Fiat Kobelco EX355 Tier2, Technical Manual

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EX355 W5-8-1
STARTING AND CHARGING
SERVICE PRECAUTION
• Be sure to use the correct fastener in the proper
location. If a used fastener is replaced with a
new one, the new fastener must be identical to
the previous one.
• Some fasteners must always be replaced with
new ones following removal. These fasteners
are specified in this Manual.
• Some fasteners require thread locker or thread
sealant. These fasteners are specified in this
Manual.
• Supplemental fastener coatings (paint, grease,
or corrosion inhibitor) affect fastener torque
and clamping force. They may damage the fas-
tener. Do not use them unless specifically
called for.
• Tighten all fasteners to the specified torque. If
there is a tightening sequence, follow it exactly.
ALTERNATOR
General Description
The engine uses a brushless alternator. Main alterna-
tor components are the rotor, the stator, the rectifier,
the front and rear brackets, the IC regulator, the
bearings, and the pulley. Moving parts include the
rotor and the pulley. The field coil is installed to the
rear bracket. 6 main diodes (3 positive and 3 negative)
in conjunction with 2 sub-diodes provide 3-phase
rectification. The diodes are installed to the stator coil.
An additional 3 diodes (diode trio) are used to provide
field current. The alternator has 3 terminals.
a. Terminal B: DC power output
b. Terminal L: Exciting current input
c. Terminal R: Exciting current input
Terminal R is active only until the alternator begins to
generate electricity.
Terminal L also serves as a voltage output terminal.
When the voltage across terminal L is equal to the
battery voltage, the indicator lamp (no charging) turns
off.
Sealed bearings requiring no lubrication are used
throughout the alternator.
The IC regulator is a solid-state device and is serviced
as a unit. It cannot be disassembled.
Identification
The alternator identification plate is attached to the
alternator rear bracket. The ISUZU part number, the
manufacturer’s code number, and other important
information are stamped on the plate.
Refer to the identification plate together with the “Main
Data and Specifications” Tables and accompanying
charts in this Manual when requesting service assist-
ance from a qualified electrical repair shop.
If you are unable to locate the data applicable to your
engine, please contact ISUZU MOTORS LIMITED
through your machine supplier.
SM7341
MITSUBISHI IDENTIFICATION PLATE
A: Isuzu part number
B: Manufacturer’s abbreviated name
C: System voltage output
D: Manufacturer’s lot No.
E: Bar code