Charging; Description; Generator Description; Removal - Jeep 2002 WJ Service Manual

8Fa - 2

CHARGING

GENERATOR

DESCRIPTION

The generator is belt-driven by the engine. It is
serviced only as a complete assembly. If the genera-
tor fails for any reason, the entire assembly must be
replaced. On certain generators, a decoupler is used.
Refer to Generator Decoupler for additional informa-
tion.
As the energized rotor begins to rotate within the
generator, the spinning magnetic field induces a cur-
rent into the windings of the stator coil. Once the
generator begins producing sufficient current, it also
provides the current needed to energize the rotor.
The Y type stator winding connections deliver the
induced AC current to 3 positive and 3 negative
diodes for rectification. From the diodes, rectified DC
current is delivered to the vehicles electrical system
through the generator, battery, and ground terminals.
Noise emitting from the generator may be caused
by:
• Worn, loose or defective bearings
• Loose or defective drive pulley
• Incorrect, worn or damaged drive belt
• Loose mounting bolts
• Misaligned drive pulley
• Defective stator or diode
• Damaged internal fins

REMOVAL

WARNING: DISCONNECT
CABLE BEFORE REMOVING GENERATOR B+ OUT-
PUT WIRE FROM GENERATOR. FAILURE TO DO SO
CAN RESULT IN PERSONAL INJURY OR DAMAGE
TO VEHICLE ELECTRICAL SYSTEM.
(1) Disconnect negative battery cable.
(2) Remove accessory drive belt from generator
pulley by relieving tension on belt tensioner. Refer to
Cooling System for procedure.
(3) Remove turbo intercooler hose (Fig. 1).
(4) Loosen (but do not remove) mounting bolt for
idler pulley (Fig. 1).
(5) The generator uses 4 horizontally mounted
bolts (Fig. 2). Remove 2 upper generator mounting
bolts.
(6) Raise vehicle.
(7) Lower oil pan splash shield at right frame rail
by disconnecting 2 clips (Fig. 3).
(8) Remove bolt at air conditioning line support
bracket (Fig. 4).
(9) Remove B+ output cable nut and cable at rear
of generator.
(10) Disconnect generator field wire connector
from rear of generator.
NEGATIVE BATTERY
(11) Remove 2 lower generator mounting bolts
(Fig. 2). Note lower bolts are slightly shorter than
upper bolts.
(12) Lower generator for removal.
Fig. 1 TURBO INTERCOOLER HOSE
1 - INTERCOOLER HOSE
2 - IDLER PULLEY
Fig. 2 GENERATOR - 2.7L DIESEL
1 - GENERATOR
2 - LOWER MOUNTING BOLTS
3- UPPER MOUNTING BOLTS

INSTALLATION

(1) Raise generator into position from bottom of
vehicle.
WG