Mitsubishi Lancer (4A9 engine). Manual - part 307

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-109

COMPRESSOR ASSEMBLY

REMOVAL AND INSTALLATION <1600 (M/
T)>

M1552004403580

CAUTION

•

Pre-removal operation
• Discharging refrigerant (Refer to )

• Engine room under cover front A and B, Engine room side 

cover removal (Refer to GROUP 51, Under Cover ).

• Drive belt removal (Refer to GROUP 11A Crankshaft Pul-

ley ) 

Post-installation Operation
• Drive belt installation (Refer to GROUP 11A Crankshaft 

Pulley ) 

• Drive belt tension check and adjustment (Refer to 

GROUP 11A 

− Drive Belt Tension Check ). <Petrol 

engine>

• Charging refrigerant (Refer to )

• Engine room under cover front A and B, Engine room side 

cover installation (Refer to GROUP 51, Under Cover ).

ACB01639

1, 2

3

5

3

1

2

4

AB

3

N

N

10 ± 2 N·m

10 ± 2 N·m

23 ± 6 N·m

A/C compressor oil: 
SUN PAG 56 or S10X

-Pipe coupling

23 ± 6 N·m

Removal steps 

<<

A

>>

1.

Discharge flexible hose connection

<<

A

>>

2.

Suction flexible hose connection

3.

O-ring

<<

B

>>

>>

A

<<

4.

A/C compressor and clutch 
assembly

5.

A/C compressor bracket

When removing the compressor, be careful not to subject the pulley and the clutch to impact.

NOTE: The service points which are not described 
are the same as before.

REMOVAL SERVICE POINTS

<<A>> DISCHARGE FLEXIBLE HOSE/SUCTION 
FLEXIBLE HOSE DISCONNECTION

CAUTION

Use the plug which is not breathable because A/
C compressor oil or receiver have high hygro-
scopicity.
Plug the hose nipple removed to prevent the entry of 
dust and dirt.

<<B>> A/C COMPRESSOR AND CLUTCH 
ASSEMBLY REMOVAL
Be careful not to spill the A/C compressor oil and 
remove the A/C compressor.

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-110

INSTALLATION SERVICE POINT

>>A<< A/C COMPRESSOR AND CLUTCH 
ASSEMBLY INSTALLATION
If a new compressor is installed, first adjust the 
amount of oil according to the procedures described 
below, and then install the compressor.
1. Measure the amount X mL of oil within the 

removed compressor.

2. Drain (from the new compressor) the amount of 

oil calculated according to the following formula, 
and then install the new compressor.
New compressor oil amount = 60mL

60 mL 

− X mL = Y mL

NOTE: Y mL indicates the amount of oil in the refrig-
erant line, the condenser, the evaporator, etc.

AC711141AD

1

2

3

A/C compressor and 
clutch assembly

3. Tighten A/C compressor assembly mounting bolts 

to the specified torque in the order of number 
shown in the figure.

Tightening torque: 23 

± 6 N⋅m

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-111

REMOVAL AND INSTALLATION <Except 
1600 (M/T) >

M1552004403568

CAUTION

•

Pre-removal operation
• Discharging refrigerant (Refer to )
• Engine room under cover front A and B, Engine room side 

cover removal (Refer to GROUP 51, Under Cover ).

• Drive belt removal (Refer to GROUP 11A Crankshaft Pul-

ley ) <Petrol engine>

• Drive belt removal (Refer to GROUP 11C, Crankshaft Pul-

ley ) <Diesel engine>

Post-installation Operation
• Drive belt installation (Refer to GROUP 11A Crankshaft 

Pulley ) <Petrol engine>

• Drive belt installation (Refer to GROUP 11C Crankshaft 

Pulley ) <Diesel engine>

• Drive belt tension check and adjustment (Refer to 

GROUP 11A 

− Drive Belt Tension Check ). <Petrol 

engine>

• Drive belt tension check and adjustment (Refer to 

GROUP 11C 

− Drive Belt Tension Check ). <Diesel 

engine>

• Charging refrigerant (Refer to )

• Engine room under cover front A and B, Engine room side 

cover installation (Refer to GROUP 51, Under Cover ).

ACB01836

1, 2

3

A/C compressor oil: 
SUN PAG 56 or S10X

-Pipe coupling

5

*1

5

*2

NOTE:
*1: <1800>
*2: <1800 (Petrol), 2000>

23 ± 6 N·m

23 ± 6 N·m

23 ± 6 N·m

3

1

2

4

AC

3

N

N

10 ± 2 N·m

10 ± 2 N·m

23 ± 6 N·m

Removal steps 

<<

A

>>

1.

Discharge flexible hose connection

<<

A

>>

2.

Suction flexible hose connection

3.

O-ring

<<

B

>>

>>

A

<<

4.

A/C compressor and clutch 
assembly

5.

A/C compressor bracket <Petrol>

When removing the compressor, be careful not to subject the pulley and the clutch to impact.

NOTE: The service points which are not described 
are the same as before.

REMOVAL SERVICE POINTS

<<A>> DISCHARGE FLEXIBLE HOSE/SUCTION 
FLEXIBLE HOSE DISCONNECTION

CAUTION

Use the plug which is not breathable because A/
C compressor oil or receiver have high hygro-
scopicity.
Plug the hose nipple removed to prevent the entry of 
dust and dirt.

<<B>> A/C COMPRESSOR AND CLUTCH 
ASSEMBLY REMOVAL

Be careful not to spill the A/C compressor oil and 
remove the A/C compressor.

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-112

INSTALLATION SERVICE POINT

>>A<< A/C COMPRESSOR AND CLUTCH 
ASSEMBLY INSTALLATION
If a new compressor is installed, first adjust the 
amount of oil according to the procedures described 
below, and then install the compressor.
1. Measure the amount X mL of oil within the 

removed compressor.

2. Drain (from the new compressor) the amount of 

oil calculated according to the following formula, 
and then install the new compressor.
New compressor oil amount = 70mL

70 mL 

− X mL = Y mL

NOTE: Y mL indicates the amount of oil in the refrig-
erant line, the condenser, the evaporator, etc.

AC711141AD

1

2

3

A/C compressor and 
clutch assembly

3. Tighten A/C compressor assembly mounting bolts 

to the specified torque in the order of number 
shown in the figure.

Tightening torque: 23 

± 6 N⋅m

INSPECTION

M1552004501451

CHECK THE MAGNETIC CLUTCH FOR A/
C COMPRESSOR

ACB02033AB

<1600 (M/T)>

AC809068

<Except 1600 (M/T) >

AH

Connect the connector battery to positive battery ter-
minal in the A/C compressor, and then earth the bat-
tery (

−) terminal to the A/C compressor itself. At this 

time, check that the magnetic clutch operating sound 
can be heard.