Komatsu PC500LC-10R, Shop Manual

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ENGINE AND COOLING SYSTEM
TEST ENGINE SPEED
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Place the machine on a level ground, and then lower the work equipment completely to the ground in
a stable posture. Set the lock lever to LOCK position, and then stop the engine.
Check this item with Pre-defined Monitoring or Monitoring function of the machine monitor.
Check this item under the following conditions.
• Engine coolant Temperature: 60 to 100 °C
• Hydraulic oil temperature: 45 to 55 °C
For testing the engine speed to perform troubleshooting, refer to this section.
METHOD FOR TESTING ENGINE SPEED
Testing the engine speed at high idle
1.
Start the engine.
2.
Select “Pre-defined Monitoring” (01/11) or “Monitoring Se-
lection Menu” and display the following monitoring items
by referring to “SET AND OPERATE MACHINE MONI-
TOR”.
Monitoring code: 01002 “Engine Speed”
3.
Set the engine coolant temperature and the hydraulic oil
temperature so that it is within the testing condition range.
4.
Set the working mode to P (“Power Mode”).
5.
Turn off the auto-deceleration.
6.
Turn the swing lock switch to ON position.
7.
Turn the fuel control dial to MAX (High idle) position.
8.
Check the engine speed when all control levers and control pedals are in NEUTRAL position.
For standard values, see STANDARD VALUE TABLE, “STANDARD VALUE TABLE FOR ENGINE”.
Testing the engine speed at low idle
1.
Start the engine.
2.
Select “Pre-defined Monitoring” (01/11) or “Monitoring Se-
lection Menu” and display the following monitoring items
by referring to “SET AND OPERATE MACHINE MONI-
TOR”.
Monitoring code: 01002 “Engine Speed”
3.
Set the engine coolant temperature and the hydraulic oil
temperature so that it is within the testing condition range.
4.
Turn the fuel control dial to MIN (Low idle) position.
5.
Check the engine speed when all control levers and con-
trol pedals are in NEUTRAL position.
For standard values, see STANDARD VALUE TABLE, “STANDARD VALUE TABLE FOR ENGINE”.
Engine speed when the oil pressure of 2-pumps are relieved
1.
Start the engine.
TEST ENGINE SPEED 30 TESTING AND ADJUSTING
30-18 PC500LC-10R