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Posts Tagged Alternator

DIY : OBD 1 to OBD 2 Alternator Plug Converter

Posted in My Automotive Life | No Comments »

Now-days its seem hard to find the B16a OBD1 alternator from the junkyard, luckily, B-series OBD2 alternator is compatible but not just plug and play, there a different type of socket (OBD1 = round, OBD2 = square) and luckily again, I found 5 unit B20b alternator from Honda CRV, take them all! So, the problem is, how to convert it into OBD1 car without cutting any wire? The answer is plug converter! But, unluckily, not available in my place. Give up? no.

Wait! Don’t throw away your broken heart OBD1 alternator, take out the voltage regulator.

and modify into this…with great patiently of course…

With the OBD2 alternator plug that stick at the alternator, I soldered it with the OBD1 voltage regulator socket (don’t forget to check the continuity with the multimeter before soldering) , seal with the epoxy and  cover and secure it with flexible split tubing. Here the outlet diagram.

Tadaa! 

DIY : 92-95 Honda Civic Nippondenso Alternator Whining & Carbon Brush & Bearing Replacement

Posted in My Automotive Life | 6 Comments »

When I turn on all heavy load, I mean amp load (air-conditioner, headlights (HI), fog lights, audio system, etc.) the alternator will start make whining noise like my blander machine. Inspection & suspecting;

1. I measure the battery voltage (engine at the normal operating temperature), seem normal, between 13.9 – 15.1 Voltage, depend on the load as long as it doesn’t exceed and below the range (to improve fuel economy, the alternator control system within the PGM-FI ECU changes the voltage generated at the alternator in accordance with the driving conditions). That mean my battery is under charge and voltage regulator is functioning.

2. I didn’t suspect the bearing, worn bearing will whining all the time.

3. Check the belt condition and belt deflection (5-7mm), seem OK.

4. Luckily, I have the spare alternator, take from the car graveyard, make the replacement, no more whining anymore! So, that’s mean, my alternator almost at the dead end, the whining come from electrical noise, the replacement is essential.

This is the step for alternator replacement, disconnect the cable from the battery negative (-) terminal and disconnect the alternator connector from the alternator. Remove the terminal nut and the white wire from the B terminal.

Also, don’t forget to dis-clip the white cable that attach to the alternator body.

Alternative – Make more work space by dis-clip the wire connectors. You will see clearly the adjusting nut.

Remove the adjusting nut and then remove adjusting bolt.

Jack stand the car, remove the left tire and under the alternator, there is alternator through bolt, remove it.

Loosen the belt by moving the alternator and then, remove it. Then carefully take out the alternator.

If you just want to make the new alternator replacement, just install everything back in the reverse order of removal, make sure everything in their place, and make the belting adjustment by adjusting the alternator adjusting bolt. But in my case, I need to refreshing my used alternator by cleaning, replace the bearing and the carbon brush.

At the alternator end cover, remove everything in the blue circle (This is how I use to short my text)

And again. Then remove the voltage regulator, diode and brush holder.

Again…

Inspect the slip rings, not in the bad condition…

Remove the pulley locknut (it is easy if you have an impact wrench/gun) and remove the pulley.

Loosen the rear housing (I used flat screw driver) from drive end housing.

Knock a little bit to loosen the housing.

Tap down the rotor shaft at the solid surface to split the housing, be careful, not too much. I don’t know what to call this method, but it’s work!

Remove the rotor by using the bearing puller.

Polishing the slip rings using small grits sand paper.

Check the continuity between the slip rings and no continuity between slip rings and the rotor or rotor shaft.

New set of carbon brush, make by TRIS Inc. , carbon brushes specialist company from Japan.

The old one still could be use, as long as you could see the company logo , but it is a good practice to replace alternator carbon brush that run over than 200 000 km.

Alternator brushes length : Standard : 10.5mm, service limit : 5.5mm.

Soldering set.

De-soldering.

Alternator brushes length : Standard : 10.5mm

Soldering.

Remove the bearing retainer.

This is how I remove the front bearing, using suitable socket, and hammer it out.

Comparison with the old and the new bearing (KOYO 437 vs NSK 817-101DG8B).

The better procedure to install the bearing is using the press machine.

Install back the bearing retainer.

Comparison with the old and the new bearing (NSK 399 vs NSK 6202DW).

Use the same method from the previous one to remove the old bearing, be careful with the spacer ring.

In my case I am using 27 deep length socket size.

The better procedure to install the bearing is using the press machine.

Insert back the rotor into the big and small bearing housing using hand force.

Using back 27 deep length socket size to cover the slip rings.

Hammer down the rotor shaft until the two halves close together and tighten the four nuts to fasten the casing together.

Install everything back in the reverse order of removal, make sure everything in their place, easy right?

Great link : http://www.rowand.net/shop/tech/alternatorgeneratortheory.htm ,

http://www.eham.net/articles/15113 , http://www.avweb.com/news/maint/182896-1.html