When You Need An Electrical Automotive Repair
The function of the starting system is to crank the engine.This system is composed of a starting motor,solenoid and battery.The battery supplies the electrical energy to the solenoid, witch then completes the circuit to the starting motor witch does the actual work of cranking the engine.
Non-Reduction Gear Type Of Starter Motor.
On this starter the solenoid is mounted on the top of the starter motor.When the ignition switch is operated the solenoid gearshift lever moves the starter drive pinion gear into engagement with the teeth on the flywheel.
Reduction Gear Type Of Starter Motor
This starter operates in a similar manner to the type described above except that in order to offset extremely low temperatures, increased rotating torque is provided through a reduction gear located between the armature and the pinion gear.
An overrunning clutch is installed on both types of starter motors to transmit the driving torque and to prevent the armature from overrunning when the engine fires and starts.
The solenoid and the starting motor are mounted together at the rear right side of the engine.No periodic lubrication or maintenance is required for the starter system component.Never operate the starter motor for more than 30 seconds at a time without pausing to allow it to cool for at least two minutes. Excessive cranking can cause overheating,witch can seriously damage the starter.
Fault Diagnosis Of The Starting System
If the starter motor does not rotate when the switch is operated on an automatic transmission equipped model,make sure that the shifter is in the neutral or parking position.Check the battery is well charged and all cables,both at the battery and the starter solenoid terminals ,are clean,free from corrosion and secure.
The starter motor can be heard spinning but the engine is not being cranked then the overrunning clutch in the starter motor is slipping and the assembly must be removed from the engine and replaced.
Often when the starter fails to operate,a click can be heard coming from the starter solenoid when the ignition switch is turned to the start position.If the starter turns at all, then the starter current should be tested.
Turn the ignition switch to the start position and listen for a click from the solenoid.If there still is no click and the starter does not turn,both the solenoid and the starter are defective and should be replaced.If a click is heard and the starter turns,then there is an open circuit in the ignition switch,inhibitor switch or relay or in the wires or connectors.
If the starter turn the engine slowly,that mean the battery discharged,starter motor connection loose,or the starter brushes worn or sticking.And if the starter motor is noisy,the pinion or the flywheel ring gear badly worn, or mounting bolts loose.
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