Doosan DX140LC, Operation And Maintenance Manual

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OP000598
3-5
Operation
8. After warming unit, check all operating indicators to make
sure that all engine systems (oil pressure, coolant, etc.) are
in the normal operating range. If any problems are noticed,
shut down engine. Normal indicators are:
9. Check color of exhaust smoke.
• No color or light blue - Engine is running in good
condition.
• Black - Incomplete combustion. Check cause.
• White or dark blue - Engine is burning engine oil.
Check cause.
10. Check for usual engine vibration and noises. If any are
heard or felt, investigate cause.
NOTE: If engine coolant temperature gauge pointer
moves into the red zone, the engine coolant
temperature warning light will turn "ON," a
warning buzzer will sound, and the engine
speed will be automatically reduced. Allow the
engine to run at low idle speed until the
temperature gauge registers in the blue zone
again. When the blue zone is reached, allow the
engine to idle for an additional three - five
minutes before shutting down the engine. If not
allowed to idle, heat surge may develop which
will damage the engine. Allowing the engine to
idle will dissipate heat. Check the coolant level,
look for a loose fan belt, inspect for debris
around radiator, and so on.
02/05 [MO] 11:30
E/G SPEED
1700
RPM
FG000092
4 5 6 7
2
3
1
CHECK
Figure 6
No. INSTRUMENT PANEL LIGHT OR GAUGE
INDICATOR
READING
1 Engine Coolant Temperature Gauge Blue Range
2 Fuel Gauge Blue Range
3 Hydraulic Oil Temperature Gauge Blue Range
4 Charging Warning Light OFF
5 Engine Oil Pressure Warning Light OFF
6 Engine Coolant Temperature Warning Light OFF
7 Engine Check Warning Light OFF