Converting ww2 mb wills jeep from 6 volt to 12 volt

[Blackpowder44 (RIP)]

no need to change dynamo, I have converted all my jeeps to 12v. and as long as your dynamo is putting out about 13.5 volts it will work o.k. all you need is a regulator from a morris 1000 or similar. a true 12volt coil and change the bulbs. My jeeps have been run like this for 30 odd years. john

[Little Jo]

John

Thank you for the advice, makes things easier when someone has already done the conversion and allis working OK.

Cheers

Little Jo

[ozm29c]

This may help too. Circuit for the fuel gauge. Apologies for the grainy appearance but the schematic should be OK to read.
Cheers
John W.

[Lynn Eades]

There is some thing to do with earthing. If it is sorted out you will fix the hard starting thing . I suggest you go to the G503 site, and do some research in the technical section.

[Little Jo]

Originally Posted by Lynn Eades

There is some thing to do with earthing. If it is sorted out you will fix the hard starting thing . I suggest you go to the G503 site, and do some research in the technical section.

Lynn

Thanks for that I had a qick look at the site and as a novice, this site will be of great help.

Cheers

Little Jo

[derk derin]

Hi Little Jo,
I bought a Ford GPW jeep last fall that had already been converted to 12 volts with an alternator fitted.The jeep sure starts nice but have not driven it much yet.One positive thing going to 12 volts is the fact that the headlights in 6 volt are drying up from what I have been told but the 12 volt ones are still available and reasonably priced.Here are some pictures of what I have in my jeep if it helps in any way;


I am glad you brought up this subject as I have to figure out myself what to do with the fuel guage to make it work on 12 volt system and anything else that has to be converted.
Regards,Derk.

[Little Jo]

Originally Posted by derk derin

Hi Little Jo,
I bought a Ford GPW jeep last fall that had already been converted to 12 volts with an alternator fitted.The jeep sure starts nice but have not driven it much yet.One positive thing going to 12 volts is the fact that the headlights in 6 volt are drying up from what I have been told but the 12 volt ones are still available and reasonably priced.Here are some pictures of what I have in my jeep if it helps in any way;

I am glad you brought up this subject as I have to figure out myself what to do with the fuel guage to make it work on 12 volt system and anything else that has to be converted.
Regards,Derk.

Derk

Thank you for the update info and the pictures. I was wondering what type of alternator you have and if you had any modification made to install it in place of the large old 6 voly generator, The photo clearly shows how the alternator lines up with the water pump pulley, that was one thing I was wondering, how to line it all up, I also noted the fan belt looks as if it is not as wide as the original.

I supected starting would be better and I also think I will get better lighting for night driving. Could you advise the type/brand of alternator you have and also what type/brand 12 volt coil you have on your vehicle.

Thanks mate

Little Jo

[Little Jo]

Originally Posted by ozm29c

This may help too. Circuit for the fuel gauge. Apologies for the grainy appearance but the schematic should be OK to read.
Cheers
John W.

John

Thank you for the fuel guage information. I need all the help I can get.

Cheers

Little Jo

[Mike K]

Originally Posted by ozm29c

This may help too. Circuit for the fuel gauge. Apologies for the grainy appearance but the schematic should be OK to read.
Cheers
John W.

That's a page from my old fuel gauge article. It did the rounds in a few MV mags , Army Motors and the MVT mag Windscreen ... and the Dutch KTR mag .... translated too !

MIKE

[ozm29c]

Originally Posted by Mike Kelly

That's a page from my old fuel gauge article. It did the rounds in a few MV mags , Army Motors and the MVT mag Windscreen ... and the Dutch KTR mag .... translated too !

MIKE

G'day Mike,
Valuable articles like this example seem to live on forever. I scanned this one years ago just in case I needed it for future reference. Well done Mike and thanks.
Cheers
John W.

[Blackpowder44 (RIP)]

Another tip for you to consider. In ths spring of this year my son filled up his diesel van with £50 worth of petrol. This was drained out and I descided to try running my jeep on it. Jeep ran perfectly, some smoke and diesel smell until the engine became hot. The advantage of using this mix is- upper cylinder bore is lubricated by unburnt diesel, fuel costs nothing from your friendly garage, valve stems also lubricated. Downside, If your jeep is left standing for a couple of days the petrol in the carb evaporates and when starting the diesel/petrol mix will create a smoke screen until again the engine heats up.Last but not least, check your oil level on the dip stick. A certain ammount of diesel will not be burnt up in the firing process and will find its way down into the sump, thereby thinning the oil in the sump and you will find the level on the dipstick rising. Time to drain out the oil and replace. I have done about 1200 miles before changing the oil and I consider this to be cheap motoring. Do not be put off trying this because as long as you are aware of the sump oil thinning you wont come to any harm, happy jeeping. John.ps, forgot to mention, you also get better compression because of the diesel residue sitting on top of the pistons.

[Little Jo]

John

The diesel story is very interesting. I was having a conversation a short while back with a couple of Club members regarding the Octane level in unleaded petrol that we can only purchase now, if I remeber correctly, they said the old leaded fuel we used to purchase used in our jeeps burned around 70 - 75 octane and since the introduction of unleaded fuel the lowest we can get is 90 octane, to bring this down to a resonably correct burning levels in your jeep it was suggested to add a cup of diesel to the fuel whenever you filled up the tank. Sounds fair to me.???

Cheers

Little Jo