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Allis Chalmers Discussion Forum
Show Parts for Model:

WD wiring diagram - generator with voltage regulator

Author  [Modern View]
MT in Walford

09-16-2008 18:35:22
208.126.138.21



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Hi,
I bought a 1950 WD. The electrical system is modified a little. It has a regulator, and DOES NOT have the cut out box or custom light switch anymore. It is 6 volt positive ground. I am having trouble getting it to charge and wonder if they had it wired right. So do you all know of any wiring diagram so I can check to see if it is wired right? Thanks for your help.
Mike in Iowa




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John T

09-17-2008 06:34:05
66.244.97.31



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 Re: WD wiring diagram - generator with voltage regulator in reply to MT in Walford, 09-16-2008 18:35:22  
MT, from one of your other postings, it appears you have a 4 terminal VR with L B F up on top and usually on those the ARM/GEN is on the bottom or one side all by itself. They wire as folows:

BAT to load (NOT battery/starter) side of ammeter

L (Load) feeds hot battery voltage to loads like lights n ignition usually via a wire from it up to the BAT (input) terminal on the switches. On the 3 terminal (BAT ARM FLD) VR's that dont have the extra 4th L terminal, those laods are fed instead direct off the ammeters load terminal, same one that wires down to BAT on the VR.

F (Field) wires to the Gennys FLD Post

ARM/GEN (usually on bottom or other side by itself) wires to the gennys ARM post.

Once wired and BEFORE you start it, to avoid possible VR damage, POLARIZE the genny by momentarily flash jumping the VR's BAT terminal to the ARM/GEN or if that terminal is hard to get at, flash jump the BAT down to the Gennys ARM post and you should get a lil spark.

Once shes wired correct and Polarized per the above, if theres no charge work through my NOn Charging Troubleshooting Procedure URL pposted below.....

Make sure the belt is tight,,,,,,,Gennys is Polarized,,,,,, and BOTH the Genny and VR have good grounds........See below.....

John T

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MT in Walford

09-26-2008 17:57:45
208.126.138.21



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 Re: WD wiring diagram - generator with voltage regulator in reply to John T, 09-17-2008 06:34:05  
John,

I found out my generator is set up for the cut out with the 3 position switch. I guess it isn't made for the regular voltage regulator. Do you have a schematic or diagram of how the wiring should be for a WD Allis with a 6 volt positive ground with a coil and distributer?

Thanks

Pastor Mike


John T said: (quoted from post at 06:34:05 09/17/08) MT, from one of your other postings, it appears you have a 4 terminal VR with L B F up on top and usually on those the ARM/GEN is on the bottom or one side all by itself. They wire as folows:

BAT to load (NOT battery/starter) side of ammeter

L (Load) feeds hot battery voltage to loads like lights n ignition usually via a wire from it up to the BAT (input) terminal on the switches. On the 3 terminal (BAT ARM FLD) VR's that dont have the extra 4th L terminal, those laods are fed instead direct off the ammeters load terminal, same one that wires down to BAT on the VR.

F (Field) wires to the Gennys FLD Post

ARM/GEN (usually on bottom or other side by itself) wires to the gennys ARM post.
Once wired and BEFORE you start it, to avoid possible VR damage, POLARIZE the genny by momentarily flash jumping the VR's BAT terminal to the ARM/GEN or if that terminal is hard to get at, flash jump the BAT down to the Gennys ARM post and you should get a lil spark.
Once shes wired correct and Polarized per the above, if theres no charge work through my NOn Charging Troubleshooting Procedure URL pposted below.....
Make sure the belt is tight,,,,,,,Gennys is Polarized,,,,,, and BOTH the Genny and VR have good grounds........See below..... John T
John Ts Troubleshooting Procedure

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MT in Walford

09-17-2008 07:37:55
67.55.154.30



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 Re: WD wiring diagram - generator with voltage regulator in reply to John T, 09-17-2008 06:34:05  
John,

THANK YOU. You answer is a real help. When I get time, I will get to work on the tractor again.
Right now the starter won't turn over, SO, I have starter problems too...(I have the battery on a charger and will be checking the battery terminals and battery ground first). Thanks again, when I get the tractor started I will get to work on the Generator and Voltage Regulator.

