Komatsu PC88MR-10 Shop Manual page 89

10 Structure and function
EGR system piping drawing
Cools the exhaust gas.
The engine coolant is used for cooling.
Intake air connector
Returns the air from the air-cooled aftercooler and the exhaust gas from the EGR valve to the intake side.
Sensors
Control the EGR according to the operating condition.
Troubleshoot the system.
Control each part of the EGR circuit and control the EGR rate according to the operating condition to clean
the exhaust gas constantly.
Monitor the condition of the EGR circuit and perform troubleshooting to prevent a serious failure.
PC88MR-10 10-11