Mitsubishi Galant (2004+). Manual - part 786

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-283

INSTALLATION SERVICE POINT

.

>>A<< COMPRESSOR 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 cm

3

 (X fl.oz) 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 = 140cm

2 

(4.7 fl.oz)

140 cm

3

 

− X cm

3

 = Y cm

3

 (4.7 fl.oz. 

− X fl.oz. = Y fl.oz)

NOTE: Y cm

3

 (Y fl.oz) indicates the amount of oil in the refrig-

erant line, the condenser, the evaporator, etc.
NOTE: When replacing the following parts at the same times as 
the compressor, subtract the rated oil amount of each part from 
Y cm

3

 (Y fl.oz) and discharge from the new compressor.

Quantity:

Evaporator: 60 cm

3

 (2.0 fl.oz)

Condenser: 15 cm

3

 (0.5 fl.oz)

Suction hose: 10 cm

3

 (0.3 fl.oz)

Receiver: 10 cm

3

 (0.3 fl.oz)

INSPECTION

M1552014301083

COMPRESSOR AIR CONDITIONING 
COMPRESSOR CLUTCH OPERATION CHECK

Connect the compressor connector terminal to the battery posi-
tive (+) terminal and ground the battery’s negative (-) terminal 
to the compressor unit. At that time, the air conditioning com-
pressor clutch should make a definite operating sound.

AC206292AB

A/C COMPRESSOR 
CLUTCH 
CONNECTOR

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-284

DISASSEMBLY AND ASSEMBLY

M1552004600466

Required Special Tools:

• MB991367: Special Spanner

• MB991386: Pin

DISASSEMBLY SERVICE POINT

.

<<A>> SELF-LOCKING NUT REMOVAL

AC209643AB

2

1

10

9

8

7

6

5

4

N

16 ± 1 N·m
12 ± 1 ft-lb

3

COOLING TEMPERATURE 
SWITCH DISASSEMBLY STEPS

1.

SNAP RING

2.

COOLING TEMPERATURE 
SWITCH
AIR CONDITIONING 
COMPRESSOR CLUTCH 
DISASSEMBLY

>>D<<

•

AIR GAP ADJUSTMENT

<<A>>

>>C<<

3.

SELF-LOCKING NUT

4.

ARMATURE

5.

SHIM

>>B<<

6.

SNAP RING

7.

ROTOR

8.

SNAP RING

>>A<<

9.

FIELD CORE

10. A/C COMPRESSOR

AIR CONDITIONING 
COMPRESSOR CLUTCH 
DISASSEMBLY (Continued)

AC209645AB

MB991386

MB991367

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-285

ASSEMBLY SERVICE POINTS

.

>>A<< FIELD CORE ATTACHMENT
Line up the pin hole on the compressor unit with the field core 
projection and attach.

.

>>B<< SNAP RING INSTALLATION
Using snap ring pliers, fit the snap ring so that the snap ring’s 
tapered part is on the outside.

.

>>C<< SELF-LOCKING NUT INSTALLATION
Using a special tool, as when removing the nut, secure the 
armature and tighten the self-locking nut.

.

>>D<< AIR GAP ADJUSTMENT
Apply voltage from the battery to the air conditioning compres-
sor clutch and check that the clutch air gap is inside the stan-
dard value. If outside the standard value, use a shim to adjust 
the gap.

Standard value:

 0.3 

− 0.5 mm (0.012 − 0.020 inch)

AC209648AB

FIELD CORE 
PROJECTION

COMPRESSOR
UNIT PIN HOLE

AC001412

SNAP RING

ROTOR

CLUTCH COIL

TAPERED PART

AB

AC209650AB

THICKNESS
GAUGE

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-286

INSPECTION

M1552014301094

COOLING TEMPRATURE SWITCH

CAUTION

Do not heat more than necessary.
1. Dip the metal part of the cooling temperature switch into 

engine oil and increase the oil temperature using a gas 
burner or similar.

2. When the oil temperature reaches the standard value, check 

that voltage is supplied between the terminals.

Standard value: 

NOTE: When the oil temperature is 155

°

C (311

°

F) or more 

and there is no continuity, the resistance will not be 2

Ω

 or 

lower until the oil temperature reduces to 125

°

C (257

°

F) or 

less.

ITEM

TEMPERATURE

Less than 2 ohms

Slightly below 155

°C (311°F)

No continuity

155

°C (311°F) or more

AC100787

THERMOMETER

ENGINE OIL

AB

AC100810

LESS THAN 2

Ω 

NO CONTINUITY

125˚C 
(257˚F)

155˚C 
(311˚F)

OIL TEMPRATURE

AE