640 generator-regulator advice

nashranch

Well-known Member
When I start the tractor the amp goes to full charge..approx. 30A on the plus side but then in about 15 sec. the needle starts bouncing from 0 to +30. I take the regulator cover off and I see arcing contacts on both relays. This regulator is a brand new 12v from YT. The generator has been taken apart and cleaned up. The brushes look good ad are making good contact with the commutator. Do I take the gen. and regulator into a shop for testing or do I just go to NAPA and buy another regulator??

I do have this tractor wired Neg. Ground and have polarized the gen.( Bat. to fld. terminal at the generator)
 
(quoted from post at 16:07:05 12/20/17) When I start the tractor the amp goes to full charge..approx. 30A on the plus side but then in about 15 sec. the needle starts bouncing from 0 to +30. I take the regulator cover off and I see arcing contacts on both relays. This regulator is a brand new 12v from YT. The generator has been taken apart and cleaned up. The brushes look good ad are making good contact with the commutator. Do I take the gen. and regulator into a shop for testing or do I just go to NAPA and buy another regulator??

I do have this tractor wired Neg. Ground and have polarized the gen.( Bat. to fld. terminal at the generator)
id you remove the wire from the generator's Field terminal before connecting battery to field terminal to polarize?
 
(quoted from post at 14:51:13 12/20/17)
(quoted from post at 16:07:05 12/20/17) When I start the tractor the amp goes to full charge..approx. 30A on the plus side but then in about 15 sec. the needle starts bouncing from 0 to +30. I take the regulator cover off and I see arcing contacts on both relays. This regulator is a brand new 12v from YT. The generator has been taken apart and cleaned up. The brushes look good ad are making good contact with the commutator. Do I take the gen. and regulator into a shop for testing or do I just go to NAPA and buy another regulator??

I do have this tractor wired Neg. Ground and have polarized the gen.( Bat. to fld. terminal at the generator)
id you remove the wire from the generator's Field terminal before connecting battery to field terminal to polarize?

Nope
 
(quoted from post at 17:55:00 12/20/17)
(quoted from post at 14:51:13 12/20/17)
(quoted from post at 16:07:05 12/20/17) When I start the tractor the amp goes to full charge..approx. 30A on the plus side but then in about 15 sec. the needle starts bouncing from 0 to +30. I take the regulator cover off and I see arcing contacts on both relays. This regulator is a brand new 12v from YT. The generator has been taken apart and cleaned up. The brushes look good ad are making good contact with the commutator. Do I take the gen. and regulator into a shop for testing or do I just go to NAPA and buy another regulator??

I do have this tractor wired Neg. Ground and have polarized the gen.( Bat. to fld. terminal at the generator)
id you remove the wire from the generator's Field terminal before connecting battery to field terminal to polarize?

Nope
hat error caused over 60 amperes of current to pass through the VR's field contacts, which were designed for approximately 2 amperes. I can't guarantee that such damaged the VR, but I sure couldn't say that it didn't.
 
(quoted from post at 14:58:41 12/20/17)
(quoted from post at 17:55:00 12/20/17)
(quoted from post at 14:51:13 12/20/17)
(quoted from post at 16:07:05 12/20/17) When I start the tractor the amp goes to full charge..approx. 30A on the plus side but then in about 15 sec. the needle starts bouncing from 0 to +30. I take the regulator cover off and I see arcing contacts on both relays. This regulator is a brand new 12v from YT. The generator has been taken apart and cleaned up. The brushes look good ad are making good contact with the commutator. Do I take the gen. and regulator into a shop for testing or do I just go to NAPA and buy another regulator??

I do have this tractor wired Neg. Ground and have polarized the gen.( Bat. to fld. terminal at the generator)
id you
remove the wire from the generator's Field terminal before connecting battery to field terminal to polarize?

Nope
hat error caused over 60 amperes of current to pass through the VR's field contacts, which were designed for approximately 2 amperes. I can't guarantee that such damaged the VR, but I sure couldn't say that it didn't.
h crap... got a Napa # for new reg.?
 
