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Operation of working device
The working device will move quickly if you operate the working device joystick quickly; the working device will move
slowly if you operate the working device joystick slowly.
The working device is operated by the left and right pilot valves. The left control pilot valve operates the stick and rotation
(if a steering head is equipped, the left control pilot valve can also control the steering head to swing). The right working
device joystick operates the boom and bucket.
When the pilot valve handle or the bulldozing joystick is released, they will automatically return to the
neutral position and the working device or the bulldozer will stop.
If the pilot valve is operated within 15 seconds after turning off the engine, the working device can
also be dropped to the ground.
In addition, you can also operate the pilot valve to release the remaining pressure in the hydraulic oil circuit and lower the
boom after the machine is mounted on the trailer.
1. Stick control
Operate the left pilot valve, the stick extends when
pushing the pilot valve forward, and the stick retracts
when pulling the pilot valve backward.
2. Rotation control
Operate the left pilot valve, the platform will turn left when
it is tilted to the left, and the platform will turn right when it
is tilted to the right.
It is necessary to make sure that the machine is in the
rotating state before rotating.
3. Boom control
Operate the right pilot valve, lower the boom when
pushing the pilot valve forward, and raise it when pulling
the pilot valve backward.
Left working device joystick
Right working device joystick
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...