Komatsu PC500LC-10R Shop Manual page 431

30 TESTING AND ADJUSTING
3.
Install the sensor A2 of digital thermometer A to the plug
(1), and connect the meter A1 to it.
REMARK
Clamp the wiring harness of the digital thermometer so
that it does not touch a hot part during measurement.
4.
Set the engine coolant temperature and the hydraulic oil
temperature so that it is within the testing condition range.
5.
Measure the exhaust gas temperature.
• Procedure for measuring maximum value in trouble-
shooting
REMARK
• Measure the maximum exhaust temperature at the
time when actually operating the machine.
• Use the PEAK mode of the digital temperature
gauge.
• As the exhaust gas temperature differs greatly de-
pending on the outside air temperature (intake air
temperature of the engine), correct the value by
using the following formula if an abnormal value is
recorded.
Corrected value [ °C] = Measured value + 2 x (20 -
Ambient temperature)
• Procedure for measuring the exhaust gas temperature periodically for preventive maintenance services
(Pm clinic)
1)
Set the working mode to P ("Power Mode").
2)
Test the exhaust gas temperature when the oil pressure is relieved in arm IN circuit at the engine
high idle speed.
3)
Read the exhaust gas temperature when it has lowered and stabilized.
For standard values, see STANDARD VALUE TABLE, "STANDARD VALUE TABLE FOR EN-
GINE".
Remove the testing tools and restore the machine after the test is finished.
2
Plug (1):
Seizure prevention compound (LC-G)
3
Plug (1):
3.9 to 6.9 Nm {0.4 to 0.7 kgm}
PC500LC-10R
TEST EXHAUST GAS TEMPERATURE
30-25