Need Help HD6B Electrical

[ACEd]

I have a 1974 HD6B s/n 40M25019 - it has run fine since I got it about 4 years ago - though the charging system has never worked.

On digging into another problem - starter? - this year, I find it has a late Alternator and is set up with a Negative Ground - all the books I can find show the HD6B has a Generator with Positive Ground.

The HD11B and others show an Alternator and Negative Ground after about 1970. I was wondering if the HD6B ever had a Negative Ground system with or without an Alternator - or did someone convert it?

And if it was converted - what is best way to get Alternator functioning and what else am I likely to have to deal with - again - tractor has always started as long as batteries were charged.

Thanks, Ed

 

[NIK O.]

GET ON ACMOC OR ACME, ANT CAT MACH ENTHUSIAST, ASK HECTOR GEMME/GEMDOZER, H.D. WIZARD @ QUEBECK.. BE BLESSED, THANKFUL, PREPARED, NIK CAT RD4 1936

 

[ACHD21A]

I had a 5 many years ago and I think it was positive ground. I think all alternators are negative ground. A starter there in no difference, will spin the same direction either polarity. You are ok. Who made the alternator. If is a delco with built in regulator, you can probably find one at Napa. Go thru one every several years because heat from exhaust manifold fries the regulator. Just get a rebuilt 40 amp and change pullies and back in operation. Bob