Great Wall Florid. Manual — part 53

GWFLORID Maintenance Manual

210

Electromagnetic Clutch

Clutch composition

Electromagnetic clutch consists of an armature, a solenoid,

and a pulley.

Areas of importance during clutch usage

Because the joint of the electromagnetic clutch

operates under high speeds, separation-joint marks on

the pulley and armature are completely normal, and do

not harm clutch usage.

The clutch's operating voltage must be consistent with

the specified voltage rating. Too high or too low will

affect its normal usage.

The clearance between the coil and the pulley is

very important. If too big, the effect of the magnetic

field reduces. If too small, the high speed pulley rubs

against the fixed coil, causing the clutch to burn.

The clearance between the armature and the pulley

is also very important. If too big, it leads to insufficient

clutch pull-in force. If too small, it may cause armature

damage.

Clutch removal

1. Seize the clutch's triangular piece and secure the

clutch's armature with a clamp. Then take down the

inner hexagon lock screws of the main shaft with an

inner hexagon spanner.

2. After removing the lock screws, manually grasp the

triangular piece and take out the armature, at the same

time remove the clamp spring with the circlip pliers.

3. Remove the clutch's pulley with pullers as shown, and

remove the compressor pulley and its bearing.

4. The gasket on the main shaft is used to adjust the

clearance between the pulley and the armature. Use it

to adjust the clearance value to be as specified during

installation, and do not lose it during removal.

5. Remove the mounting screw from the solenoid coil

connector with a screwdriver, and use circlip pliers to

take down the retaining ring inside the coil and remove

the solenoid coil.

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

GWFLORID Maintenance Manual

212

High pressure

side pressure

(MPa)

Appropriate

pressure

Appropriate

charge

Excessive

charge

Refrigerant charge (g)

5. When charging the refrigerant, carefully observe the

high pressure side of the manifold pressure gauge as

well as the refrigerant's rate of flow (limpid, foamy, hazy)

which can all be seen from the inspection window. Use

this window to determine the appropriate time to stop

charging the refrigerant (by closing the low pressure

valve).

When the compressor is operating, please do not close the

high pressure valve.

Before inspecting the cooling level, confirm the regulated

refrigerant charge quantity for the air conditioning system.

Determine the charge amount for the refrigerant charge.

Please carry out the setup according to the following

working conditions.

Engine's water tank temperature: steady

Engine speed: normal idle

A/C switch: ON

Blower speed control switch: highest gear

Temperature controller: inner circulation

Door: completely open

Window: completely open

Filling Quantity and Method for Refrigerant Oil

First vacuum the refrigerant system to 0.2 × 10

-5

Pa, then fill it with model number RS20 refrigerant. The steps

are as follows:

1. Close the high pressure, manually operated valve and the auxiliary valve.

2. Remove the high pressure side's hose from the manifold pressure gauge and insert it into the oil cup.

3. Open the auxiliary valve and draw the refrigerant from the oil cup to the refrigeration system.

4. When refrigerant in the oil cup is about to be fully vacuumed, immediately close the auxiliary valve, in

order to avoid sucking air into the system.

5. Screw the high pressure side hose connector onto the manifold pressure gauge, start the vacuum

pump and open the high pressure, manually operated valve, then open the auxiliary valve to vacuum

the system until it reaches 0.2 × 10

-5

Pa, and continue to vacuum for 15 minutes to exhaust the air

which is entering the system following the oil.

Caution: When replacing an old compressor with a new one, be sure to bleed out some oil in order to

level off the new and the old compressor's oil level, and to avoid an excessive oil amount influencing

the cooling effect. When using an old or repaired compressor, be sure to keep the refrigerant inside

the compressor the same level as the one that is being replaced.

Daily Maintenance of the Air Conditioning System

In order to guarantee the air conditioning system's normal operation, regular maintenance should be performed.

Daily maintenance for the air conditioning system is as follows:

1. Inspect and clean the air conditioning system's condenser. The cooling fin's insides need to be

cleaned, with no blockage in between. After driving in the rain or on a muddy road, check the

condenser fan for silt or rocks. If any are found, immediately clean them up.

2. Inspect the refrigeration system's refrigerant amount: When the air conditioning unit is operating

normally, observe the oil check glass. Under normal conditions, the oil check glass should have no air

bubbles.

3. Inspect the drive belt. The belt between the compressor and the decoration cover should be tight.

4. Check the air conditioning system to make sure there is no irregular noise or unusual odors.

5. Check the compressor's inlet and exhaust port areas to make sure the temperature is normal.

6. Check to make sure the appearance of the refrigeration system's hose is correct and that all the

connections are firm.

7. Inspect if the refrigeration system's pipelines run into other components, and any traces of leaking oil

at each connection.

8. Check and make sure the refrigeration system's circuit connector is firm, and any sign of circuit

disconnection.

9. Inspect if the compressor's fastening bolts are sturdy, reliable or flawed.

the refrigerant into the refrigeration system in the gas

form), and open the manifold pressure gauge's low

pressure valve.

213

Airbags

Airbags

Airbag Electronic Control Unit . . . . . . . . . . ..214
Diagnostic Scanner . . . . . . . . . . . . . . ..215
Troubleshooting . . . . . . . . . . . . . . . . 216
Vehicle Collision Diagnostics . . . . . . . . . . . 226
Removal Method for Individual Components. . . . . 227
Driver Side Airbag Module (DAB), Front Passenger Side
Airbag Module (PAB), Clock Spring, and Steering Wheel . 228
Airbag Module Disposal. . . . . . . . . . . . . 230
Airbag’s Diagnostic Methods Without a
Diagnostic Scanner . . . . . . . . . . . . . . ..232