CS-144A GENERATOR SERVICE PART P/N LISTED FOR REPAIR

MODELS AFFECTED: 1986 DE VILLE, ELDORADO, SEVILLE

The CS-144 120 amp generator used on all 1986 De Ville, Eldorado and Seville vehicies was originally serviced only as a complete assembly. DSIB 86-1-6, which should be destroyed, described the procedure for ordering remanufactured generators (P/N 10497111). Service parts for the CS-144 generator are now available through GMWDD and a listing of parts unique to this generator is provided below.

For diagnosis of the generator, refer to Section 6D of the Service Information Manual.

The CS-144 internal parts are similar to earlier models but are electrically different. Therefore, only service parts listed for the CS-144 should be used. There are also two basic design and assembly differences in the slip ring end bearing and drive end frame as compared to past models. These differences are as follows:

Slip Ring End Bearing Installation

A new slip ring end bearing (PIN 1999711) must be installed whenever the rotor is separated from the slip ring end frame.

1. Install the slip ring end bearing onto the rotor shaft by pressing on the inner race until the stop is reached. (Refer to Figure 1).

2. Guide the bearing into the slip ring end cavity being careful not to deform the toterance rings (plastic rings) that are part of the outer race of the bearing.

3. Install the four thru-bolts from the slip ring end frame to the drive end frame.

Drive End Frame

The drive end frame components are held onto the rotor shaft with a split tapered collar, which is NOT removable. Therefore, to service any drive end frame components such as: the rotor, front bearing, pulley or fan, the drive end frame assembly (P/N 10456357) must be replaced.

Service Parts Unique To The CS-144 Generator

Description Part Number ----------- ----------- Regulator 1116408 Rectifier Bridge 1989774 Stator Assembly 1989705 Ball Bearing - Slip Ring End 1989711 Slip Ring End Frame (includes ball bearing P/N 1989711) 1989706 Connector - Rectifier Bridge to Stator Lead 10497799 Brush Holder and Brush Assembly 1989702 Spring - Brush 1989659 Screw - Regulator Attaching (insulated) 1989699 Capacitor 1989703 Drive End Frame Assembly (includes rotor, ball bearings 10456357 drive end and slip ring end, pulley, and fan) CS-144, 120 AMP Generator (remanufactured) 10497111

For warranty purposes, use Labor Operation Number J4080 at .8 hour and the appropriate ADD condition when repairing the generator. When replacing generator with a remanufactured unit (P/N L0497111), use Labor Operation Number J4100 at .6 hour, zone approval will now be required with this labor operation.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.