Jd 70 diesel batteries question

[dick benson]

I’m helping a young man that was given a 70 diesel with pony motor.it sat for 3 years and he’s getting everything deeded up from rust.
It needs batteries. Question, will it start on one 12 volt battery?
What is the correct battery configuration ?
I’m finding different articles, one says two 12 volts
Unless I’m wrong it is positive ground, is that correct?

 

[Loosehandle]

Nope don't use 12 volt you'll fry the coils, just one 6 volt.

 

[MSD]

One 6 volt battery or your coils will be fried. Don't use a boost charger on it either or they will be fried.

 

[jd2cylman]

And positive ground.

 

[rrlund]

It was the 730 electric start that used two twelves or four sixes.

 

[Dan in Ohio]

6 V battery for sure and are getting harder to find. My go to store is RK, they have 6V batteries in stock and reasonably priced. Let us know how things go with the 70 D.

 

[55 50 Ron]

6 V battery for sure and are getting harder to find. My go to store is RK, they have 6V batteries in stock and reasonably priced. Let us know how things go with the 70 D.

Bomgaars (in north central US) has 6 volt batteries.

 

[buickanddeere]

I’m helping a young man that was given a 70 diesel with pony motor.it sat for 3 years and he’s getting everything deeded up from rust.
It needs batteries. Question, will it start on one 12 volt battery?
What is the correct battery configuration ?
I’m finding different articles, one says two 12 volts
Unless I’m wrong it is positive ground, is that correct?

in desperate need of the operator's manual and service manuals. There is a procedure to start and stop each engine with minimal wear or outright damage .

 

[David from Kansas]

I have used the liquid free 6V batteries on a couple of my tractors and I like them. Mostly corrosion free unlike the regular batteries, but they are more costly. Longevity has been very good. I even put them in a model AR which uses two six volts to provide 12V to the system and they have worked out very well.

 

[m16ty]

in desperate need of the operator's manual and service manuals. There is a procedure to start and stop each engine with minimal wear or outright damage .

Manuals can be had at numerous sources, a quick google search will give you many results. Especially lookup “Regress Press”, if they have your model available they are by far the best quality reprint I’ve found. They are on par with original JD manuals.

There are best start up and shutdown procedures for these diesels, but you won’t find that info in the manual. Always get the engine turning over with the compression release pushed, after the engine is spinning release the comp release, at the same time move the throttle lever from stop to idle.

To shut down, always shut down with compression release pushed. Move the throttle lever from run to stop, and as you are doing that hit the compression release. Leave the compression release pushed until the engine comes to a complete stop. By not using the compression release on startup can make it hard on the pony or starter. By not using the compression release on shutdown can cause you flywheel problems.