Doosan DX190W, Operation And Maintenance Manual

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OP000529
3-6
Operation
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.
Cold Weather Starting
1. Perform all steps in "Operational Checks Before Starting
Engine."
2. Set engine speed control dial slightly above "LOW IDLE"
(Figure 10).
3. Sound horn.
WARNING!
DO NOT USE STARTING FLUIDS. The preheat system could
cause the starting fluid to explode. Starting fluids should
never be used.
HAOB34L
Figure 10