Komatsu Galeo PC800-8 Shop Manual page 269

10 Structure, function and maintenance standard
1) Engine automatic warming-up function
• After the engine is started, if the engine coolant temperature is low, the engine speed is automatically raised
to warm up the engine.
2) Engine overheat prevention function
• This function protects the engine by lowering the pump load and engine speed to prevent overheating when
the engine coolant temperature has risen too high.
• This system is actuated at 95°C and above.
Operating condition
Coolant temperature:
Above 105°C
Operating condition
Coolant temperature:
Above 102°C
Operating condition
Hydraulic oil tempera-
ture: Above 95°C or
Coolant temperature:
Above 100°C
Operating condition
Hydraulic oil or coolant
temperature:
Above 95°C
PC800, 850-8
Operation/Remedy
⇒ Work mode: Any mode
Engine speed: Low idle
Monitor alarm lamp: Lights up
Alarm buzzer: Sounds
Operation/Remedy
Work mode: Any mode
⇒
Engine speed: Keep as is.
Monitor alarm lamp: Lights up.
Lower pump discharge.
Operation/Remedy
⇒
Work mode: Any mode
Engine speed: Keep as is.
Lower pump discharge.
Operation/Remedy
⇒
Work mode: Travel
Engine speed: Keep as is.
Lower travel speed.
Resetting condition
Coolant temperature: Below 105°C
⇒ Fuel control dial: Return to low idle
position once.
• Under above condition, controller
is set to condition before operation
of function. (Manual reset)
Resetting condition
Coolant temperature: Below 102°C
⇒
• Under above condition, controller
is set to condition before operation
of function. (Automatic reset)
Resetting condition
Coolant temperature: below 100°C
⇒ and hydraulic oil temperature: below
95°C
• Under above condition, controller
is set to condition before operation
of function. (Automatic reset)
Resetting condition
Coolant temperature below 95°C and
⇒
hydraulic oil temperature below 95°C
• Under above condition, controller
is set to condition before operation
of function. (Automatic reset)
SEN00386-03
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