The generator decoupler (2) is used only with certain engines. Two different type generator decoupler pulleys are used. One can be identified by the use of machined splines (3).

The other can be identified by a hex opening (2) and will not use splines.Different special tools are required to service each different decoupler. Refer to following procedure.

Disconnect negative battery cable.Remove generator and accessory drive belt. Refer to Generator Removal.Position Special Tool #8823 (VM.1048) (2) into decoupler (1).

Determine if end of generator shaft is hex shaped (2) or.....

.....or is splined (2).

If hex is used, insert a 10mm deep socket (1) into tool #8823 (VM.1048) (2).

If splined, insert a 5/16” 6-point hex driver, or a 10mm 12-point triple square driver (1) into tool #8823 (VM.1048) (2).The generator shaft uses conventional right-hand threads to attach decoupler. To break decoupler loose from generator threads, rotate tools as shownAfter breaking loose with tools, unthread decoupler by hand from generator.

Disconnect negative battery cable.Remove generator and accessory drive belt. Refer to Generator Removal.Position Special Tool #8433 into decoupler. Align to hex end of generator shaft.

The generator shaft uses conventional right-hand threads to attach decoupler. To break decoupler loose from generator threads, rotate end of tool clockwise.After breaking loose with tool, unthread decoupler by hand from generator.