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3. Trenching operations
Make the bulldozer shovel behind and anchor into the soil.
Extend the boom and stick, and insert the bucket teeth into the soil.
Use the stick cylinder to excavate. During the excavation process, adjust the cutting angle and
loading angle of the bucket in a timely manner, or use the bucket cylinder to excavate. Do not insert
the bucket teeth too deep into the soil when digging, so as not to dig the soil due to overload of the
hydraulic system. In the case of unmovable soil excavation, the boom can be raised appropriately,
and the situation will change. After digging a full bucket, raise the boom and stick to make the bucket
higher than the ground, and turn the platform to a proper position to unload the soil.
Note:
1) Do not touch the aerial wires.
2) After clarifying the conditions of the underground pipelines and cables, start excavating to avoid
damage to the pipelines and electric shock accidents.
3) In the event of an electric shock, the driver should not leave the seat and warn others not to
approach. Drive the machine to a safe area, cut off the power, and then leave.
4. Backfilling or leveling
In order to fill the ditch, the direction of excavator travel is perpendicular to the ditch. After cutting the bulldozing board
into the soil to a certain depth, loosen the bulldozing lever, start the machine to walk, and use the bulldozing board to
push the soil in the ditch.
5. Shake off the sand and soil in the bucket
Keep the stick in an approximately horizontal state and the bucket in the unloading position. If the sand and soil still
cannot fall, manipulate the bucket joystick left and right for several times to shake out the bucket. Avoid using the bucket
cylinder stroke to shake off the sand and soil by impact vibration at the end.
6. Precautions for the use of related parts
A. Precautions for the use of tracks
1) Excessive debris entering the tracks will increase the working strength of the tracks and cause damage.
2) Avoid making a sudden turn on a road with a strong friction.
3) Try to avoid getting saltwater or salty gas, as salt will corrode the track.
4) If the track will not be used for a long time, keep it in a cool and dry place.
5) When one track and the front device are jacked up, the other track cannot be used for walking, which will cause wear.
6) When walking, the track cannot be slack, otherwise, the track may fall off or be damaged.
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...