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January 24, 2017
Structure Function Principle
CLG835H
DEF pipeline assembly
Part Structure and Principle Introduction
The function of DEF tank is to store DEF solution and provide DEF for DPF (Diesel Particle Filter) during
the machine operates. DEF tank consists of shell, multi-functional head unit and cover. There are three
sensors in the multi-functional head unit: temperature sensor, liquid level sensor and quality sensor.
Temperature sensor detects DEF solution temperature and transports signal to ECM, when DEF temper-
ature is less than -8°C, the solenoid water valve is opened, and engine coolant enters into def tank to
prevent DEF solution from freezing, however, when DEF temperature exceeds 5°C, the solenoid water
valve is closed to block coolant entering and prevent DEF solution from being excessively heated. Fuel
level sensor detects the surplus of DEF solution and transports signal to ECM, if DEF fuel lever is less
than alarm value, the situation will trigger low fuel lever alarm and remind the operator of adding DEF.
Mass sensor detects DEF mass, if user wrong adds other oils or water,or the concentration of DEF solu-
tion is unqualified, these situations will lead to alarm and remind the operator of adding DEF.
1. Multifunction DEF Header Unit
2. Tank
3. Drain Plug
4. Fill Cap
5. Fill Port Adapter
P18P00042
Multifunction DEF Header Unit
Fill Cap
Fill Port Adapter
Tank
1
2
3
4
5
Summary of Contents for CLG835H
Page 2: ......
Page 4: ...Contents January 24 2017 CLG835H...
Page 6: ...1 2 General Information January 24 2017 CLG835H...
Page 38: ...1 34 Machine Inspection Table January 24 2017 CLG835H...
Page 156: ...3 2 Power Train System January 24 2017 CLG835H...
Page 214: ...3 2 Power Train System January 24 2017 CLG835H...
Page 272: ...3 60 Testing and adjustment January 24 2017 Power Train Test CLG835H...
Page 276: ...4 4 Hydraulic System January 24 2017 CLG835H...
Page 552: ...6 2 Driver s Cab System January 24 2017 CLG835H...
Page 608: ...7 2 Structure January 24 2017 CLG835H...
Page 662: ...8 4 Electrical System January 24 2017 CLG835H...
Page 677: ...8 19 January 24 2017 Structure Function Principle CLG835H Power System P18E00014...
