B6000 Battery Charging Problem

[KuB6000]

As mentioned in a prior thread, my battery will hardly turn the tractor over.

I measured the voltage from positive to negative terminal with the tractor off and the tractor running at high RPM. There was no difference in voltage. Just for kicks, I took the positive terminal off, and measured the voltage while running. It was 0.3 volts.

I then unplugged the dynamo from the wiring harness, and took voltages across all three wires while running at wide open throttle. They were always been 28 to 30 volts. I understand from another forum that it should be 43 volts between brown and white and 30 between brown and yellow. Is this true or false? Is 30 volts too low between B & W? These are all AC voltage measurements.

To complicate matters, someone has rewired my machine and did not follow the wiring diagram. Tell-tale clues include the fact that no wires go to the light switch, and some amateurish type splices. It wouldn't surprise me if my charging problem is related to a bad splice.

If I don't care about having headlights or a horn, what is the simplest way to wire this tractor and make it work? I think it would be a real chore to trace all of the wires and wire it up as per factory.

Is there any way to test the rectifier?

Thank you,
Chris

[KuB6000]

I thought I would update this thread with more information:

- the wiring diagram is attached. As mentioned previously, mine is wired different than the diagram.

- the brown wire from the Dynamo is hooked to one of the AC terminals on the rectifier
- the other AC terminal on the rectifier is hooked to the battery
- there are no other connections to the rectifier
- there is no continuity between any of the connections on the rectifier regardless of the polarity.
- I suspect this means the rectifier is no good.

I will confess that I still don't understand rectifiers, but based on what I know, I suspect the charging system probably never worked wired in this fashion.

Chris

[KuB6000]

I've had the new battery in it most of the day (without the charging system disabled). I've started the tractor half a dozen times. Had to use the glow plugs a few times. The battery is still reading 12.8 volts.

I think I will put the trickle charger on the tractor at the end of the day, and call that my charging system. I don't think I need anything more than that!

Chris

[Michael]

I am thinking that when Vic gets back on that you might see if he can source you a junked out B-series tractor's wiring harness and you replace the entire wire harness this summer.


When it is cold this winter and you got a bunch of snow to remove from the driveway and it is after dark that you will want a properly operating charging system with lighting to see the task at hand. In my opinion it is just the fact that having a properly working charging system is as important on your tractor as it is on your car.

Actually if you have the wiring diagram you could actually build your own wiring harness. It is not really all that difficult you just need lots of different color wires.

[Service Dept Vic]

That will work. The wiring harness is available, new, and I agree with Michael, you can build your own harness, and/or restore what's missing and defective just as easily.

[Rich C]

Hi,
The B6000 is quite simple to re-wire, you will probabaly find it eisier, if you relase the dash panel from the steering column, as most of the work is behind there.
I had to sort mine out, as a previous owner had disconnected the glow indicator and wired the starter switch in reverse. I also had to replace the battery and starter cables. I also took the opertunity to wire in rear lights and a rear working light that I soldered to the spare position on the light switch.
The Japanese type bullet conectors are available from Auto electric supliers, and it realy isn't expensive to do.
I got all the parts from this online company that ship worldwide, http://www.autoelectricsupplies.co.uk/ although you may have a suplier localy.