Alternator - Revised With A Freewheeling Pulley

911 (996)

13/99

2722

Binder - 2, Engine Electrics

FEBRUARY 10, 2000

SUBJECT:
Technical Information New Alternator

Vehicle Type:
911 Carrera (996)

Model Year:
As of 1999 (X)

Concern:
Introduction of a new alternator with a freewheeling pulley. Also, introduction of associated repair instructions when working on vehicles already equipped with a new alternator with freewheeling pulley.

Figure 1:

Information:
As of September 29, 1999 production and engine number M9604 66 Y 0328, the 911 Carrera (996) is equipped with a new type alternator with a freewheeling belt pulley. The new type alternator eliminates the need for a drive belt guide clip that was used to prevent drive belt derailing under certain conditions. The alternator with freewheeling pulley is only used in manual transmission vehicles.

Note:
When addressing drive belt derailing on vehicles equipped with the former type alternator, refer to Technical information Bulletin, Group. 1, # 10/99, and install a drive belt guide clip. DO NOT replace the alternator to repair drive belt derailing!

Parts Info.:

Part Number Description:

996 603 012 02 New/Alternator with freewheeling pulley

Other part numbers for reference:

996 603 012 01 Former/Alternator with fixed pulley
996 603 152 50 New/Freewheeling belt pulley
996 603 153 50 New/Protective cap for freewheeling belt pulley

Repairs:
When performing repairs on the new type alternator, a special tool must be used if the freewheeling pulley is to be removed. The tool is a 17 mm multiple-toothed adapter, part number, PNA 721 048.

Note:
Counterhold the multiple-tooth adapter with a 17 mm wrench when tightening. Torque the shaft with a 10 mm 12 pt. socket driver to 59 +/- 3.5 ft/lbs.