break-out assembly. The breakout assembly is used as a mechanical leverage for loosening pipe joints when
removing pipe from the hole. Operate the break-out assembly as follows: (1) After a joint of pipe is above the
rotary table, set the slips to suspend the drill string in the rotary table.
(2) Operate the break-out control (1, figure 2-7) OUT to provide slack in the wire rope that links the cylinder to
the break-out wrench.
(3)
Attach the wrench to the drill pipe, above the joint to be separated.
(4)
Momentarily, move the break-out control (1) to the IN position to take the slack out of the wire rope line.
When the line is taut, continue using the break-out control (1) IN to break the joint.
(5)
Repeat steps 2, 3, and 4 until pipe turns easily.
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