Mitsubishi Lancer Evolution VI. Manual - part 26

ENGINE  – 

Alternator

11-79

ALTERNATOR

DISASSEMBLY AND REASSEMBLY

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Disassembly steps

A

A

"

1. Front bracket assembly

A

B

"

2. Alternator pulley

"

B

A

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

A

C

"

8. Stator
9. Plate

A

C

" "

A

A

10. Regulator assembly

11. Brush

12. Slinger
13. Rectifier
14. Rear bracket

ENGINE  – 

Alternator

11-80

DISASSEMBLY SERVICE POINTS

A

A

"

FRONT BRACKET ASSEMBLY REMOVAL

Insert a flat tip screwdrivers or the like in the clearance between
the front bracket assembly and stator core, to pry open and
separate the stator and front bracket.

Caution
Do not insert the screwdriver too far, or the stator coil
gets damaged.

A

B

"

ALTERNATOR PULLEY REMOVAL

Face pulley side upward, fix the rotor with a work bench
and remove the pulley.

Caution
Use care not to damage the rotor.

A

C

"

STATOR / REGULATOR ASSEMBLY REMOVAL

(1) Unsolder the stator with a soldering iron (180 to 250

W). Complete this work within four seconds not to transfer
heat to the diode.

(2) When removing rectifier from the regulator assembly,

remove the soldered sections to rectifier.

Caution
1.

Use care to make sure that the heat of the soldering
iron is not transmitted to the diodes for a long
period.

2.

Use care that no undue force is exerted to the
lead wires of the diodes.

REASSEMBLY SERVICE POINTS

"

A

A

REGULATOR ASSEMBLY INSTALLATION

After installing the regulator assembly, insert a wire into the
hole provided on the rear bracket while pressing in the brush
to fix the brush.

NOTE
The brush is fixed when a wire is inserted, making rotor
installation easier.

Soldered

Rear bracket

Brush

Wire

Wire

ENGINE  – 

Alternator

11-81

"

B

A

ROTOR INSTALLATION

After installing the rotor, remove the wire used to fix the brush.

INSPECTION

ROTOR CHECK

(1) Check the continuity between the rotor coil slip rings,

and replace the rotor if the resistance value is not at
the standard value.

Standard value: 3 – 5 

Ω

(2) Check the continuity between the slip ring and core, and

if there is continuity, replace the rotor.

STATOR CHECK

(1) Check the continuity between the coil leads, and if there

is continuity, replace the stator.

(2) Check the continuity between the coil and core, and if

there is continuity, replace the stator.

Wire

ENGINE  – 

Alternator

11-82

RECTIFIERS CHECK

(1) Inspect the (+) heat sink by checking the continuity

between the (+) heat sink and stator coil lead wire
connection terminal using a tester probe.
If there is a continuity at both, the diode is short circuited,
so replace the rectifier.

(2) Inspect the (–) heat sink by checking the continuity

between the (–) heat sink and stator coil lead wire
connection terminal using a tester probe.
If there is a continuity at both, the diode is short circuited,
so replace the rectifier.

(3) Check the diode trio by connecting an ohmmeter to both

ends of each diode and check the continuity of the three
diodes. 
If there is a continuity at both ends, or if there is no
continuity, the diode is damaged so replace the recitifier.

BRUSH CHECK

(1) Measure the length of the brush protrusion shown in the

illustration, and replace the brush if the measured value
is below the limit value.

Limit: 2 mm or less

(2) The brush can be removed if the solder of the brush

lead wire is removed.

(3) When installing a new brush, insert the brush into the

holder as shown in the illustration, and then solder the
lead wires.

Protrusion
length

Soldered