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
).
Post-installation Operation
• Drive Belt Installation (Refer to GROUP 11A, Crankshaft
Pulley
).
• Drive Belt Tension Check (Refer to GROUP 11A,
On-vehicle Service
).
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
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
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