Alternator Pulley / Clutch: Service and Repair

Pulley - Generator 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 splines (3).




The other decoupler is equipped with a hex opening (2) and will not use splines.

Different special tools are required to service each different decoupler.

INA Decoupler

REMOVAL
1. Disconnect negative battery cable.
2. Remove generator and accessory drive belt.




3. Position Special Tool #8823 (VM.1048) (2) into decoupler (1).




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




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




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




7. If splined, insert a 5/16 6-point hex driver (1), or a 10MM 12-point triple square driver into tool #8823 (VM.1048).




8. The generator shaft uses conventional right-hand threads to attach decoupler. To break decoupler loose from generator threads, rotate end of tool (1) clockwise or...........,




9. rotate end of tool (1) clockwise.
10. After breaking loose with tool, unthread decoupler by hand from generator.

INSTALLATION




1. Thread decoupler pulley onto generator shaft by hand (right-hand threads).
2. Position Special Tool #8823 (VM.1048) into decoupler.
3. Determine if end of generator shaft is hex shaped or is splined. If hex is used, insert a 10MM deep socket (1) into tool #8823 (VM.1048) or..............




4. ............if splined, insert a 5/16 inches 6-point hex driver (1), or a 10MM 12-point triple square driver into tool #8823 (VM.1048).
5. Do not use an adjustable, ratcheting "click type" torque wrench. Most "click type" wrenches will only allow torque to be applied in a clockwise rotation. Use a dial-type or beam type wrench. Tighten in counter-clockwise rotation. Torque to 80 N.m (59 ft. lbs.).
6. Install accessory drive belt, and generator.
7. Connect negative battery cable.

Litens Decoupler

REMOVAL




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




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

INSTALLATION




1. Thread decoupler pulley onto generator shaft by hand (right-hand threads).
2. Position Special Tool 8433 into decoupler. Align tool to hex end of generator shaft.
3. Do not use an adjustable, ratcheting "click type" torque wrench. Most "click type" wrenches will only allow torque to be applied in a clockwise rotation. Use a dial-type or beam type wrench. Tighten in counter-clockwise rotation. Torque to 80 N.m (59 ft. lbs.).
4. Install accessory drive belt, and generator.
5. Connect negative battery cable.