Description & Operation

WARNING: Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see DISABLING & ACTIVATING AIR BAG SYSTEM in AIR BAG RESTRAINT SYSTEMS article in RESTRAINTS.

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

NOTE: Some ambulance models may be equipped with dual generators.

CS130 generator is non-repairable. It is electrically similar to earlier models. Major components of generators are delta stator, rectifier bridge, rotor with slip rings and brushes, a conventional pulley, dual internal fans and a voltage regulator. Pulley and fan cool the slip ring and frame.

The CS stands for Charging System and 130 is measurement, in millimeters, of outside diameter of stator laminations. Generator is rated at 100 amperes.

Generator features permanently lubricated bearings. Service should only include tightening of mounting components. Otherwise, generator is replaced as a complete unit.

Voltage regulator controls field current of the rotor in order to limit system voltage. Regulator switches current on and off at a rate of 400 cycles per second performing following functions:

Radio noise control.
Obtain correct average current needed for proper system voltage control.

At high speeds, on-time may be 10 percent with off-time at 90 percent. At low speeds, on-time may be 90 percent and off-time 10 percent.

IPC illuminates battery indicator when following occurs:

Generator output is less than 11 volts or 16 volts or more (switched low).
IPC performs displays test at start of each ignition cycle. Indicator illuminates for approximately 3 seconds.
Ignition switch is in RUN position, with engine off (not charging).