'71 IIA Alternator

[Prez]

Hi everyone

I'm new to the forum and new to Series trucks. I recently bought a '71 Series IIA 109 that has no alternator. It is 24v, ex-military. My question is what alternator should I be putting in? Thanks for your help. I did a quick search on the forum and didn't find my answer.

[scott]

mine's just a 12v civy but a quick google turns up a lot of "small case 24 v alt". seems mostly for marine use. http://mygenesreconnected.com/BALMAR/Balmar%2080.htm

[yorker]

You want what was originally there or something that is cheaper and easier to find?

http://www.expeditionlandrover.info/Delco_Alternators.html

google or search on eBay for "24v 10si"

Also somewhere on one of these boards there was someone giving away a 24v LR alt- I can't remember where though.

[Prez]

Thanks Scott, Yorker. Anyone want to weigh in on converting it from 24v to 12v? Worth it. How easy? etc.

[Lalo88DK]

I have a 24 volt ex-mili, mine has got the small 40 amps alternator.
I have recently also fitted a 12 volt alternator. so now I have both 12 volt and 24 volt, very nice, It's my intension to convert bit by bit, when the 24 volt parts need replacing (if they can't be repaired) 24 volt parts are very expensive, but it works much better and you don't have the hassle with fires in the electrics.
The original 24 volt alternator. is not cheap, but you can find them in the UK at Paddocks, and P.A.Blanchard or on Ebay.

http://www.paddockspares.com/scp/SERIES/Ex-Mil_2.25P_Engine_Parts.html

If you want to convert to 12 volt You may find this link help full : http://www.winwaed.com/landy/mil/military.shtml

Converting does requires some work and some parts:

Horn
Bulbs (complete set)
Alternator
Screen wash motor (if fitted)
Fuel gauge
Water temp. gauge
Starter motor
Fuel gauge sender unit
Fan belt
Bracket for fixing alternator
Wiper motor
Water pump fan belt pulley
Heater motor
Flasher unit
Fan
(Coil)
(Spark plugs)
(Distributor)
(Plug leads)

Some the above parts may have been fitted with a resistor and are actually 12 volt parts, mine for instance has a 12 volt wiper motor 12 volt ignition system all factory fitted with a small resistor.

[jgkmmoore]

12V conversion from 24V....DO IT.......

DO IT ! First thing. Look in tech areas of 'forums' for '12V GM conversion'. The 'one wire alt' by GM is very common (Safeway,etc) and limits the conversion problems. It's a bit of time consuming head scratching, but if you have basic electrical stuff down, shouldn't be a problem. As you get toward the end, put some relays on your high consumers (headlts, driving lts,wipers,horn), and get some fuses inline wherever you can (in the open). Get rid of the ammeter, and replace with voltmeter. Peace of mind, and many fewer chances of a smoke show. Landys like smoke shows.
**********DISCONNECT YOUR BATTERY*********while you are working on the elec stuff, and take off rings and metal band watches.
These can burn you very badly if shorted. Ask me how I know.

You will NOT regret the conversion to 12V. Not a whit.

[JimCT]

Amperage

going from 24V to 12V doubles the load on the wiring. 10amps become 20amps for the same thing. And rovers are not known for the most robust wiring harnesses.

[greenmeanie]

going from 24V to 12V doubles the load on the wiring. 10amps become 20amps for the same thing. And rovers are not known for the most robust wiring harnesses.

Excluding the specialist 24V section for the generator and IIRC the dizzy the wiring harness for all the usual bits is the same for 12 & 24V trucks. As you state the increased current may find issues that were not apparent before but the wire gauge will be fine.

If your truck has an IR switch wire round it if you do a halogen conversion as it is not up to the load.

[SeriesShorty]

Shucks, I just gave my 24v 90amp generator away to the counter dude at O'reilly's when I bought my Delco 10si, otherwise I would have sent it up your way. He had an idea to turn it into a home generator and I was tickled at that thought, so I dumped the hunk of metal at his door. I'll have to check back with him to see how it's coming along.