Starter Motor - Dodge Dakota Sport 2001 Service Manual

AN
SPECIFICATIONS (Continued)
Free Running Test Maximum
Amperage Draw
Free Running Test Minimum
Speed
Solenoid Closing Maximum
Voltage Required
* Cranking Amperage Draw
Test
* Test at operating temperature. Cold engine, tight (new) engine, or heavy oil will increase starter amperage draw.
SPECIFICATIONS - TORQUE - STARTING SYSTEM
Battery Cable Eyelet Nut at Solenoid Stud
Starter Mounting Bolts – 2.5L Engine
Starter Mounting Nuts/Bolts – V-6/V-8 Engines

STARTER MOTOR

DESCRIPTION
The 2.5L starter is mounted with two bolts to the
clutch housing on the right side of the engine. The
4.7L automatic transmission
mounted with two bolts to the torque converter hous-
ing on the left side of the engine. The starter motors
for all of the remaining engine and transmission
combinations are mounted with one bolt, a stud and
a nut to the clutch or convertor housing, and are
located on the left side of the engine.
The electric motors of both starters have four
brushes contacting the motor commutator. The 2.5L
starter motor uses four permanent magnets for the
field poles, while the other starter motors feature
four electromagnetic field coils wound around four
pole shoes.
The starter motors are serviced only as a unit with
starter solenoids, and cannot be repaired. If either
component is faulty or damaged, the entire starter
motor and starter solenoid unit must be replaced.
OPERATION
The starter motor is equipped with a gear reduc-
tion (intermediate transmission) system. The gear
reduction system consists of a gear that is integral to
the output end of the electric motor armature shaft
that is in continual engagement with a larger gear
that is splined to the input end of the starter pinion
gear shaft. This feature makes it possible to reduce
the dimensions of the starter. At the same time, it
allows higher armature rotational speed, and delivers
Starter Motor and Solenoid
90 Amperes
2600 rpm
7.8 Volts
130 Amperes
DESCRIPTION
starter motor
73 Amperes
3601 rpm
7.5 Volts
125 - 250 Amperes
N·m
14
54
68
increased torque through the starter pinion gear to
the starter ring gear.
The starter motor is activated by an integral heavy
duty starter solenoid switch mounted to the overrun-
ning clutch housing. This electromechanical switch
connects and disconnects the feed of battery voltage
is
to the starter motor, and actuates a shift fork that
engages and disengages the starter pinion gear with
the starter ring gear.
The starter motor uses an overrunning clutch and
starter pinion gear unit to engage and drive the
gears on the flywheel (or flywheel ring gear).
DIAGNOSIS AND TESTING - STARTER MOTOR
Correct starter motor operation can be confirmed
by performing following free running bench test. This
test can only be performed with starter motor
removed from vehicle. Refer to Starting Specifica-
tions for starter motor specifications.
(1) Remove starter motor from vehicle. Refer to
Starter MotorRemoval and Installation.
(2) Mount starter motor securely in a soft-jawed
bench vise. The vise jaws should be clamped on
mounting flange of starter motor. Never clamp on
starter motor by field frame.
(3) Connect suitable volt-ampere tester and 12-volt
battery to starter motor in series, and set ammeter to
100 ampere scale. See instructions provided by man-
ufacturer of volt-ampere tester being used.
(4) Install jumper wire from solenoid terminal to
solenoid battery terminal. The starter motor should
operate. If starter motor fails to operate, replace
faulty starter motor assembly.
STARTING 8F - 35
73 Amperes
3601 rpm
7.5 Volts
125 - 250 Amperes
Ft. Lbs. In. Lbs.
120
40
50