RAM 2500 Truck 4WD V8-5.2L VIN Y (2000)
Starter Motor: Description and Operation
The starter motors used for these engines available in this model are interchangeable.
Each of these starter motors incorporates several of the same features to create a reliable, efficient, compact, lightweight and powerful unit. The electric
motors of all of these starters have four brushes contacting the motor commutator, and feature four electromagnetic field coils wound around four pole
shoes. These engine starter motors are rated at 1.4 kilowatts (about 1.9 horsepower) output at 12 volts.
All of these starter motors are serviced only as a unit with their starter solenoids, and cannot be repaired. If either component is faulty or damaged, the
entire starter motor and starter solenoid unit must be replaced.
These starter motors are equipped with a gear reduction (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 increased torque through the starter pinion gear to the starter ring gear.
The starter motors for all engines are activated by an integral heavy duty starter solenoid switch mounted to the overrunning clutch housing. This
electromechanical switch connects and disconnects the feed of battery voltage to the starter motor, also engaging and disengaging the starter pinion gear
with the starter ring gear.
All starter motors use an overrunning clutch and starter pinion gear unit to engage and drive a starter ring gear that is integral to the flywheel (manual
transmission), torque converter or torque converter drive plate (automatic transmission) mounted on the rear crankshaft flange.
