Alternator Repair

What could be described as the powerhouse of a modern automobile is a small device called the alternator. It is because of the alternator, that modern automobiles can support the myriad electrical accessories and keep all the electrical systems running. For smooth functioning of cars, it is essential that the alternator be in top working condition.

About Alternators

Alternators are called so because they are alternating current generators. Based on the principle of magnetic induction, alternators use the torque provided by car engines to generate electricity. The alternating current generated is converted to a direct current and is used to charge the car battery. All the internal systems are provided power through the car battery, which is constantly replenished with charge as your car moves. An alternator consists of magnets, rotors and a rectifier mechanism. The alternator belt transfers the torque from the engine to drive the alternator.

Symptoms of a Bad Alternator

Alternator problem diagnosis is easier if you know the alternator problem signs. The simplest way of checking alternator health is checking the pilot light provided on the car dashboard. If it's off, you must get the alternator checked. Low battery voltage and overall diminished performance of electrical accessories is another indicator of a bad alternator. Signs of a bad alternator match a lot with symptoms of a bad battery. So know how to check alternator to make sure that the alternator is indeed the problem.

Repair Overview

There are specialized repair kits available for those who need to fix it on the go, when replacements are not available. Here are some repair jobs that you may need to carry out. I haven't gone into the minute details as they will vary according to the make of a car model. All that I provide is a general overview.

Replacing Alternator Belt
One of the most common repair tasks is replacing a worn out alternator belt. If it's frayed and worn out, with loss in tension, it is best that you get it replaced.

Replacing Alternator Rectifiers, Regulators and Brushes
Know how to check car battery and make sure that the problem lies with the alternator itself. If the alternator belt is also in top working condition, then the problem lies in the interior of the car alternator. Most car alternator problems arise because of a failure of internal rectifier bridge or diode that stop working. So alternator repair in this case, involves the complete dissection of the device and replacing of dysfunctional parts. You will have to remove the alternator from the entire assembly and take it apart piece by piece. You need to remove the rectifier and diode assembly from the aluminum casing and also clean out the rotor. Using a repair kit and the instruction manual provided with it, you can test and replace the faulty rectifier bridge, diodes and regulator. Check if the internal magnets are still functional. If they are not, there is no point in repairing an alternator. The only option is replacing it.

Replacing Alternator
In case the alternator is beyond repair, alternator replacement is inevitable. Refer to this guide to replace a car alternator for detailed information about how to go about it. Car alternator problems are best dealt with if you hand over the job to a mechanic.

Doing the whole repair job on your own will lessen the repair cost, but if you are not confident enough, hand over the job to a professional. When it comes to car parts like alternators, it is best to replace them altogether if there is an anomaly in functionality. The cost of alternator replacement is quite low. So you don't have to think twice before getting it replaced. If it has ended its service life, there is no point in going for repair, as you can't take chances with this device.