(quoted from post at 15:13:56 12/20/17) I don't know NAPA number

Thank you Jesse

Getting gen. and reg tested know as we speak... the guy gen is charging good.. he is testing regulator now
 
So can we assume you have some type of 12-volt job done and using a 12-volt battery??? If so, then why ate you using a the generator instead of going al l the way with the conversion and adding a 1-wire alternator? Then you eliminate the VR altogether. Polarizing isn't the answer. Buying and adding new parts isn't a logical problem solving method without knowing the true root cause. Yes, your trusty local starter/alternator shop can bench test all your electrical components, usually for free, but, like I said, if you already have a 12-volt battery, finish the job correctly. Get a copy of WIRING PICTOGRAMS by JMOR, available for FREE download on the other N-Series tractor club web site under HOW-TO's/ELECTRICAL. The sketch for the JUBILEE should work for your 600 Model no problem. You obviously have some wiring issues.

Tim Daley(MI)
 
(quoted from post at 07:08:06 12/22/17) So can we assume you have some type of 12-volt job done and using a 12-volt battery??? If so, then why ate you using a the generator instead of going al l the way with the conversion and adding a 1-wire alternator? Then you eliminate the VR altogether. Polarizing isn't the answer. Buying and adding new parts isn't a logical problem solving method without knowing the true root cause. Yes, your trusty local starter/alternator shop can bench test all your electrical components, usually for free, but, like I said, if you already have a 12-volt battery, finish the job correctly. Get a copy of WIRING PICTOGRAMS by JMOR, available for FREE download on the other N-Series tractor club web site under HOW-TO's/ELECTRICAL. The sketch for the JUBILEE should work for your 600 Model no problem. You obviously have some wiring issues.

Tim Daley(MI)

Hey Tim... You are so right and on doing the job correctly. This is the way I bought this tractor. It has never worked right since I got it. Not sure if the PO just put in a 12v battery and ran it that way. I did repair some cobbled up wiring which did no good at all. I think my next step is to buy a one wire alternator and chuck the bad regulator in the trash and rewire accordingly. What would you do? buy a YT alternator kit or just get the alt. bracket and go to Napa and buy a 1 wire alternator?

P.S. The 12 v battery is really weak so I gotta buy a battery so I might as well go 12 V
 

12 or 5? Surely your generator man was at least good enough to be able to determine whether the generator and regulator were 6 or 12?
 
(quoted from post at 16:39:25 12/22/17)
12 or 5? Surely your generator man was at least good enough to be able to determine whether the generator and regulator were 6 or 12?

He didn't say Jesse... No matter... gonna go one wire alternator
 
(quoted from post at 19:48:40 12/22/17)
(quoted from post at 16:39:25 12/22/17)
12 or 5? Surely your generator man was at least good enough to be able to determine whether the generator and regulator were 6 or 12?

He didn't say Jesse... No matter... gonna go one wire alternator
f you can fab simple brackets you will save a lot (probably save 50-70% ) by skipping the kit approach. If not, I guess you bite the bullet. Not that I recommend this one, for sure, but this is one guy that took the "make it simple" approach. It works.
oSkbcGN.jpg
 
(quoted from post at 17:16:37 12/22/17)
(quoted from post at 19:48:40 12/22/17)
(quoted from post at 16:39:25 12/22/17)
12 or 5? Surely your generator man was at least good enough to be able to determine whether the generator and regulator were 6 or 12?

He didn't say Jesse... No matter... gonna go one wire alternator
f you can fab simple brackets you will save a lot (probably save 50-70% ) by skipping the kit approach. If not, I guess you bite the bullet. Not that I recommend this one, for sure, but this is one guy that took the "make it simple" approach. It works.
oSkbcGN.jpg

That is one Hokie setup Jesse

I just bought a one wire alternator from Napa.. part# 67127 for anybody needing a alternator. Gotta fab a bracket now
7952.jpg
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top