HEAVY DUTY ALTERNATORS
The IH heavy duty alternators (Figure 1) are 14 volt self
load limiting alternators which feature a built-in solid-
state voltage regulator.
Figure 1 - Alternator Assembly.
Alternators built through late 1983 are equipped with
adjustable voltage regulators.
Alternators built more recently are equipped with fixed
voltage" regulators which cannot be adjusted. These
regulators are identified by the absence of the plastic
screw that was used to plug the voltage adjustment
access hole (Figure 2).
interchangeable and have the same part number. Only
the non-adjustable type will be provided for service after
stock of the adjustable type is depleted.
The alternators incorporate a 7/8" straight shaft, a large
ball bearing at the drive end and a roller bearing at the
slip ring end. The alternators have a two leg swivel
mounting, one leg of which is equipped with a slideable
Figure 2 - Voltage Regulators.
Six silicon diodes mounted in heat sinks convert
alternating current from the delta wound stator into direct
current. A capacitor connected between the heat sinks
assists in suppressing transient voltage spikes which
could possibly injure the diodes.
The brushes and voltage regulator are located in a
replacement or inspection without dismantling the entire
Current is produced by rotating a magnet called a rotor
inside a stationary winding called a stator.
CTS-4043A - Chapter II - Page 2