LiuGong CLG835H, Service Manual

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5-11
January 24, 2017 Removal and Installation
CLG835H Introduction of air conditioner system main parts
Removal and Installation
Introduction of air conditioner
system main parts
1. Compressor
The compressor is a core component of the air
conditioning system. It is used to compress low-
temperature and low-pressure refrigerant vapor
into high-temperature and high-pressure refriger-
ant vapor. The compressor used for the system
is a swash plate one. Model: 10P17, displace-
ment: 178cm³, and refrigerant oil brand: PAG46.
2. Evaporator
The evaporator is used to allow throttled low-
temperature and low-pressure refrigerant to
absorb large heat from the surrounding air during
evaporation therein, so as to realize the purpose
of cooling or dehumidification in the vehicle. The
evaporator of air conditioning system is a double
laminated type evaporator.
3. Receiver dryer
The receiver drier is a unit as required to ensure
the normal operation of compressor and refriger-
ating system. Its functions includes: 1. storage,
2. filtration, 3. drying.
4. Condenser
The condenser is a heat-exchange unit which
absorbs the heat of high-pressure overheated
refrigerant vapor from the compressor, con-
denses into liquid type for over cool heat
exchanger. The air conditioner of the vehicle
adopts parallel-flow type condenser and others.
5. Expansion valve
The expansion valve is a throttling unit, used for
throttling and step-down as well as flow adjust-
ment; meanwhile, it can also prevent wet com-
pression, liquid impact and abnormal
overheating. The air conditioning of this machine
adopts the H-type thermal expansion valve.
6. A/C pipe
The connection lines of air conditioning system
include high-pressure pipes and low-pressure
pipes. Among them, compressor-to-condenser
hose and reservoir-to-evaporator hose are high
pressure hoses, and evaporator-to-compressor
hose is low pressure hose.
7. Pressure switch
The engagement and disengagement of com-
pressor clutch are controlled by pressure of pres-
sure switch monitoring system to realize the
purpose of protecting refrigerating system. A
high/low-pressure combination switch is used in
this system, the upper limit value of high pres-
sure is 3.14 Mpa, and the lower limit value of low
pressure is 0.196 Mpa.
8. A/C control panel
It has the action of controlling the ventilation, air
change, refrigeration, heating, defrosting and
other functions of air conditioning system. Auto-
matically switch on/off air conditioner or heater
through internal control program so as to main-
tain temperature inside cab to be around setting
temperature.