Farmall Cub

John I know you have done this a million times. but could you go over the Generator / cut-out Trouble shooting 1 more time and what values at which terminal. I finally started working on Mary(the 47) and thought I should keep her 6 volt
thanks

Dogman, I think there is a very good electrical trouble shooting guide on Rudi's website, but I'll give it a try.

This assumes you still have the original 4 position light switch and a generator mounted cutout, rather than the 3 position switch and a regulator (not mounted on generator).

First off with a known good battery installed and charged and the engine stopped, polarize the generator by momentarily connecting a lead from the battery side of the cutout to the generator terminal (NOT F term). A small spark is normal.

With the engine running about 1/2 throttle use an analog voltmeter to measure the voltage at the A terminal of the generator (or gen terminal of cutout). Should be 6 1/2 to 7 1/4. If voltage is lower, try grounding the F lead at the generator. If voltage comes up, then you have a problem with the wire to the light switch being bad, or the light switch being bad (sometimes rust on terminals) or the light switch not being grounded good. If the voltage doesn't come up you will need to trouble shoot the generator.

If the voltage is 7 volts or higher at the generator side of the cutout, but lower at the battery side, the cutout is not working, and needs repaired or replaced (good luck).

If the voltage is good at both sides of the cutout, but lower at the battery take readings at both sides of the ammeter, they do fail occasionally.

If voltage is good all the way through and at battery, but ammeter is not showing charge, the meter is probably bad.

I know I have probably left some things out here, but hopefully somone will add them.

Thanks John you a scholar a gentleman and a prince among men I printed them both out and will try in the a.m.

John *.?-!.* cub owner wrote:If the voltage is 7 volts or higher at the generator side of the cutout, but lower at the battery side, the cutout is not working, and needs repaired or replaced (good luck).

.

FWIW, I got a rebuilt cutout (the original Delco) from Classic Generators in TX. If anybody wants I can post the address. Don't have it installed yet but it looks like new. If you have the old cutout they may be able to fix it.

Al

Al:

Could you post as much of their contact info as possible? I will then add it to the Specialty Services section of the server.

Thanks

Rudi,

The address is:
Classic Generator
4316 Dollar St.
Midlothian, TX 76065
817-473-1448

I bought it in 2002, it's in the box waiting for the Super A. It looks like a new one. They can repair an existing cutout, depending on what's wrong with it. I sent my original, and they called back, said it was junk In 2002 my rebuilt cutout cost me $40 plus $5 shipping, which I thought was reasonable.

As I said I can't comment on how well it truly works, since it's not on the tractor yet! BUT I was very satisfied with the service I received there. Very helpful and knowledgable.

Hope this helps
Al

Thank John
it was a bad ammeter

Was it just not giving a reading, or was it open completely?

A bad ammeter would have been my last guess. They so seldom fail. Just goes to show you that any component can fail at any time and you should never ass u me .

Bigdog wrote:A bad ammeter would have been my last guess. They so seldom fail. Just goes to show you that any component can fail at any time and you should never ass u me .

If you noticed it was the last thing on my list also. We tend to think of the ammeter as monitoring the system like a piece of test equipment, not being part of it. One of the most valuable lessons I've learned in 35+ years of being an electronics technician is never take it for granted the test equipment is working correctly.

John it was not giving a reading and I worked through the list to get there as I made the wiring and the GEN and CUTOUT were off a parts tractor I figured they were bad.
This was a very abused little girl the original wire harness was all cut up and splice together it didn't have a generator and it had a vertical distributor off of a ALICE Charmers and it has been sitting out for about a year since I got it but she starts right up and charges like a trooper. even though front wheel are rotted out it still moves