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DIAGNOSIS AND TESTING - GENERATOR DECOUPLER CONDITION POSSIBLE CAUSES CORRECTION Does not drive generator (generator not charging) Internal failure Replace decoupler Noise coming from decou- pler Internal failure Replace decoupler REMOVAL The generator decoupler is used only with certain engines. Two different type generator decoupler pulleys are used. One can be identified by the use of machined Different special tools are required to service each different decoupler. Refer to following procedure. INA Decoupler (1) Disconnect negative battery cable. Refer to Generator Removal. (3) Position Special Tool #8823 (VM.1048) into decoupler (Fig. 5). (4) Determine if end of generator shaft is hex shaped (Fig. 6) or is splined (Fig. 7). If hex is used, (5) The generator shaft uses conventional right- hand threads to attach decoupler. To break decoupler (6) After breaking loose with tool, unthread decou- pler by hand from generator. Fig. 3 GENERATOR DECOUPLER PULLEY (INA) 1 - GENERATOR Fig. 4 GENERATOR DECOUPLER PULLEY (LITENS) 1 - DECOUPLER (LITENS) 8F - 20 CHARGING SYSTEM VA |