Chapters 28 Starting System Fundamentals
Chapters 28 Starting System Fundamentals
What we call the starting system is really the cranking system
There are 2 types of startersDirect drive, or 1:1
Crank @ ~ 250 rpm
Gear reduction, 2:1-4:1 Crank @ ~ 200 rpm
The parts of the starter
The Cranking ProcessAn electromagnet pulls the plunger into the
solenoid, engaging the starter’s pinion gear with the flywheel’s ring gear
Current travels to the armature through the brushes and commutator
An electromagnetic field created in the armature core windings causes the armature to spin
Field coils are used to strengthen the magnetic field
The overrunning clutch disengages the starter from the engine once it has started
Solenoids can be part of the starter or remote
Voltage drop test Engine must be cranking during test
Volt/Amp TesterTesting Battery Voltage
Testing Starter Draw
Why do we hit the starter when the engine won’t crank?