G424 Service Manual Adjustment and Troubleshooting193
Brush holder not properly insulated –Clean brush or replace holder.
Worn bearing bushing –Replace bushing.
Wires of armature coil about to be –Rewind or replace.
shortcircuited or grounded
Field coil not properly connected or –Repair connections.
about to be short-circuited
Commutator heat-damaged with consequent –Replace armature.
poor conduction
Brush movement due to damaged or worn –Repair or replace.
commutator
Commutator vibrating, causing brush to –Repair or replace.
move
Lifted mica between commutator –Perform under-cutting
segments causing brush to move
One or two commutator segments –Repair or replace.
lifted causing brush to move
Commutator in loose contact due –Repair or replace.
to worn brush
Chipped brush –Repair or replace.
Worn starter clutch pinion end –Replace.
Clutch rotates always freely –Replace.
Deteriorated clutch drive spring –Replace.
Does not rotate in overrunning direction –Replace.
Poor sliding of splined section –Rub surfaces smooth, clean and repair.
Worn bushing –Replace.
Improper projecting position of magnet –Adjust with stud bolt.
switch pinion
Worn bearing bushing –Replace.
Magnet switch coil layer shorted-circuited –Replace.
Magnet switch contact plate seizure –Replace.
Starter switch does not return properly –Replace switch.
Starter does not
rotate.
Starter rotates but
slowly and
irregularly.
Pinion does not
engage with ring
gear.
Motor continues to
rotate and does not
stop.
Starter
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