Komatsu ecot3 PC300LC-8 Shop Manual page 282

SEN01998-05
1) Auto-warm-up function
q After the engine is started, if the engine coolant temperature is low, the engine speed is raised auto-
matically to warm up the engine.
Operating condition (All)
Coolant temperature: Below 30°C.
Engine speed: Max. 1,200 rpm
Resetting condition (Any one)
Coolant temperature: Above 30°C
Auto
Auto-warm-up operation time: Min. 10 minutes
Fuel control dial: Kept at 70% of full level for 3
Manual
sec. or longer
2) Overheat prevention function
q If the engine coolant temperature rises too high during work, the pump load and engine speed are
reduced to protect the engine from overheating.
q This function is turned on when the coolant temperature rises above 95°C.
Operating condition
Hydraulic oil tempera-
ture: Above 95°C
Operating condition
Hydraulic oil or cool-
ant temperature:
Above 100°C
Operating condition
Hydraulic oil or cool-
ant temperature:
Above 102°C
Operating condition
Hydraulic oil or cool-
ant temperature:
Above 105°C
24
⇓
Operation/Remedy
⇒
Work mode: Travel
Engine speed: Keep as is.
Lower travel speed.
Operation/Remedy
⇒
Work mode: P or E mode
Engine speed: Keep as is.
Lower pump discharge.
Operation/Remedy
⇒
Work mode: P, E, B or L mode
Engine speed: Keep as is.
Monitor alarm lamp: Lights up.
Lower pump discharge.
Operation/Remedy
⇒
Work mode: Any mode
Engine speed: Low idle
Monitor alarm lamp: Lights up
Alarm buzzer: Sounds
10 Structure, function and maintenance standard
⇒
Engine speed: Max. 1,200 rpm
⇒
Engine speed: Any level
Hydraulic oil temperature: Below
⇒
95°C
• Under above condition, controller
is set to condition before opera-
tion of function. (Automatic reset)
Hydraulic oil or coolant tempera-
⇒
ture: Below 100°C
• Under above condition, controller
is set to condition before opera-
tion of function. (Automatic reset)
Hydraulic oil or coolant tempera-
⇒
ture: Below 102°C
• Under above condition, controller
is set to condition before opera-
tion of function. (Automatic reset)
Hydraulic oil or coolant tempera-
ture: Below 105°C
⇒
Fuel control dial: Return to low idle
position once.
• Under above condition, controller
is set to condition before opera-
tion of function. (Manual reset)
Operated
Reset
Resetting condition
Resetting condition
Resetting condition
Resetting condition
PC300, 350-8