Mitsubishi Evolution X. Manual - part 1295

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-131

REMOVAL SERVICE POINTS

.

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

CAUTION

As the compressor oil and receiver are highly moisture 
absorbent, use a non-porous material to plug the hose and 
nipples.
To prevent the entry of dust or other foreign bodies, plug the 
dismantled hoses and compressor nipples.

.

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

Take care not to spill any compressor oil when removing the 
compressor.

INSTALLATION SERVICE POINT

.

>>A<< A/C COMPRESSOR AND CLUTCH ASSEM-
BLY 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 = 80cm

2 

(2.7 fl.oz)

80 cm

3

 

− X cm

3

 = Y cm

3

 (2.7 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.

3. Tighten A/C compressor and clutch assembly mounting 

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

Tightening torque: 23 

± 6 N⋅ m

AC506759

AE

1

2

3

A/C compressor 
and clutch assembly

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-132

INSPECTION

M1552014303711

COMPRESSOR A/C 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 A/C compressor clutch 
should make a definite operating sound.

DISASSEMBLY AND ASSEMBLY

M1552004601328

Required Special Tools:

• MB991367: Special Spanner

• MB991386: Pin

AC506471

AC505743

2

1

3

4

5

6

7

8

9

11

16 ± 1 N·m
12 ± 1 ft-lb

10

AH

N

2.0 ± 0.2 N·m
18 ± 2 in-lb

2.0 ± 0.2 N·m
18 ± 2 in-lb

Cooling temperature switch 
disassembly steps 

1.

Bracket

2.

Snap ring

3.

Cooling temperature switch
A/C compressor clutch 
disassembly 

>>

D

<<

•

Air gap adjustment

<<

A

>>

>>

C

<<

4.

Self-locking nut

5.

Armature

6.

Shim

>>

B

<<

7.

Snap ring

8.

Rotor

9.

Snap ring

>>

A

<<

10. Field core
11. A/C compressor

A/C compressor clutch 
disassembly (Continued)

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-133

DISASSEMBLY SERVICE POINT

.

<<A>> SELF-LOCKING NUT REMOVAL

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.

.

AC507128AB

MB991386

MB991367

AC609150AB

Field core 
projection

Compressor
unit pin hole

AC001412

Snap ring

Rotor

Clutch coil

Tapered part

AD

COMPRESSOR ASSEMBLY AND TENSION PULLEY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-134

>>D<< AIR GAP ADJUSTMENT

Check whether or not the air gap of the clutch is within the stan-
dard value.

Standard value:

 0.3 

− 0.5 mm (0.012 − 0.020 inch)

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

M1552014303722

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 resistance 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.

AC507127AC

Thickness
gauge

Item

Temperature

Less than 2 ohms

Slightly below 155

° C (311° F)

No continuity

155

° C (311° F) or more

AC100787

Thermometer

Engine oil

AG

AC100810

Less than 2

Ω 

No continuity

125˚C 
(257˚F)

155˚C 
(311˚F)

OIL TEMPERATURE

AV