2-29
4. Release the internal pressure of the hydraulic system
The hydraulic oil in the hydraulic pipeline is at high temperature and high pressure when the
machine is working intermittently. When disassembling the oil port, oil may spray out, so
rotate the oil filler cap before removing the cap to release internal pressure.
1) If the attachment is not in the state as
shown in the figure, start the engine to run at
low speed, extend the bucket cylinder, and
retract the bucket arm cylinder. Then land
the bucket, place the dozer blade on the
ground, and turn off the engine.
2) Within 15 seconds after turning off the
engine, turn the start switch to the ON
position, and operate the joystick (working
device, walking) in each direction to release
the internal pressure.
5. Operation safety of accumulator
Warning: The accumulator is a component filled with high pressure nitrogen, which
may cause explosion and other hazards if used incorrectly. The accumulator
cannot be disassembled, and the operation such as drilling and welding also
cannot be carried out on it. Avoid the accumulator from being close to the fire
source, and avoid collision and impact on the accumulator. Professional personnel
shall be invited to dispose the accumulator.
The machine is equipped with accumulators
in the control pipeline. The accumulators in
the control pipeline are the pressure storage
devices. When these devices are installed,
the control pipeline can be operated for a
short time even after the engine stops.
By operating the joystick, the attachment can
be lowered under its own weight.
Pressure relief method for the control pipeline of the machine equipped
with accumulators
1) Lower the attachment to the ground, and then disable the hydraulic crushing hammer and
other accessories.
2) Turn off the engine.
3) Turn the start key to the ON position again to allow the current to flow in the circuit.
4) Adjust the safety lock control lever to the free position, and then operate the attachment
joystick and accessory control pedal (if equipped) in full travel forward, backward, left, and
right to release the pressure in the control pipeline.
5) Turn the safety lock joystick to the locked position to lock the control lever and accessory
control pedal.
High pressure
nitrogen hazard
Summary of Contents for U35
Page 5: ...1 1 1 Preface...
Page 15: ...2 1 2 Safety regulations...
Page 45: ...3 1 3 Introduction of components...
Page 70: ...4 1 4 Operation guide...
Page 90: ...4 21 6 After the engine shuts down reset the shutdown lever...
Page 104: ...5 1 5 Maintenance...
Page 147: ...6 1 6 Accessories guide...