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Showing posts with label test alternator. Show all posts
Showing posts with label test alternator. Show all posts

Friday, March 9, 2012

How to replace Alternator on Ford and mercury?

The procedure is similar for both Ford Taurus and Mercury Sable.


Alternator
REMOVAL & INSTALLATION
TESTING


Removal & Installation



  1. Disconnect the battery.
  2. Remove the generator B+ nut and terminal.
  3. Disconnect the generator electrical connector and position the engine wiring harness aside.
  4. Position the upper radiator hose aside and remove the upper radiator hose cradle.
  5. Remove the 5 pin-type retainers from the wire harness across the top of the radiator and position the harness aside.
  6. Rotate the accessory drive belt tensioner and position the accessory drive belt aside.
  7. Remove the upper generator nut and stud.
  8. Loosen the lower generator bolt.
  9. Remove the generator.
  10. To install, reverse the removal procedure.
  11. Tighten lower generator bolt to 35 ft. lbs. (47 Nm).
  12. Tighten upper generator nut to 35 ft. lbs. (47 Nm).
  13. Tighten upper generator stud to 71 inch lbs. (8 Nm).
  14. Tighten the generator B+ nut and terminal to 106 inch lbs. (12 Nm).

Testing



Load Test
Specific to:
Ford Taurus 2008-2009
Mercury Sable 2008-2009
  1. With the engine running, turn on the blower motor and the high beams ( or other electrical accessories to place a load on the charging system).
  2. Increase and hold engine speed to 2000 rpm.
  3. Measure the voltage reading at the battery.
  4. The voltage should increase at least 0.5 volts from the voltage test. If the voltage does not meet specifications, the charging system is malfunctioning.
    NOTE
    Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Further testing will reveal the exact component failure. Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definitive way to determine the condition of your alternator.
No Load Test
Specific to:
Ford Taurus 2008-2009
Mercury Sable 2008-2009
  1. Connect a tachometer to the engine.
    CAUTION
    Ensure that the transmission is in Park and the emergency brake is set. Blocking a wheel is optional and an added safety measure.
  2. Turn off all electrical loads (radio, blower motor, wipers, etc.)
  3. Start the engine and increase engine speed to approximately 1500 rpm.
  4. Measure the voltage reading at the battery with the engine holding a steady 1500 rpm. Voltage should have raised at least 0.5 volts, but no more than 2.5 volts.
  5. If the voltage does not go up more than 0.5 volts, the alternator is not charging. If the voltage goes up more than 2.5 volts, the alternator is overcharging.
    NOTE
    Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Further testing, which is not covered by this book, will reveal the exact component failure. Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definitive way to determine the condition of your alternator.
  6. If the voltage is within specifications, proceed to the next test.
Voltage Test
Specific to:
Ford Taurus 2008-2009
Mercury Sable 2008-2009
  1. Make sure the engine is OFF , and turn the headlights on for 15-20 seconds to remove any surface charge from the battery.
  2. Using a DVOM set to volts DC, probe across the battery terminals.
  3. Measure the battery voltage.
  4. Write down the voltage reading and proceed to the next test.

This details will help.
Thanks.





Posted by Hemant somaiya at 8:14 AM 0 comments
Labels: how to replace ford taurus alternator, installing alternator on ford, mercury alternator removal, replace alternator on ford taurus, test alternator, test mercury sable alternator

Sunday, December 11, 2011

Car Alternator Working Intermittently?

If your car alternator is not working properly,then car battery will not get properly charged.The alternator is the charging system of the car when he car is running.The cars battery has 12 volt,by this 12 volt your car runs.But when car is running,the battery voltage gets low,it drops from 12 volt to 11 volt and from 11 volt to more low volts.If more voltage drops then car will stop running or quit running at certain point.So to maintain that 12 volt of car battery,there is alternator.The Alternator is electricity-generating device that converts mechanical energy to electrical energy in the form of alternating current. Diodes rectify the alternating current into direct current.
So if you notice that your car alternator is not working properly,then also if its making any kind of noise or not.If you hear alternator making noise then
Check this link for more understanding:----

http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html


But if alternator is just not working properly,but there is no noise then the problem is alternator brushes.The Alternator Brushes block of conducting material, such as carbon, held against an armature commutator or rotor slip ring to form a continuous electrical path.But if the brushes are worn out,then it will let all dirt enter the Cars charging system and this will cause alternator to work intermittently.
On some older vehicles, if only the brushes are to be serviced, the rest of the alternator will not have to be disassembled. However, newer alternator will require removal of the unit and separation of the case. Properly identify your alternator before beginning replacement procedures.
Some alternators have brushes that can be replaced from the outside, without splitting the alternator housing.
Brushes are spring loaded.When they wear, spring tension becomes less.


SYMPTOMS:---Brushes that are too short can cause an alternator to stop working intermittently (once in a while) before failing completely.


But if alternator itself is worn out then replace it as complete assembly.
Before replacing alternator,its always advisable to inspect,test and then replace alternator.
The topics mentioned below,with help you to confirm the alternator problem.



This details will help you.

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If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

Posted by Hemant somaiya at 2:10 PM 0 comments
Labels: alternator brushes, alternator replacement, alternator works intermittently, brushes, car alternator, inspect alternator, test alternator, weak alternator

Car Alternator Bearing Makes Grinding noise?

The rotor inside the alternator rotates on bearings, normally very high precision needlebearings, and these can fail. When they do you will hear a loud grinding noise.
This is how this bearing looks:---
If this bearing is worn out,then it has to be replaced.On some car models the bearing can be replaced.But if alternator itself is worn out then replace it as complete assembly.
Before replacing alternator,its always advisable to inspect,test and then replace alternator.
The topics mentioned below,with help you to confirm the alternator problem.



This details will help you.

----------
If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.


Posted by Hemant somaiya at 1:55 PM 0 comments
Labels: alternator bearing, alternator replacement, bearing, car alternator, car alternator making noise, inspect alternator, noisy alternator, test alternator
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