Alternator & Regulator - Delco-Remy Chevrolet Astro I

DESCRIPTION

The CS130 (Charging System) generator have a high amperage output. The 130 designation is the outside diameter of the stator laminations, measured in millimeters. This generator series also has an integral regulator but does not have a diode trio. (Scheme 1) The delta wound stator, rectifier bridge, rotor with slip rings, and brushes are similar to other generators. A conventional fan and pulley are used. An internal fan cools the slip rings, end frame, rectifier bridge and regulator.

The CS130 generator should not be disassembled for any reason. The generator requires no periodic maintenance or adjustment and can not be serviced.

Note. The terms generator and alternator are interchangeable. Either may be found within illustrations.

Scheme 1

GENERATOR IDENTIFICATION & OUTPUT

OPERATION

Regulator voltage varies to compensate for temperature. Voltage is regulated by controlling rotor field current. The regulator switches rotor field current on and off at a fixed frequency of about 400 cycles per second.

The regulator has 4 terminals: "P", "L", "I" and "S". (Scheme 2) The "L" terminal and/or the "I" terminal is used to turn on reg ulator and allows field current to flow when ignition switch is turned to START or RUN position. The "L" terminal is connected through a charging indicator light or resistor. The "I" terminal is connected to positive battery terminal either directly or through a resistor. These terminals are often used in parallel and are connected to 2 different vehicle circuits.

The "P" terminal is connected internally to the stator and may be wired to a tachometer or other device. The "S" terminal may be used to sense voltage at another vehicle location for voltage control. If "S" terminal is not used, generator uses an internal sensor for voltage control.

Scheme 2

BELT TENSION

BELT ADJUSTMENT

TROUBLE SHOOTING

Note. See the TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL TROUBLE SHOOTING section.

ON-VEHICLE TESTING

Note. Before making electrical checks, visually inspect all terminals for clean, tight connections. Check generator mounting bolts and drive belt tension. Ensure battery is in good condition prior to testing charging system.

OVERCHARGED OR UNDERCHARGED BATTERY

1. If an overcharging condition is suspected, run engine at moderate speed. Connect voltmeter across battery terminals. If voltmeter indicates more than 16 volts, replace generator.
2. If an undercharging condition is suspected, disconnect 4-wire connector from generator. Turn ignition on with engine off. Connect a voltmeter between terminal "L" in wiring harness and ground. (Scheme 2) Record reading.
3. If terminal "I" is used, connect voltmeter between terminal "I" and ground. Record reading. If voltmeter reads battery voltage, circuits are okay. If voltmeter reads zero, this indicates an open circuit between terminal checked and battery. Repair as necessary.

GENERATOR OUTPUT TEST

1. Connect an ammeter in series with wire connected to BAT terminal of generator. (Scheme 2) Turn on all available accessories. Connect a carbon pile across battery. Operate engine at 2000 RPM. Adjust carbon pile (as required) to obtain maximum current output while maintaining 13 volts or more.
2. Ampere output must be within 15 amps of rated output. If output is not within 15 amps of rated output, replace generator. See «GENERATOR IDENTIFICATION & OUTPUT»(/chevrolet/astro/i-1985-2005/remont/charging-system/#alternator-regulator-delco-remy) table.

BENCH TESTING

Note. Internal components of CS130 generator are not serviceable. Generator replacement is required.

REMOVAL & INSTALLATION

Disconnect negative battery cable. Remove drive belt. Remove nut retaining positive battery terminal. Disconnect generator electrical connector. Remove mounting bolts, nuts, braces and brackets. Remove other components as necessary. Remove generator. To install, reverse removal procedure.

OVERHAUL

Note. CS130 is not serviceable. Replacement is required.

GENERATOR SPECIFICATIONS

TORQUE SPECIFICATIONS

Charging System Wiring Diagram. Scheme 3

See also:
• GENERATOR IDENTIFICATION & OUTPUT