PRO TECHNICIAN

Reduction Starter

Operation

Click on the appropriate button in the illustration.
1. Magnetic switch
2. General
The magnetic switch has two functions.
Motor ON/OFF
Pinion gear engagement and disengagement
Also, the magnetic switch operates in three steps when the starter is operated.
Pull-in
Hold-in
Return
The figure on the left below summarizes the magnetic switch operation.

SERVICE HINT:

If an open circuit occurs in the pull-in coil, it cannot pull in the plunger resulting in a symptom where the starter will not function (no operational sound from the magnetic switch).
If the main contacts have poor contact, insufficient current will flow to the field coils and the armature coil, and the starter revolutions decrease.
If an open circuit occurs in the hold-in coil, it cannot hold in the plunger resulting in the plunger repeatedly “popping” in and out.

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