Lucas Generator output voltages

[MillvaleMurph]

Thanks to all! A new tractor would never be this much fun!?!

 

[Soundguy]

Had the same problem with my 5000. Found a main harness plug up over the fuel tank had corroded and was pulling apart. Just had to clean it and put it back together the charging circuit then worked fine. I put a cable tie around the plug so it wouldn't come apart again.

Ditto that.. those 'harni' don't have any play in them.. always seem to be just at the minimum distance needed.. never any slack... makes changing parts a pain sometimes.. I actually had to remove the mout screws on my regulator on my 5000 to slip it down and back enough to get enough play to unplug the wire terminals from it.. go figure..

soundguy

 

[Soundguy]

Thanks to all! A new tractor would never be this much fun!?!

Don't worry.. them new ones like a lil attention too now and then.. or they eventually will anyways!

soundguy

 

[glk]

Look in the service manual for your tractor.. you don't mention what model you have.. but if it's lucas.. I'm guessing 2000-3000-4000-5000 between 65 and 75.

I just rebuilt my lucas gen on my 5000.. at hi-idle I get about 14.1v.. and as high as 14.5 at pto rpm.

Use a analog volt meter.. the consumer grade digitals don't like the brush noise.

that unit is B-Circuit.. IE.. the field coil in the genny is grounded, and it expects field power controlled by the regulator.

Full field by jumping bat to field.. if that makes your battery votlage come up.. then the field circuit in the reg is bad.

If not, then bypass the cutout and jumper from armature to battery... see what you get.. you can also full field while doing this test.

CNH sells a new reg for this genny... .. the old lucas regs are prone to get dirty sticky contacts.


Polarize the genny by jumpering bat to field.


Motor test by slipping the belt off.. jump bat to field and bat to armature... if the genny spins.. it will likely charge... Most gennies that charge, will spin.. most gennies that spin, will charge.

soundguy

Sounds like you are the man with the answers....I have replaced the gen on my Ford 4000, and need to polarize. The sheet in the rebuilt gen shows a regulator type with differing suppliers, AC Delco, Autolite, Ford. The reg on my tractor has terminals labeled E, D, WL, F, B. Can you tell me which to jumper to polarize?

 

[glk]

Originally Posted by Soundguy View Post
Look in the service manual for your tractor.. you don't mention what model you have.. but if it's lucas.. I'm guessing 2000-3000-4000-5000 between 65 and 75.

I just rebuilt my lucas gen on my 5000.. at hi-idle I get about 14.1v.. and as high as 14.5 at pto rpm.

Use a analog volt meter.. the consumer grade digitals don't like the brush noise.

that unit is B-Circuit.. IE.. the field coil in the genny is grounded, and it expects field power controlled by the regulator.

Full field by jumping bat to field.. if that makes your battery votlage come up.. then the field circuit in the reg is bad.

If not, then bypass the cutout and jumper from armature to battery... see what you get.. you can also full field while doing this test.

CNH sells a new reg for this genny... .. the old lucas regs are prone to get dirty sticky contacts.


Polarize the genny by jumpering bat to field.


Motor test by slipping the belt off.. jump bat to field and bat to armature... if the genny spins.. it will likely charge... Most gennies that charge, will spin.. most gennies that spin, will charge.

soundguy
Sounds like you are the man with the answers....I have replaced the gen on my Ford 4000, and need to polarize. The sheet in the rebuilt gen shows a regulator type with differing suppliers, AC Delco, Autolite, Ford. The reg on my tractor has terminals labeled E, D, WL, F, B. Can you tell me which to jumper to polarize?

 

[Soundguy]

forget about the reg.. they don't get polarized.

remove wires from genny.. jump bat hot to field... field is the msaller wire on the lucas.. if you can;t figure out which is field.. jumper bat hot to both.. genny may want to spin.. no biggie.. then rehook wires and go...

 

[glk]

Thanks for the assist.

 

[Soundguy]

post back if ya gots any more ?'s