Removing generator

Removing generator

1. Disconnect the leads from the generator.
2. Remove the drive belt as previously described.
3. Release the rear mounting bracket at the side of the power unit.
4. Remove the air cooling ducting from around the fan and generator area and lift away the unit.
5. Release the blower from the end of the armature shaft and finally, the mounting bolts from the air ducting.

Dismantling generator

1. Release the pulley self-locking nut and slide the pulley off the armature shaft.
2. Remove the two Woodruff keys on armature shaft.
3. Unscrew the two through bolt nuts and pull out the bolts.
4. Partially remove the commutator end head to the point where the brushes are. still seating on the commutator. Using a piece of hooked wire relieve the load of the springs on the brushes by arranging the spring ends on the brush sides. The brushes will be locked in their holders and cannot be chipped by striking against the armature shaft during the commutator end head removal.
5. Gently ease the commutator and fan end heads apart and, slide out the armature.

Servicing brushes

Lift the brushes up in the boxes and hold them in that position by letting each brush spring bear on the side of its brush. Fit the commutator end bracket over the commutator end of the armature shaft and release the brushes by hooking up the springs using a thin screw driver. Hold back each spring in turn and move the brush by pulling gently on the flexible connector. If the brush moves sluggishly remove it and polish the sides using a smooth file. Before this operation is actually carried out it is suggested that the brush is marked before removal so that it is replaced in its original working position.

inch, The minimum permissible length of a brush is

so renew any that are less than this figure. Test the brush springs using a spring tension scale. New springs should have a tension of 1.3 to 1.6 Ib. In service this value could fall slightly before performance is affected. Always bed in new brushes by wrapping fine sandpaper round the commutator, pressing down on the brush and rotating the commutator under it, or draw the paper too and fro. If new brushes are fitted always fit genuine Fiat replacements.