JD 40-10 diesel not charging

henryv11

Member
This is a 24V diesel i am a IHC man my friend has a 4010 that is not charging I was over and looked at it I thought I would grd. the Field terminal on gen and see if that made a difference.( Do that on the IH,s) Well the F terminal sparked with tractor not running. It seems to be energized all the time. ON a IH I would suspect the C/O contact on the VR is not opening. There is a Arm terminal right below the F terminal and on the bottom of gen another terminal with wire I could not make out what that one was. any help on this would be appreciated I was looking for a way to see if it was the gen. or vr. I posted on the JD forum got good replies just know there are a lot of smart folks here also
Thanks probably the best advice I got was to leave it alone if you do not understand it can do much damage.
 
The tractor has both positive ground 12v and some circuits as negative ground 12v, and the starter and charging system are 24v (no real ground at 24v)
With a clear wiring diagram, and solid electrical experience, working on one is complex, but not impossible. If the wiring looks shredded, let someone else
start it on fire. Jim
 
My father in law has a 4010 diesel 24 volt that we converted to 12 volt. Much simpler and every bit as good cranking performance.

Many of the kits seemed pricey and used a single wire alternator which loses the charge indicator function. I ordered a 12 volt starter and used a Delco internal regulated 3 wire alternator and salvage Ford pickup start relay that I had on hand. Flip the generator bracket and grind down the radiator end to give clearance for the alternator. I connected indicator light wire that was on old regulator to #1 pin on alternator to excite alternator when engine is started.

We only use tractor in summer and are getting along just fine with 1 Group 31 battery. I am much happier with the 12 volt conversion.
 

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