Pastor Mike


John T said: (quoted from post at 06:34:05 09/17/08) MT, from one of your other postings, it appears you have a 4 terminal VR with L B F up on top and usually on those the ARM/GEN is on the bottom or one side all by itself. They wire as folows:

BAT to load (NOT battery/starter) side of ammeter

L (Load) feeds hot battery voltage to loads like lights n ignition usually via a wire from it up to the BAT (input) terminal on the switches. On the 3 terminal (BAT ARM FLD) VR's that dont have the extra 4th L terminal, those laods are fed instead direct off the ammeters load terminal, same one that wires down to BAT on the VR.

F (Field) wires to the Gennys FLD Post

ARM/GEN (usually on bottom or other side by itself) wires to the gennys ARM post.
Once wired and BEFORE you start it, to avoid possible VR damage, POLARIZE the genny by momentarily flash jumping the VR's BAT terminal to the ARM/GEN or if that terminal is hard to get at, flash jump the BAT down to the Gennys ARM post and you should get a lil spark.
Once shes wired correct and Polarized per the above, if theres no charge work through my NOn Charging Troubleshooting Procedure URL pposted below.....
Make sure the belt is tight,,,,,,,Gennys is Polarized,,,,,, and BOTH the Genny and VR have good grounds........See below..... John T
John Ts Troubleshooting Procedure

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steve(ill)

09-16-2008 20:23:01
74.36.162.135



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 Re: WD wiring diagram - generator with voltage regulator in reply to MT in Walford, 09-16-2008 18:35:22  
your regulator should have 4 terminals. on the bottom is the 4th. The B is battery. it goes to the amp meter, out of the amp to the battery... the F is field- goes to the generator F. the G is generator, goes to the A terminal on gen. the L is load or light. it gest voltage from the light switch on the first generation regulators. try leaving it blank. if that dont work, connect it to the B to get 6 volts... first try grounding the F to the frame to get a good ground, see if that makes it charge...when the F is grounded, put a volt meter across the F and A terminal of the generator and see if there is output.... to polarize the generator magnets, touch the G and B terminals of the reg together for 1 second, get a spark, then start motor and test.

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MT in Walford

09-17-2008 05:42:02
208.126.138.21



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 Re: WD wiring diagram - generator with voltage regulator in reply to steve(ill), 09-16-2008 20:23:01  
Steve,

Thanks for the suggestions, I will try to do the test in the next couple of days. Is the G terminal the one under the regulator? If it is hooked up right, what should it be hooked to?

Thanks

Pastor Mike


steve(ill) said: (quoted from post at 20:23:01 09/16/08) your regulator should have 4 terminals. on the bottom is the 4th. The B is battery. it goes to the amp meter, out of the amp to the battery... the F is field- goes to the generator F. the G is generator, goes to the A terminal on gen. the L is load or light. it gest voltage from the light switch on the first generation regulators. try leaving it blank. if that dont work, connect it to the B to get 6 volts... first try grounding the F to the frame to get a good ground, see if that makes it charge...when the F is grounded, put a volt meter across the F and A terminal of the generator and see if there is output.... to polarize the generator magnets, touch the G and B terminals of the reg together for 1 second, get a spark, then start motor and test.

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J Schwiebert

09-16-2008 19:23:20
209.143.28.52



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 Re: WD wiring diagram - generator with voltage regulator in reply to MT in Walford, 09-16-2008 18:35:22  
How about one thing at a time. does your regulator have four terminals? Do you have a voltmeter, if so have you check the voltage at the generator? Also maybe the generature armature needs to be cleaned. I have a trouble shooting chart for Delco's if you are interested. J.



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MT in Walford

09-16-2008 19:37:32
208.126.138.21



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 Re: WD wiring diagram - generator with voltage regulator in reply to J Schwiebert, 09-16-2008 19:23:20  
My regulator has 3 terminal on the side...
They are:

F
B
L If there is a forth one, where would it be?
Pastor Mike



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MT in Walford

09-16-2008 19:33:37
208.126.138.21



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 Re: WD wiring diagram - generator with voltage regulator in reply to J Schwiebert, 09-16-2008 19:23:20  
How do I ck the volage on the generator with the volt meter?

Yes I would be interested in the chart too.
Thanks
Pastor Mike



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