Great Wall Florid, Service Manual

Page: 218 / 281

211 Air Conditioning System
Clutch Installation
1. Install the solenoid coil at the place pressing up against the head cover's end surface and pay atten-
tion to insert the dowel pin of the solenoid coil into the bottom hole of the head cover. Put the retaining
ring into the groove with circlip pliers, and press the solenoid coil's connecting wire onto the pressing
line plate on the head cover with a SST.
2. Put the compressor on a specially designed fixture or platform, with its head cover facing upwards.
Press the pulley into the head cover shaft, and put the pulley bearing's retaining ring into the groove
with circlip pliers.
3. Install the armature onto the main shaft's spline and seize the clutch's triangular piece with a clamp.
Then tighten the inner hexagon lock screws and washers with a torque wrench. Screw torque should
be between 150-180 N·m. After installation is done, make sure to check if the clutch's pulley and
armature are able to operate freely, and also check the clearance between the pulley and armature,
which should be 0.3-0.6 mm.
Vacuuming and Charging Refrigerant
Initiate vacuum pumping by using the manifold pressure
gauge connected to the air conditioner (compressor) pipeline
and vacuum pump. When the vacuum pumping starts, open
the manifold pressure gauge's high and low pressure valve,
and open the vacuum pump's end surface valve (if equipped),
then press the "ON" button to start the vacuum pump, and let it
run for at least 20 minutes. When the manifold pressure gauge
shows -760 mmHg or lower, close the high and low pressure
valve, and press the switch to turn off the vacuum pump.
Low pressure
gauge
High pressure
gauge
Manifold gauge
Yellow
Blue Yellow Red
Air purge
Blue
Yellow
Red
Close
Refrigerant tank
Refrigerant tank
Blue
Red
Yellow
Low pressure
High pressure
Open
Open
Quick coupler
Red
Manifold gauge
Low pressure
pipe
Quick coupler
High pressure pipe
Vacuum pump
Low pressure
High pressure
Blue
Inspect air tightness
After shutting off the vacuum pump, continue to inspect
the pressure reading of the manifold pressure gauge. If the
pressure reading remains unchanged for 20 minutes after
the vacuum pump stops operating, the refrigeration system
is proven to have no leak. One may continue to the next
step. If the reading changes, the system has a leak. Carry out
an inspection, and after repairing the leaking section, start
vacuum pumping once more.
Charge refrigerant
After verifying the system's air tightness, connect the
refrigerant tank (or gas cylinder) and yellow air supply hose
head. Connect the yellow air supply hose's other head with
the injection port in the middle of the manifold pressure
gauge. Ensure the refrigerant tank and air supply hose's nut
is tightly connected, then open the refrigerant tank's valve.
At this time, the high and low pressure valve is closed. Use
a tip shaped screwdriver or similar instrument and press
the valve core at the side port for 1-2 s, then expel the air
between the air supply hose and manifold gauge.
Perform switch operations according to the
following methods
1. Switch the front and rear blower speed control switch
to the highest settings, and rotate the temperature
control switch to the coldest position.
2. Press down the A/C switch, and set inner/outer circula-
tion to inner circulation mode. Open the doors and win-
dows during this procedure.
3. Adjust the engine's speed to the regulated idle speed.
4. Hold up the refrigerant tank or gas cylinder (emptying