12Volt Alt on 24Volt System

[panoramic]

Haffi,
great pictures of your alternator addition.
I understand that you don't have pictures of your alternator bracket. Can you describe in more detail where the bracket attaches to the engine?

Thanks,
Eric

...
I installed it over the power steering pump, under the upper cooler hose and re routed the lower hose over the alternator.
I welded a extra pulley to the power steering pulley to make space for the extra belt.

Well some pics, I will try to answer any questions you might have.
...

 

[haffi]

Sorry for the late response.

No I dont have any pics of the bracket, or the way it is bolted to the engine. But I found some pics in my manual and made a little drawing maybe not the best drawing in the world but might give you some idea of how it all looks.

The bracket bolted under the bolt the arrows points at. I had to get new longer bolts.

This bracket itself was in two pieces and bolted together. It looked kind of silly because of the thin pipe from the timing gear cover. I had to make a way for that pipe trough the bracket.

As I said, this drawing is not accurate and is only to give you some ideas

I think you can see the rest on the pics in my previous post.

 

[The Dude]

I had a 12V alt on my first BJ40 with a 24V alt. I ripped it out as I felt the 12V alt was robbing much needed power from the engine under load.

I am using a 20 amp 24V->12V converter to a deep cycle bat in my HJ61. I have run heavy loads and have never ran into any issues. It is attached to a charge reg and is only on when the vehicle is running.

great set up IMO

 

[FJota]

Haffi thanks for the pics and drawings. Very helpful.

 

[haffi]

FJota

FJota, any news of this project?

 

[Dougal]

So what exactly is involved in converting a 24v vehicle completely to 12v?

The instruments should have their own voltage regulators in already (usually 5v, sometimes 10v), is it as simple as changing alternator, starter, lightbulbs and heater fan motor?

 

[denis]

I'm really not sure about the instruments, but you'd need to change the wiper motor, windshield washer pump, horns, glow plugs/ engine control system... as as well

 

[FJota]

No progress yet. Life is getting in the way. Will post info when I get started.

 

[HZJ60 Guy]

Im going to use a 40 amp converter with a deep cycle Optima as the accessory third battery, but Im installing a Balmar 70amp alternator in my truck as well.

 

[allegro9]

2nd Alternator 2H diesel

Great forum... as I am a newby found sooo many tips for my new 24v cruiser...

...just finished installing a 2nd Alternator into my HJ60 2H... I started using this kind of setup first but found a bit easier solutions as I went along - Will post a few pics in the next days.

I used a 90A Hitachi Alternator off a Holden Diesel - had to get a matching pulley machined- but only cost me a carton of piss (local currency her in the land of oz).

Instead of welding another pulley to the power steering pump I got rid of that short belt and am now running the second alternator and the power steering pump with on long belt using the oem tensioner... it works great.

Thanks for all the help I found in here... cheers

 

[FJota]

Great forum... as I am a newby found sooo many tips for my new 24v cruiser...

...just finished installing a 2nd Alternator into my HJ60 2H... I started using this kind of setup first but found a bit easier solutions as I went along - Will post a few pics in the next days.

I used a 90A Hitachi Alternator off a Holden Diesel - had to get a matching pulley machined- but only cost me a carton of piss (local currency her in the land of oz).

Instead of welding another pulley to the power steering pump I got rid of that short belt and am now running the second alternator and the power steering pump with on long belt using the oem tensioner... it works great.

Thanks for all the help I found in here... cheers

Welcome to the site. I would be interested to see you pics. I have mounted my alt (90 amp aswell). I havn't mounted my battery yet nor done any wiring.Yet. I will try for some pics later in the day.

 

[FJota]

Here are a couple pics of the alt. install,

 

[Spddude]

heres my 12v setup on a 1hz rhd 70 series with a third battery.

 

[FJota]

I am looking forward to having a reliable 12volt source.

Spddude your install almost looks factory. Nice

 

[Spddude]

I am looking forward to having a reliable 12volt source.

Spddude your install almost looks factory. Nice

Thanks, its been working great for me for over 9 months now, I run a 12v winch and a sub woofer from it.
I've developed a small stress crack in an thin part of my mount. I'll be adding an extra support to spread to load out.

Your setup looks nice and beefy, on the other hand.

cheers

 

[Cruiser-Randy]

I am using a 20 amp 24V->12V converter to a deep cycle bat in my HJ61. I have run heavy loads and have never ran into any issues. It is attached to a charge reg and is only on when the vehicle is running.

This is the direction I have been thinking. When I first got the HJ60 2H, I put a large deep-cycle battery with inverter in the back seat, behind the passenger seat. That can be charged from a 12-volt source or from a 110-volt AC source. I used this for months until I picked up a 15-amp 24v > 12v converter (plugs into lighter).

The deep-cycle ran everything (GPS, 2 cell phones, laptop, Bluetooth, LED lights, and other gadgets), and whenever I charged it on the AC mains, it was almost fully charged, lit up fully charged in a minute or so.

I have since acquired an under-hood 24>12 converter, and would also like to rewire the lighter to 12 volts (and add 3 more lighter sockets).

A new requirement came up: the 12-volt CounterAct Rust module wants 50 mA full-time (so not switched). I waited for months for the company to make me a 24-volt RustBuster but they never did, and are so bad at returning calls that I have given up on that possibility.

Some of the stuff mentioned here I do not understand, like a 1-wire alternator (what is?), the "low" battery (is that the "far" battery, electrically?).

My radio is 12 volts, has its own fuse (inline, there is no fuse in the truck for the radio), and retains its memory with no problem. By the way, is there any 12-volt fuse in the block?

What does the 24>12 box under the hood do? Is it switched?

I have plenty of deep-cycle batteries (12-volt), and it would not bother me to put one in the truck (even if it occupies unused passenger space). It can be charged from the 15-amp converter. From my first deep-cycle experience, charging while the truck is running should be plenty enough.

If the deep-cycle fits under the hood, so much the better. My deep-cycles are sealed AGM (no vapor or explosion risk).

Ideas welcomed! I had asked at the diesel shop for some ideas on how to power the rust module, but this topic has given me some new ideas to throw into that conversation (next week, as soon as I get enough vehicles started in the cold to get them over there!).

 

[Ducks]

Here are a couple pics of the alt. install,

That looks great FJota. Can you tell me where you got the parts to do that? The bracket, pulley, belt, etc.? I'm very new to all of this. Appreciate any help.

 

[FJota]

That looks great FJota. Can you tell me where you got the parts to do that? The bracket, pulley, belt, etc.? I'm very new to all of this. Appreciate any help.

I am cheap. So most of the parts came out of "Pick-A-Part". The wreckers. The alt is out of a chev wagon 90 amp. The tensionor was out of a nissan but was then modified. The double pulley was from a local alternator/starter shop. The mounting bracket is a custom job. Alt belt was just trial and error until I found the right one. It took a little effort but I am really happy with the results. Not sure if I have been of much help but thats my list.

 

[Hendrik]

All my questions anwered in one thread. Thanks guys !

 

[FJota]

Hendrik---When you are done your install, post up some pics.