Thread: Td5 alternator

Hi mturri,

sorry to bother you, but this is driving me crazy!!!
I removed my alternator from a defender td5 ('2000), and I realised that the bearings have to be replaced.
I measured with the caliber the internal bearings (the one on the vacuum pump is in very good condition), and I measured:

Koyo 945 (grey; toward the vacuum pump) OD=40mm, ID=17mm, thk=12mm
Koyo 279 (brown; adjacent to the brushes) OD=35mm, I<d=15mm, thk=12mm

I checked on the koyo website but it appears that there is no part corresponding to the numbers on the bearings I removed from the alternator.
Moreover, on the koyo website I cannot find any bearings that fit mine!

I browsed the entire planet! I even tried the planets close to this f....g globe! but no luck.
I hope that you had more luck than I have and maybe you could give me any help where to find these bloody bearings!

Thanks a lot!
David

Originally Posted by mturri

The bits of information I've collected over the years:

Td5 alternator part numbers:

Nippon Denso 100213-2391 (OEM)
Nippon Denso 100213-2530 (OEM)
Bosch 0.986.046.541
Hella 8EL 738 079-001
Lucas Electrical LRB00369
Chrysler 38522267F
Delco Remy DRA3856


Regulator
Nippon Denso 126000-2500
Common to some Caterpillar alternators, was in one occasion able to source through local Cat distributor

Lip Seal (alternator to vacuum pump)
Measures 17 mm x 30(37) mm x 8 mm
Nippon Denso 081103-0080
Common to a few Toyota alternators, can use Toyota p/n 29341-64130

Bearings
Double sealed (2RS) mid temp
15 mm x 46 mm x 14 mm (bore x OD x Width)
e.g. Koyo 949100-3360

Brush Box & Brushes
No p/n but have sourced from eBay
http://www.ebay.co.uk/itm/DEFENDER-DISCOVERY-SERIES-2-2-5-DIESEL-TD5-ALTERNATOR-REGULATOR-BRUSHBOX-/290631807647


Rgds
Matt

Originally Posted by dado.mago

Hi mturri,

sorry to bother you, but this is driving me crazy!!!
I removed my alternator from a defender td5 ('2000), and I realised that the bearings have to be replaced.
I measured with the caliber the internal bearings (the one on the vacuum pump is in very good condition), and I measured:

Koyo 945 (grey; toward the vacuum pump) OD=40mm, ID=17mm, thk=12mm
Koyo 279 (brown; adjacent to the brushes) OD=35mm, I<d=15mm, thk=12mm

I checked on the koyo website but it appears that there is no part corresponding to the numbers on the bearings I removed from the alternator.
Moreover, on the koyo website I cannot find any bearings that fit mine!

I browsed the entire planet! I even tried the planets close to this f....g globe! but no luck.
I hope that you had more luck than I have and maybe you could give me any help where to find these bloody bearings!

Thanks a lot!
David

Any good bearing shop should be able to cross reference the Koyo number to another brand.
Take them with you if you can too.
Plan B is call into a auto-electrician with the bearing, they have some in stock.

Hi Kylie,

thank, I have alreday called Koyo, and they told me to call Bearingwholesales, they have their bearings. I went today to the Sunshine store and got the right bearings.
Now the problem is the lid seal, it is bloody hard to find. Tomorrow I will stop by at the Toyota dealer in Elizabeth street near the Vic Market to ask for the part.
The other option is to buy it online from US, but it will take 20 days, and the price is 15$, but 54$ for the shipping!!!!
Let's see.

Done!
Now it is working fine....like new!
check it out....https://www.dropbox.com/s/q3ihgqk75o...20tutorial.pdf

Very comprihensive and well done tutorial I'm sure many discovery owners will use this.

Hi,

Resurrecting this thread - I'm looking to improve the output voltage of my alternator (it sits at about 13.8 - 14v when warmed up). The alternator is original and I've given it a good clean an installed new brushes but the regulator is original.

Would this one do the job? 14.7V apparently.

IN249 Voltage Regulator for Nippondenso ( Denso ) type Alternators - 12 Volt, 14.7 Volt Set Point

PS: Reason is my drive to work is only 20 mins and the 2 batteries don't often get a big charge so would like a higher voltage from the alternator.

I found a source for the slip rings from a place called Baxters - the part number is NSR1.
$15 each - very easy to replace - just be careful removing the old epoxy from the solder joints.

Slip Ring Nippondenso 8.8 X 14.5mm

Hope this helps.

Originally Posted by simonmelb

Hi,

Resurrecting this thread - I'm looking to improve the output voltage of my alternator (it sits at about 13.8 - 14v when warmed up). The alternator is original and I've given it a good clean an installed new brushes but the regulator is original.

Would this one do the job? 14.7V apparently.

IN249 Voltage Regulator for Nippondenso ( Denso ) type Alternators - 12 Volt, 14.7 Volt Set Point

PS: Reason is my drive to work is only 20 mins and the 2 batteries don't often get a big charge so would like a higher voltage from the alternator.

Have any luck with this Simon ??

Listing says "Discovery 2.5L 1998-ON"

Would be good for charging the kamper batteries (which really need a 14.7v absorption charge).
My new alternator (Denso 14v) can start off at 14.6-14.8v baut after a while drops back to around 14.1v-14.2v and sometime later can drop to 13.8v-14.0v ....

... what's the likleyhood that this 14.7v setpoint would start off cold at over 15v !! ?? .... and progressively drop back to 14.7v ... could be a problem ... maybe a 14.4v setpoint would be better.

Did you pursue it any further ??