Mitsubishi Grandis. Manual - part 647

CHARGING SYSTEM

ENGINE ELECTRICAL

16-12

ALTERNATOR ASSEMBLY

REMOVAL AND INSTALLATION

M1161001400742

REMOVAL SERVICE POINT
<<A>> ALTERNATOR ASSEMBLY 
REMOVAL

Remove the alternator assembly from above the 
vehicle.

Pre-removal Operation
Drive Belt Removal (Refer to GROUP 11A, Crankshaft 
Pulley 

P.11A-15

).

Post-installation Operation
• Drive Belt Installation (Refer to GROUP 11A, Crankshaft 

Pulley 

P.11A-15

).

• Drive Belt Tension Check (Refer to GROUP 11A, 

On-vehicle Service 

P.11A-7

).

AC313042

11 ± 1 N·m

11 ± 1 N·m

14 ± 3 N·m

1

6

5

3

7

4

9

8

10

AB

44 ± 10 N·m

49 ± 9 N·m

49 ± 9 N·m

2

49 ± 9 N·m

Removal steps

1.

Oxygen sensor connector

2.

Oxygen sensor connector clamp

3.

A/C compressor assembly 
connector

4.

A/C compressor assembly 
connector clamp

5.

Alternator connector

6.

Alternator terminal

7.

Connector bracket

8.

Harness clamp

<<A>>

9.

Alternator assembly

•

Timing belt lower cover  (Refer to 
GROUP 11A, Timing Belt 

P.11A-33

).

10. Alternator mounting bracket

Removal steps (Continued)

CHARGING SYSTEM

ENGINE ELECTRICAL

16-13

 DISASSEMBLY AND REASSEMBLY

M1161001600207

DISASSEMBLY SERVICE POINTS
<<A>> FRONT BRACKET ASSEMBLY 
REMOVAL

AK301524AD

1

2

3

4

5

6

7

8

9

10

11

12

13

14

4.4 ± 1.0 N·m

118± 19 N·m

3.7 ± 0.7 N·m

Disassembly steps

<<A>>

1. Front bracket assembly

<<B>>

2. Alternator pulley

>>B<<

3. Rotor
4. Rear bearing
5. Bearing retainer
6. Front bearing
7. Front bracket

<<C>>

8. Stator
9. Plate

<<C>> >>A<<

10. Regulator assembly
11. Brush
12. Rubber packing
13. Rectifier
14. Rear bracket

AK304670

CHARGING SYSTEM

ENGINE ELECTRICAL

16-14

CAUTION

Do not insert the screwdriver blades too deep. 
Doing so could damage the stator coil.
Insert the blades of screwdrivers between the front 
bracket assembly and stator core, and pry and 
separate them with the screwdrivers.

<<B>> ALTERNATOR PULLEY REMOVAL

CAUTION

Perform operation carefully not to damage the 
rotor.
Clamp the rotor in a vise with the pulley facing up to 
remove the pulley.

<<C>> STATOR / REGULATOR 
ASSEMBLY REMOVAL

CAUTION

• Use a 180 − 250 W soldering iron, and finish 

unsoldering within four seconds. Diodes will 
be damaged by heat if unsoldering time is too 
long.

• Avoid applying undue force to the diode 

leads.

1. Unsolder the stator leads from the main diode of 

the rectifier assembly when the stator is removed.

2. When removing the rectifier assembly from the 

regulator assembly, undo the soldered points on 
the rectifier assembly.

REASSEMBLY SERVICE POINTS
>>A<< REGULATOR ASSEMBLY 
INSTALLATION

After installing the regulator assembly, insert a piece 
of wire through the hole in the rear bracket while 
pressing the brush to keep the brush against 
movement.
NOTE: Holding the brush with the wire facilities 
installation of the rotor.

>>B<< ROTOR INSTALLATION

Remove the brush holding wire after the rotor has 
been installed.

AK304671

AK304672

Solder

Solder

Rectifier 
assembly

AB

AK304673

Wire

AB

AK304674

Rear bracket

Brush

Wire

AB

AK304673

Wire

AB

CHARGING SYSTEM

ENGINE ELECTRICAL

16-15

INSPECTION 

M1161001700174

ROTOR

1. Measure the resistance between the two slip rings 

of the rotor coil to check the continuity between 
them.
Replace the rotor if the resistance is not within the 
standard value range.

Standard value: 3 

− 5 Ω

2. Check the continuity between the slip rings and 

core.

3. If continuity is present, replace the rotor.

STATOR

1. Check the continuity between coil leads.

If there is no continuity, replace the stator.

2. Check the continuity between coil and core.

If there is no continuity, replace the stator.

RECTIFIER ASSEBMLY

1. Check the condition of the (+) heat sink by 

checking continuity between the (+) heat sink and 
each of the stator coil lead connecting terminals.
If continuity is present for both terminals, the 
diode is shorted. Replace the rectifier assembly.

2. Check the condition of the (

−) heat sink by 

checking continuity between the (

−) heat sink and 

each of the stator coil lead connecting terminals.
If continuity is present in both directions, the diode 
is shorted. Replace the rectifier assembly.

AK304676

AK304677

AK304678

AK304679

AK304680

AK304681