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Need a good briggs electronic guy


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#1 Tecumseh power ONLINE  

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Posted October 20, 2016 - 06:23 PM

Putting a briggs 18hp opposed twin. Into an allis chalmers 620. I got the motor for free a while back. I need to know what diodes I need or what I can do to get this to charge and run my electric pto. This is the stator I have

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#2 KennyP OFFLINE  

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Posted October 20, 2016 - 06:37 PM

What is the model & spec on this engine? Some parts lists show the diodes as a part #. Might be what you need.


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#3 Tecumseh power ONLINE  

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Posted October 20, 2016 - 06:43 PM

What is the model & spec on this engine? Some parts lists show the diodes as a part #. Might be what you need.


The engine didn't come with any tins, so I don't have much to go by besides, knowing that it is the tri circut, and that it had the diodes in the tractor harness. I would just put a voltage regulator on but not quite sure what I would have to do

#4 KennyP OFFLINE  

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Posted October 20, 2016 - 07:01 PM

Okay. Part # 392606 is the connector with diodes for the tri-circuit.

Well looks like the part # changed, but found one here.

ScreenShot058.jpg


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#5 chieffan OFFLINE  

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Posted October 20, 2016 - 07:23 PM

You can get the diodes at Radio Shack.  Their part # 276-1661.  Have to hand solder them in place and cover with heat shrink.  Or your local Briggs dealer should have that Diode link in stock.


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#6 Tecumseh power ONLINE  

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Posted October 20, 2016 - 07:27 PM

Thanks guys

#7 Tecumseh power ONLINE  

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Posted October 20, 2016 - 07:33 PM

I really appreciate the help

#8 larrybl OFFLINE  

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Posted October 20, 2016 - 08:19 PM

Late to the party, but this is most likely the diagram for the Briggs Single wire Alternator. Uses dual reversed diodes, no regulator.

  PS Don't run the engine with out the tins, it will over heat and lock up. These are Air Cooled, and the tins are very important!

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Edited by larrybl, October 20, 2016 - 08:21 PM.

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#9 EricFromPa ONLINE  

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Posted October 20, 2016 - 08:42 PM

You can get the diodes at Radio Shack.  Their part # 276-1661.  Have to hand solder them in place and cover with heat shrink.  Or your local Briggs dealer should have that Diode link in stock.

 

Just make sure you wire them correctly.They're like a 1 way valve.They only let current flow in 1 direction.

 

Most Diodes will have a Silver band on the one end.Current flows toward the silver band.

 

 

silver band Diode.jpg

 


Edited by EricFromPa, October 20, 2016 - 08:44 PM.

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#10 Tecumseh power ONLINE  

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Posted October 20, 2016 - 09:03 PM

Just make sure you wire them correctly.They're like a 1 way valve.They only let current flow in 1 direction.


Most Diodes will have a Silver band on the one end.Current flows toward the silver band.


attachicon.gifsilver band Diode.jpg

https://www.youtube....h?v=BXOS5czCb3Q

Why two diodes and not just one?

Edited by Tecumseh power, October 20, 2016 - 09:04 PM.


#11 larrybl OFFLINE  

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Posted October 20, 2016 - 09:11 PM

I have three tractors with this setup. You need both diodes, One to charge the battery and run the PTO, the other for the lights. Being a single wire stator you can omit the light diode and DO NOT use lights. The circuit works as designed, modifications are left to an electrical engineer. I have modified all of mine. https://www.youtube....h?v=5-lQILFRi4k


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#12 Tecumseh power ONLINE  

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Posted October 20, 2016 - 09:14 PM

I have three tractors with this setup. You need both diodes, One to charge the battery and run the PTO, the other for the lights. Being a single wire stator you can omit the light diode and DO NOT use lights. The circuit works as designed, modifications are left to an electrical engineer. I have modified all of mine. https://www.youtube....h?v=5-lQILFRi4k


Very good video. I guess my only question left is if I buy the diodes I need them rated for at least 12v and 10 amps right? Nice looking twin you got there too

Edited by Tecumseh power, October 20, 2016 - 09:18 PM.


#13 larrybl OFFLINE  

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Posted October 20, 2016 - 09:17 PM

This may help. https://www.youtube....h?v=uhqyuqIo30Q



#14 larrybl OFFLINE  

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Posted October 20, 2016 - 09:23 PM

6-8 amps any voltage is fine. Here are the speciation on the ones I use.

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#15 Tecumseh power ONLINE  

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Posted October 20, 2016 - 09:25 PM

6-8 amps any voltage is fine. Here are the speciation on the ones I use.


Thanks you very much. And the video was a great help. I understand what I need to do now
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