For particular engines, a generator decoupler is available in two forms, one using machined splines and another that fits over the engine's hex. Disconnect the negative battery first and afterwards, get the accessory
Drive Belt and generator off. To use this tool (VM.1048), engage the decoupler, check the generator shaft for hex or spline connectors. If the spline is hex, choose a 10MM socket or a 6-point hex driver; if it's splined, go with a 10MM 12-point triple square driver. Turn the tool clockwise to loosen the decoupler and unthread it by hand afterward. With the Litens decoupler, do the same steps then attach Special Tool #8433 to the hex end of the generator shaft and slide the decoupler out. To fit the INA decoupler, slide the decoupler pulley onto the generator shaft with your hands, use Special Tool #8823 and then decide on the proper driver for the shaft type. Make sure you use a torque wrench as the instructions state, tighten clockwise to remove parts, then tighten counter-clockwise to replace parts and follow this with reinstallation of the accessory drive belt and generator. To install the Litens decoupler, carry out the same threading and placement steps, use the proper torque wrench and follow the mentioned installation process.