Yuchai U35, Руководство оператора

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3. After the engine is started
A. Engine warm-up and machine heating
The normal working temperature of hydraulic oil is 50°C~80°C. Operating the hydraulic oil
below 20°C will damage the hydraulic components. So before starting work, if the oil
temperature is below 20 °C, the following preheating process must be followed.
1) Run the engine at a speed above idle speed 200rpm for 5 minutes.
2) Run the engine with the throttle in the center position for 5-10 minutes.
3) At this speed, extend and retract each cylinder several times, and gently operate the
slewing and traveling motors to preheat the cylinders. Only when the oil temperature
reaches 20 °C or above can it work. If necessary, the bucket cylinder can be extended or
retracted to the end of the stroke, and the hydraulic oil can be preheated at full load, but
each time it should not exceed 30 seconds. It can be repeated until the oil temperature
requirement is met.
B. Check after starting the engine
1) Check if all the indicator lights are off.
2) Check for oil leakage (lubricating oil, fuel) and water leakage.
3) Check if there is any abnormality in the sound, vibration, heating, smell, and instrument of
the machine. If an abnormality is found, repair immediately.
4. Turn off the engine
Attention: If the engine is suddenly shut down before cooling, its service life will be
greatly shortened. Therefore, do not suddenly shut down the engine except in
emergency situations.
If the engine is overheated, don't shut it down suddenly, but run at a medium speed
to gradually cool the engine, and then shut down the engine.
1) Run the engine at low idle for approximately 5 minutes to gradually cool down.
2) Push the throttle to the end, and pull the parking handle back to the end.
3) Turn the key switch to the OFF position and turn off the engine. All the indicators go off.
4) Take off the key.
5. Check after starting the engine
1) Regularly check the attachment, machine exterior and chassis, and check whether there
is water leakage or oil leakage. If an abnormality is found, repair it.
2) Refuel the fuel tank.
3)Check the engine compartment for paper scraps and debris. Remove paper scraps and
debris to avoid a fire.
4) Remove the mud attached to the chassis.