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Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
ALTERNATOR AND DYNAMO
ENGLISH
ELECTRICAL SYSTEM
33.4 Output inspection
1. Disconnect the grounding cable from the battery.
2. Connect an ammeter between the battery and
alternator terminal “B”. Ground the terminal “B”
through a voltmeter.
3. Connect the battery cable to ground.
4. Start the engine.
5. Apply all load including the lamps.
6. Increase engine speed until normal alternator
speed is attained. Read the maximum indication of
the ammeter at 13.5V of voltmeter indication.
Output current must correspond to the
specification in the table.
33.5 Removal
1. Disconnect the battery cable.
2. Disconnect lead wire from terminal “B” on the back
of alternator.
3. Disconnect the alternator connector.
4. Loosen the alternator brace bolt and support bolt.
Push the alternator toward the engine and remove
the fan belt.
5. Dismount the alternator.
33.6 Disassembly of alternator
1. Remove three through bolts.
2. Heat the rear bracket around the rear bearing
portion up to 50 to 60°C [122 to140°F] (with a
solder iron) and separate the bracket from the
stator coil.
3. Grip the rotor in a vise, remove the pulley nut, and
pull out the pulley, fan and spacer.
4. Pull out the rotor assembly from the front bracket.
Figure 136 Checking for output
Battery
Ammeter
Alternator
Switch
Voltmeter
Lamp
Description 12V-35A 12V-40A
Alternator
output at
13.5V
Cold
7A/1300 rpm
—
30A/2500 rpm
Hot
3A/1300 rpm —
23A/2500 rpm 21A/2500 rpm
36A/5000 rpm 37A/5000 rpm
Table 51 Output current
Figure 137 Removing alternator
CAUTION
a. Insert a screwdriver blade into the clearance
between the stator core and front bracket and pry
up.
b. Be careful not to insert the blade too deep.
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