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6-12
Drilling device
1. Installation of drilling device
1) Remove the bucket or other accessories.
2) Put the accessory on a flat place, and connect the stick
to the drilling device and the connecting rod to the drilling
device with pin A and pin B in turn.
3) After confirming that the oil temperature has
decreased, remove the plugs from the outlet and inlet
respectively. Be careful to prevent dust, dirt, etc. from
sticking to the hose port.
If the combination gasket is damaged, replace it with a
new one.
4) Connect the hose on the accessory side. During
connecting, check the flow direction of the oil, and be
careful not to make a wrong connection.
5) Unlock the rotary valves connected to the inlet and
outlet pipes on the stick side.
6) After installing the accessories, confirm whether the oil
level in the hydraulic oil tank is proper.
2. Operation of drilling device
1) Operate the pilot valve handle that controls the boom
and stick, and lift the top of the drilling tool vertically.
Operate the boom oil cylinder to gently press the drill bit
against the ground, lift the front part of the machine, and
exert pressure on the drill bit during drilling.
2) Step down the auxiliary control pedal, and the drilling
tool starts to work (rotate) when it reaches a certain depth.
Operate the boom cylinder and stick cylinder to pull the
drill bit out of the drill hole when the drilling tool still
rotates.
3) If there is mud on the drilling tool, the drilling tool can
rotate reversely by operating the solenoid valve, and the
mud will fall off.
Pin
Pin
Summary of Contents for U27
Page 1: ...U27Hydraulic Excavator Instruction Manual Guangxi Yuchai Heavy Industry Co Ltd...
Page 5: ...1 1 Preface...
Page 17: ...2 1 Safety regulations...
Page 44: ...3 1 Parts introduction...
Page 49: ...3 6 Panel meter Oil level pointer Timing display Water temperature pointer Indicator area...
Page 55: ...4 1 Operation guide...
Page 89: ...5 1 Maintenance...
Page 130: ...6 1 Accessories guide...