Komatsu PC500LC-10R Shop Manual page 117

10 STRUCTURE AND FUNCTION
FUNCTION OF ENGINE AUTOMATIC WARM-UP SYSTEM
• Engine automatic warm-up system is a system that warms up the engine by automatically increasing the
engine speed when the coolant temperature is low at starting the engine.
• Engine is protected from the damage caused by the low temperature by warming up.
Operating conditions (Operates when all of the follow-
ing conditions are satisfied)
Coolant temperature: Less than 30 °C
Engine speed: Max. 1250 rpm
Canceling conditions (Canceled when any of the fol-
lowing conditions is satisfied)
Auto- Coolant temperature: Min. 30 °C
matic
Warm-up operation time: 10 minutes or
opera-
more
tion
Manual
Fuel control dial: Held for 3 seconds at Min.
opera-
70 % of full speed (Max.)
tion
PC500LC-10R
↓
ENGINE AUTOMATIC WARM-UP SYSTEM
→
: Approx. rpmEngine speed
→
Engine speed: Any
Actuated
Canceled
10-23