Ford 740 no longer charges battery.

[ultrarunner]

Unknown to me my restored 1957 Ford 700 series was moved to do some barn storm damage repair work.

An attempt to start it was made with jumper cables and failed so it was towed.

The tractor is original 6 volt positive to frame and was jumped with 12 volt negative to frame… ouch!

I have since started the tractor to load it on my trailer but no charging registers at any engine speed… :-(

No time yet to investigate further.

6 volt battery, 6 volt generator and 6 volt regulator…

Starter works fine.

 

[TractorTech]

To start, make sure your battery is charged, then the generator needs to be polarized as the jump probably polarized it to negative ground.

If it still won't charge , you probably will need a regulator as it may be fried.

 

[ultrarunner]

Thank You

Regulator crossed my mind…

Farm had a wind event that damaged a section of the pole barn roof… no damage to tractors and buggy… they were just in the way…

Now in the big 1850 barn but in a week covered in fine dust… probably a layer of gravel would keep the dust at bay…

No shortage of small projects to tend…

 

[Roadworthy]

It's been a long time but I seem to remember a procedure for flashing the regulator to start it working when you install a new one. I don't remember how I used to do it but if you're lucky that may be the only problem.

 

[John0829]

To polarize jumper the field terminal to the Batt terminal, you can also jumper from the Field to the actual battery while the engine is off and you'll get a good solid polarization

 

[D'oh]

Thank You

Regulator crossed my mind…

Farm had a wind event that damaged a section of the pole barn roof… no damage to tractors and buggy… they were just in the way…

Now in the big 1850 barn but in a week covered in fine dust… probably a layer of gravel would keep the dust at bay…

No shortage of small projects to tend…

Yep, the Regulator doesn't like 12v. But you might be able to open it and clean up the contacts.