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6-3
Assembly/disassembly steps of accessories
1. Disassembly steps
1) Put the accessories on the ground and turn off the
engine.
2) Turn the start switch to the ON position and push the
left control box to the free position.
3) Operate each working device joystick and accessory
control pedal 2 to 3 times forward, backward, left and right
in full stroke to eliminate the internal pressure in the
hydraulic oil circuit.
4) After confirming that the oil temperature has decreased,
lock the rotary valves connected to the inlet and outlet
pipes on the stick side.
5) Remove the hose on the accessory side, put the plug
on the combined washer and tighten it to the two outlets.
6) Remove the accessories by removing the pins (2 pcs).
Then install the bucket.
7) Wrap the unconnected ends of the two rubber tubes of
the hydraulic hammer with a clean plastic bag, and dust-
proof measures shall be taken. Keep well the accessories.
2. Assembly steps
1) Remove the bucket.
2) Put the accessory on a flat place, and connect the stick
and the hydraulic hammer and the connecting rod and the
hydraulic hammer 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.
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...