Mitsubishi Lancer (4A9 engine). Manual - part 309

AC903375

MB992623

AB

Rotor

Threaded
shaft

MB990810

MD999566

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-117

CAUTION

• Be sure to use the guide (MB992623) when 

the side bearing puller (MB990810) is used to 
prevent the damage of A/C compressor.

• If the threaded shaft of side bearing puller 

(MB990810) is turned than necessary, the 
rotor may be distorted. Therefore, turn the 
threaded shaft lightly only by hand without 
using any tools.

Rotor can be removed by hand, but if it is difficult to 
remove it, use the guide (MB992623) and the side 
bearing puller (MB990810) as shown.

REASSEMBLY SERVICE POINTS

>>A<< A/C COMPRESSOR HIGH PRESSURE 
RELIEF VALVE INSTALLATION

CAUTION

Be careful not to damage the O-ring when install-
ing the high-pressure relief valve. Apply the 
specified refrigerating machine oil the high-pres-
sure relief valve mounting hole before installa-
tion

Check that O-ring is installed to the high-pressure 
relief and use the adjust torque wrench to install the 
high-pressure relief valve to the main body of the 
compressor.

>>B<< A/C COMPRESSOR COIL ATTACHMENT

AC709545AF

A/C compressor 
coil projection

Compressor
unit pin hole

Line up the pin hole on the compressor unit with the 
A/C compressor coil projection and attach.

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-118

>>C<< ROTOR INSTALLATION

CAUTION

If the outer wheel side of rotor is pushed, an 
abnormal noise can be generated because the 
inside of rotor is damaged, therefore, always 
push the inner wheel side.

AC902976

A/C compressor coil

MB992623

Rotor

MB992624

AC

AC902977

MB992623

MB992624

Rotor

A/C compressor
coil

AB

Install the rotor while pushing the inner wheel side 
slowly using the pusher (MB992624) and guide 
(MB992623).
NOTE: Insert the rotor in a direction perpendicular to 
the A/C compressor.

>>D<< SNAP RING INSTALLATION

AC209126AD

Snap ring

Rotor

A/C compressor coil

Tapered part

Using snap ring pliers, fit the snap ring so that the 
snap ring’s tapered part is on the outside.

>>E<< SELF-LOCKING NUT INSTALLATION

AC709546AC

MB991386

MB991367

Using a special tool, as when removing the nut, 
secure the armature and tighten the self-locking nut.

>>F<< AIR GAP ADJUSTMENT

AC707121

Thickness gauge

AE

Check whether or not the air gap of the clutch is 
within the standard value.

Standard value:

 0.25 

− 0.45 mm

NOTE: If there is a deviation of the air gap from the 
standard value, make the necessary adjustment by 
adjusting the number of shims.

INSPECTION

M1552004701217

COMPRESSOR ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-119

REFRIGERANT TEMPERATURE SWITCH 

CAUTION

Do not heat than necessary.

AC102063 AB

Thermometer

Engine oil

1. Immerse the refrigerant temperature sensor probe 

into engine oil to heat the sensor probe.

AC100810

Less than 2

No continuity

120˚C

135˚C

AZ

Oil temperature

2. If the oil temperature reaches the standard value, 

there should be continuity between the switch 
terminals.

Standard value: 

Switch status

Operating 
temperature 

°C

Being turned off (No 
continuity)

135

Being turned on { Continuity 
exists (2 

Ω or less)}

120

NOTE: When the oil temperature is 135

°

C or 

more and there is no continuity, the switch will not 
be turned on {Continuity exists (2 

Ω

 or less)} until 

the temperature reduces to 120

°

C or less.

CONDENSER ASSEMBLY

HEATER, AIR CONDITIONER AND VENTILATION

55A-120

CONDENSER ASSEMBLY

REMOVAL AND INSTALLATION

M1552015401577

Pre-removal and Post-installation Operation
• Discharging and Recharging refrigerant (Refer to )
• Air Cleaner Intake Duct Removal and Installation (Refer to 

GROUP 15 

− Air cleaner  <4A9>,  <4B1, 4J1>,   <4N1>).

• Headlamp support panel cover Removal and Installation 

(Refer to GROUP 51, Front bumper and radiator grille ).

• Hood latch Removal and Installation (Refer to GROUP 

42A 

− Hood ).

AC900345

3, 4

5

-Pipe coupling

A/C compressor oil: 
SUN PAG 56 or S10X

3

4

5

5

N

N

6

4.9 ± 0.9 N·m

4.9 ± 0.9 N·m

9.0 ± 2.0 N·m

9.0 ± 2.0 N·m

1

2

AB

Removal steps 

1.

Headlamp support upper panel 
(Refer to GROUP 42A 

− Loose 

panel )

2.

A/C pressure sensor connector

<<

A

>>

3.

Discharge flexible hose connection

<<

A

>>

4.

Liquid pipe A connection

5.

O-ring

6.

Condenser assembly

NOTE: Condenser fan removal and installation 
(Refer to GROUP 14 

−

 Radiator  <4A9>,  <4B1, 

4J1>,  <4N1>).

REMOVAL SERVICE POINT

<<A>> DISCHARGE FLEXIBLE HOSE/LIQUID 
PIPE A DISCONNECTION

CAUTION

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