Yuchai YC20SR, Руководство по эксплуатации

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D. Release the internal pressure of hydraulic system
Between machine operations, the hydraulic
oil in the hydraulic lines is at high
temperature and pressure. When the oil port
is open, oil may spurt out, so rotate the oil
filler cap to relieve the internal pressure
before removing the cap.
1)
If the working device is not in the condition shown, start the engine at low speed,
extend the bucket cylinder and retract the boom cylinder. Then drop the bucket to
the ground, place the dozer on the ground, and turn off the engine.
2) Within 15 seconds of shutting down the engine, turn the start switch to the ON
position and operate the lever in each direction (working device, travel, Swinging)
to relieve internal pressure.
E. Safe operation of the accumulator
WARNING:
The accumulator is a high-pressure nitrogen-filled component and
improper use may cause an explosion or other hazard. The
accumulator must not be disassembled, drilled, welded, etc. Keep the accumulator
away from fire, and avoid impact and shock on the accumulator. When disposing
of the accumulator, ask a professional to do so.
The machine is equipped with an
accumulator in the control line, which
is a pressure storage device that allows
the control line to be operated for a
short time even after the engine is
stopped.
By operating the joystick, the machine
can be lowered under its own weight.