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DIY : Honda Civic/Integra 92-00 Condenser Fan Motor Carbon Brushes Replacement

Posted in My Automotive Life | No Comments »

This is could be another good preventive maintenance that we overlooked, after your car run over 150 000km, the condenser fan is very important part for the heat exchange system to help the condenser dissipation heat efficiently from hot compressed gasses supplied by the compressor, if it failed, it may cause idle problem when you turn on the air conditioning system.

First thing is to remove the fan by remove the bolt that hold the fan (blue circle).

Unplug the fan motor socket and remove the few relay (for the space) and remove the bottom right bolt…

and the bottom left side.

I also remove the exhaust manifold heat shield for the space…

and the radiator fan too! (this is a good change to replace radiator fan motor carbon brushes). By removing 4 bolts that attached the fan to the radiator.

To remove the motor from the casing and the fan blade is a piece of cake.

Here we go.

Remove the 3 locking tabs by using chisel or flat screwdriver (not proper, but it’s work!) with hammer.

Cleaning time!

The carbon brushes seem at the dead end. Unfortunately, I did not found the perfect shape for the replacement, so, I modified from the alternator carbon brushes using file (I mean…a tools file) and small grits sand paper.

Need a patient booster…

Cut the middle of the old carbon brushes wire, and cut the new one exactly same length with the old one, soldering together, put back everything, fortunately, there is spring holder pin (red circle), important : Don’t forget to release it back after you Insert the rotor.

Polishing the commutator using small grits sand paper.

Check for the worn bearing, replace if need, mine like the new one!

Reinstall everthing, important : don’t forget to stake back the motor casing locking tab using chisel or other method, I believe it will go for another 150 000km and save your precious money from buying the new motor.

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