![background image](http://html2.mh-extra.com/html/yuchai/u27/u27_instruction-manual_4668501058.webp)
4-4
2. Start the engine
Warning: When a warning sign prohibiting engine starting is hung on the control handle, it
is not allowed to start the engine.
Warning: Before starting the engine, you must confirm that the safety lock handle is in the
locked position to prevent accidental contact with the joystick during starting, which may
cause sudden movements of the working device and cause an accident.
Warning: You should preheat the machine when starting the engine in cold weather. If the
machine is not thoroughly preheated before operating the joystick, it will be slow to
respond, which will lead to accidents.
Warning: If the battery electrolyte freezes, do not charge the battery and do not start the
engine by using a different power source. Doing so will cause the battery to catch fire.
Before the battery is charged or the engine is started by using a different power source,
the battery electrolyte must be dissolved. Before starting, check whether the battery
electrolyte is frozen or leaking.
Before starting the engine, insert the key into the start switch and when it is turned to the ON position, check the display
status of all the indicator and alarm lights on the digital combination instrument. If there is an alarm, please perform
related troubleshooting first before starting the engine.
A. Start the engine at normal temperature
Turn the key clockwise to the ON position when the ambient temperature is above 5 degrees. The alarm indicator goes
out to indicate that the machine can start normally. Continue to turn to the START position and keep it at this position for
no more than 15 seconds. After the engine starts, release the key to make it automatically return to the ON position. If the
engine fails to start, it will restart after 30 seconds.
B. Start the engine in cold temperature
Turn the key counterclockwise to the
HEAT
position for preheating when the ambient temperature is below 5
℃
. The
preheating is completed after about 6 seconds, the preheating indicator is off, and then turn the key clockwise to the
START position to start the engine.
Note: the preheating time shall not exceed 30 seconds.
Note: The continuous starting time should not exceed 15 seconds; the interval between two starts
should not be less than 30 seconds; if the engine cannot be started three times in a row, check
whether the engine systems are normal.
Warning: 1) Do not turn the key while the engine is running. Because it will damage the
engine at this time.
2) When dragging the excavator, do not start the engine.
3) Do not start the engine by short-circuiting the starter motor circuit.
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...