Mitsubishi Heavy Industries L2 Service Manual page 132

ELECTRICAL SYSTEM
Voltmeter
Alternator
Figure 136 Checking for output
Figure 137 Removing alternator
Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
Ammeter
Lamp
Switch
Battery
ALTERNATOR AND DYNAMO
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.
Description
Cold
Alternator
output at
13.5V
Hot
Table 51 Output current
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.
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.
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.
ENGLISH
12V-35A 12V-40A
7A/1300 rpm
—
30A/2500 rpm
3A/1300 rpm —
23A/2500 rpm 21A/2500 rpm
36A/5000 rpm 37A/5000 rpm
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