polorizing a Lucas voltage regulator

[Pem]

Need diagram for polarizing Lucas voltage regulator with a Lucas generator on a Ford 2000 farm tractor. 12 volt system. Thanks. Pem

 

[JMOR]

First, admonishment. Regulators are not polarized, rather generators are polarized. The misconception comes about from the 'act' often being performed at the regulator terminals. Simply remove the FIELD wire from your generator, then use a jumper wire from the ungrounded battery terminal to connect to the generator FIELD terminal for a few seconds & then remove the jumper & re-connect the Field wire to generator. Done.

 

[Mike(NEOhio)]

JMOR, not to start an argument, but I believe the jumper wire should be touched to the armature terminal. It would be marked A or G. There should be a small spark and touch it once.

 

[RickB]

(quoted from post at 19:57:03 06/26/14) JMOR, not to start an argument, but I believe the jumper wire should be touched to the armature terminal. It would be marked A or G. There should be a small spark and touch it once.

Glad you aren't starting an argument. You would be incorrect in this instance.

 

[Mike(NEOhio)]

OK, but that's the way I always did it.

 

[souNdguy]

To polarize a A circuit gen, you jumper bat hot to the armature.

this covers 8n'sanyway.

To polarize a B circuit gen, you SHOULD jumper bat hot to field.

Certaintly jumping to arm won't hurt.. and if the reg is hooked up, it still polarizes

Plus the fact that I imagine about 99% of polarizations are done without need.

 

[souNdguy]

ps. 53+ ford gens were B circuit. IE.. NAA+ that includes the lucas jobs too.

 

[Mike(NEOhio)]

Google "polarizing a generator" and you will find several articles. Every one says to jumper to the armature terminal. But who am I to argue.

 

[sotxbill]

Its is the field coil the must be magnetized so it can make the spinning armature windings generator voltage.


On A type generators, the field coil is tied to the armature coil, so the only way to polarize the field coil is to energize it through the armature lead...

On b type generators, the field coil has its own lead so you simply touch that lead to battery hot for a second, and it will put a magnetic charge on the field coils but more importantly the field shoes will then hold that charge.

This is only needed when you put in a new field coil, or new field shoes, or its a brand new generator that has not been used. Or a generator that has not been used in 10 years or so.

When you spin up a generator, the residual magnetic field on the field shoes and field coil will make the armature produce a voltage. It is this voltage that will pull in the "cutout" relay on the voltage regulator and only then it will allow it start charging the battery. The cut out relay keeps the generator from draining the battery when the engine is turned off.


It is this residual magnetisum that means you can pull start a tractor with a dead battery as long as it has a working generator. You can NOT pull start a tractor with an alternator.


So.. unless its a brand new genny or rebuilt genny or set for 20 years or more, you DONT need to polarize the generator.

 

[Bern]

JMOR is correct. Take a battery hot jumper wire and flash it to the "F" terminal on the generator. This can also be done at the regulator, but you are polarizing the generator.

 

[Mike(NEOhio)]

UNCLE

 

[Pem]

first, the gen light stayed on so not charging. Checked the Lucas gen and OK. replaced Lucas regulator and put jumper wire on the field on Gen and touched hot batt. side (not Ground side)with other end of jumper and held for about 10 sec. replaced wire to field on gen. Started tractor light went out and all seems OK. thanks for all replies. Pem

 

[JMOR]

(quoted from post at 13:42:03 06/27/14) first, the gen light stayed on so not charging. Checked the Lucas gen and OK. replaced Lucas regulator and put jumper wire on the field on Gen and touched hot batt. side (not Ground side)with other end of jumper and held for about 10 sec. replaced wire to field on gen. Started tractor light went out and all seems OK. thanks for all replies. Pem

he small of success is 'wunnerful' isn't it? :wink:

 

[RodinNS]

Don't feel bad. I'd be inclined to polarize it with a 10# sledge...

Rod

 

[Sean in PA]

The small of success :wink:

Sure beats the large of failure.

 

[JMOR]

(quoted from post at 16:50:19 06/27/14)

The small of success :wink:

Sure beats the large of failure.

e" "a" ?

 

[souNdguy]

then you found an awfully lot of articles about A circuit generators!

You are apparently arguing the fact as you keep repeatively bring up the fact that you only find/think/ about polarize thru the armature.

Just sayin...

 

[Bern]

Best advice by far for a Lucas charging system. Most of the time, the only thing it charges is the owner's wallet.

 

[RodinNS]

You got that right...

Rod