SWDM40 OPERATION & MAINTENANCE MANUAL
5.5.4 Drilling
5.5.4.1 Short Auger Drilling
According to chapter “Command”, turn the Rotary drive, and open the main winch suspension
function. During the drilling process, the pressure function is adopted to fast promotion. Push
right joystick to left front tilt and make pressurized cylinder down for machine drilling.
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Special attention：No free fall is permitted if machine is not in drilling process.
Drilling depth of each pass will be displayed on the LCD monitor.
1) Control right joystick to make Rotary drive anti-clockwise rotation; the kelly bar and Rotary
drive sleeve disengage.
2) Control left joystick to make main winch lift Kelly bar; control right joystick at the same
time to retract pressurized cylinder and Rotary drive can raise. Fast lifting can be used for
saving time.
3) After short auger up, control left joystick to make upper-carriage swing to crawler side,
control right joystick and press down button SB5 to make Rotary drive rotate fast and spin-off.
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Special Note ： Generally, it is better do not use winch emergency stop to vibrate and unload soil,
which will badly effect winch and steel rope service life, even lead to rope break and accident occur.
4) Rotate turntable anti-clockwise to original position after spinning-off. Operate left joystick to
lower main winch to the position of previous hole depth.
5) Repeat above procedure to complete drill, soil catching, drilling tool hoisting, discharge by
rotation, return & lowering.
6) Clean hole after drilling to due depth and protect hole orifice.
Pay attention during drilling process:
●Keep kelly bar vertical and in correct position. Keep kelly bar from wobbling.
●When lowering Kelly bar, pay attention to the corresponding relation of falling depth and each
section Kelly bar extension order to prevent “rod lock”, “rod wobbling” and “rod cracking”.
●Drill slowly at the beginning, speed up after auger goes inside soil; slow down when drilling
soft-hard soil junction layer.
●Handle with soil near hole port and sleeve in time, an abnormality like high ground water
level, hole collapse or hole shrinking happen should be discussed and treated.
●Do not push to drill when clean hole; do not rotate drilling tool when pulling drilling tool up.
●Before lifting Kelly bar, anti-clockwise rotate Rotary drive to delete occlusion because of
torque transferring. During kelly bar hoisting, check corresponding relation of lifting depth and
each section Kelly bar retraction order to prevent “rod lock”, “rod cracking”
5.5.4.2 Rotary Bucket
1) Install guard barrel. Guard barrel imbedded length is based on soil condition and water table
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