For 1990-2009 cars

# CS-144 GENERATOR SERVICE PROCEDURE AND P/N

#### VEHICLES AFFECTED: ALL 1986-87 WITH CS-144 GENERATOR

The CS-144 generator used on the above listed models was originally serviced only as a complete assembly. See Service Bulletin 86-6-108 for a listing of remanufactured generators. Service parts for the CS-144 generator are now available through GM Parts, and a listing of parts unique to these generators is provided.

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 is also a basic design and assembly difference in the slip ring end bearing as compared to past models. This difference is as follows:

Slip Ring End Bearing Installation

A new slip ring end bearing (Part Number 1989711) 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 (See Illustration).

2. Guide the bearing into the slip ring end cavity being careful not to deform the tolerance 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.

CS 144 - SERVICE PART NUMBERS 1986 & 1987 MODELS ------------------ 86-87E 87 G 87 H,C 86 A,H,E 86A,H USAGE: QTY. 3.8T 3.8L 3.8L 3.8L ----- REQ'D 120AMP 108AMP 108AMP 120AMP ----- ------ ------ ------ ------

Original Equipment 1101183 1101250 1105615 1105616 Generator *Remanufactured Generator 10463027 10463033 10456319 10497108 *Regulator 1 1116411 1116411 1116408 1116408 *Rotor Assembly 1 1989708 1989599 1989599 1989708 *Stator Assembly 1 1989705 1989705 1989705 1989705 *S.R.E. Frame 1 1989706 1989706 1989706 1989706 *Ball Bearing - S.R.E. 1 1989711 1989711 1989711 1989711 *Rectifier Bridge-Pos. 1 1989774 1989774 1989774 1989774 *Nut-Rectifier Bridge 3 453996 453996 453996 453996 *Connector-From Rect. 1 10497789 10497789 10497789 10497789 Bridge to Reg. Screw & Washer-Rect. 2 1988971 1988971 1988971 1988971 Bridge Attachment *Brush Holder & Brush Assy 1 1989702 1989702 1989702 1989702 *Spring-Brush 2 1989659 1989659 1989659 1989659 Screw-Brush Holder 1 1894586 1894586 1894586 1894586 Attachment (Ground) *Screw-Regulator 1 1989699 1989699 1989699 1989699 Attachment (Insulated) Terminal Package-Battery 1 1975471 1975471 1975471 1975471 *Capacitor 1 1989703 1989703 1989703 1989703 Screw-Capacitor & Rec. 1 1988970 1988970 1988970 1988970 Bridge Attachment *Frame-D.E. 1 1989601 1989601 1989601 1989601 Ball Bearing-D.E. 1 908419 908419 908419 908419 Plate-Ball Bearing 1 1977674 1977674 1977674 1977674 Retain.-D.E. Screw-Ball Brg. Retain. 3 1975736 1975736 1975736 1975736 Plate Attachment Collar-Shaft-Outside 1 1985999 1985999 1985999 1985999 D. E. Collar-Shaft-Inside 1 1986000 1986000 1986000 1986000 D. E. Collar-Shaft Between 1 1978064 1978064 1978064 1978064 Fan & Pulley Nut-Shaft-D.E. 1 1915172 1915172 1915172 1915172 Lockwasber-Shaft 1 1941978 1941978 1941978 1941978 Nut-D.E. *Thru Bolt 4 1989690 1989690 1989690 1989690 Pulley 1 1989104 1985964 1985964 1989104 Fan 1 1978026 1978026 1978026 1978026

* New Part S.R.E. - Slip Ring End D. E. - Drive End

86 H 86 H 86 G USAGE: QTY. 3.0L 3.0L 3.8LT ----- REQ'D 108AMP 120AMP 120AMP ----- ------ ------ ------

Original Equipment 1105625 1105626 1105685 Generator *Remanufactured Generator 10456332 10497110 10497176 *Regulator 1 1116408 1116408 1116408 *Rotor Assembly 1 1989599 1989708 1989708 *Stator Assembly 1 1989705 1989705 1989705 *S.R.E. Frame 1 1989706 1989706 1989706 *Ball Bearing - S.R.E. 1 1989711 1989711 1989711 *Rectifier Bridge-Pos. 1 1989774 1989774 1989774 *Nut-Rectifier Bridge 3 453996 453996 453996 *Connector-From Rect. 1 10497789 10497789 10497789 Bridge to Reg. Screw & Washer-Rect. 2 1988971 1988971 1988971 Bridge Attachment *Brush Holder & Brush Assy 1 1989702 1989702 1989702 *Spring-Brush 2 1989659 1989659 1989659 Screw-Brush Holder 1 1894586 1894586 1894586 Attachment (Ground) *Screw-Regulator 1 1989699 1989699 1989699 Attachment (Insulated) Terminal Package-Battery 1 1975471 1975471 1975471 *Capacitor 1 1989703 1989703 1989703 Screw-Capacitor & Rec. 1 1988970 1988970 1988970 Bridge Attachment *Frame-D.E. 1 1989709 1989709 1989601 Ball Bearing-D.E. 1 908419 908419 908419 Plate-Ball Bearing 1 1977674 1977674 1977674 Retain.-D.E. Screw-Ball Brg. Retain. 3 1975736 1975736 1975736 Plate Attachment Collar-Shaft-Outside 1 1985999 1985999 1985999 D. E. Collar-Shaft-Inside 1 1986000 1986000 1986000 D. E. Collar-Shaft Between 1 1978064 1978064 1978064 Fan & Pulley Nut-Shaft-D.E. 1 1915172 1915172 1915172 Lockwasber-Shaft 1 1941978 1941978 1941978 Nut-D.E. *Thru Bolt 4 1989690 1989690 1989690 Pulley 1 1905964 1989LQ4 1989104 Fan 1 1978026 1978026 1978026

* New Part S.R.E. - Slip Ring End D. E. - Drive End

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.