Starter Motor



Starter Motor

The Starter motor is a component which turns the engine of a car over.
The Starter motor has the following components in it :


1. Armature
2. Feild Coil / Pole Shoe
3. Housing
4. Brushes
5. Bushes
6. Starter Drive
There are 3 Type of Starters :
1.Inertia
2.Pre-Enage
3.Gear Reduction


Starter Motor In Bits



Ground Circut test :


Ground Short Circut between each of the commutor segments and the Armature core or shaft .


Should read 1. (infinity)

Testing Commutator :


Measuring the Commutator diameter and checking the mica undercut dept.

Checking Armature Shaft for run out :


To check for run-out, Place the armature between the ''V'' Blocks.




Turn the armature 360 while reading the dail test indicater set up onto the armator core as in the picture.

Testing for Internal short circuts using growler :1. Place the armature on the ''V'' of the growler.

2. Turn on the growler position


3.Hold a hacksaw blade or a metal strip along the armature and rotate the armature






Hacksaw blade will vibrate when placed over shorted winding indicating a shorted armature