flow chart

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John *.?-!.* cub owner
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flow chart

Postby John *.?-!.* cub owner » Fri Feb 23, 2018 4:25 pm

Could someone that is better with computers than I am take these instructions and make them into a flow chart that could be saved on the forum? I am tired of typing them and afraid I will make a mistakes as many times as I have done it. Might need to expand it ot start with good spark from coil high tension lead yes or no.

Ignition switch on, check + side of coil (side going to switch) It should have voltage anytime switch is on. If no voltage work back toward switch and beyond it to find why no voltage.

If voltage at + side of coil move to negative side. Engine stops most of time with points closed, which provides a ground for coil, so no voltage there would be normal. As engine is cranked over the voltage should be on when points open and off when points close so the light flashing or meter jumping would be normal.

If no voltage at - side of coil at anytime, disconnect wire from coil to distributor. If still no voltage at - side, replace coil. If voltage at - side when wire removed, check distributor for short, either points stuck, condenser shorted, or insulator or wires shorted.

If voltage at - side of coil all the time engine is cranking, most likely burned points, but could also be bad wire between distributor and coil, or bad connection. Could even be points out of adjustment. I have seen points that had rusted and the spring broken, causing an open, and contacts that have fallen off of points.
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Don McCombs
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Re: flow chart

Postby Don McCombs » Fri Feb 23, 2018 5:50 pm

John, does this look like what you want?
EJP Flow Chart New.pdf
(30.37 KiB) Downloaded 85 times
What would you like to call the flow chart?
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staninlowerAL
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Re: flow chart

Postby staninlowerAL » Tue Feb 27, 2018 10:24 pm

I like it. Thanks John and Don.

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Stanton
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Re: flow chart

Postby Stanton » Wed Feb 28, 2018 8:43 am

John *.?-!.* cub owner wrote:Could someone that is better with computers than I am take these instructions and make them into a flow chart that could be saved on the forum? I am tired of typing them and afraid I will make a mistakes as many times as I have done it. Might need to expand it ot start with good spark from coil high tension lead yes or no.

Ignition switch on, check + side of coil (side going to switch) It should have voltage anytime switch is on. If no voltage work back toward switch and beyond it to find why no voltage.

If voltage at + side of coil move to negative side. Engine stops most of time with points closed, which provides a ground for coil, so no voltage there would be normal. As engine is cranked over the voltage should be on when points open and off when points close so the light flashing or meter jumping would be normal.

If no voltage at - side of coil at anytime, disconnect wire from coil to distributor. If still no voltage at - side, replace coil. If voltage at - side when wire removed, check distributor for short, either points stuck, condenser shorted, or insulator or wires shorted.

If voltage at - side of coil all the time engine is cranking, most likely burned points, but could also be bad wire between distributor and coil, or bad connection. Could even be points out of adjustment. I have seen points that had rusted and the spring broken, causing an open, and contacts that have fallen off of points.


Don McCombs wrote:John, does this look like what you want?
EJP Flow Chart New.pdf
What would you like to call the flow chart?


Probably should have "Distributor" somewhere in the title, since this is not for those with magnetos. Correct?
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Urbish
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Re: flow chart

Postby Urbish » Wed Feb 28, 2018 11:35 am

How about this one? Let me know if there needs to be any changes or if the wording should be more specific.
Attachments
Distributor Ignition - Diagnosing Weak or No Spark.pdf
(103.27 KiB) Downloaded 55 times

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John *.?-!.* cub owner
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Re: flow chart

Postby John *.?-!.* cub owner » Wed Feb 28, 2018 12:06 pm

Stanton wrote:......

Probably should have "Distributor" somewhere in the title, since this is not for those with magnetos. Correct?
You are correct.
If you are not part of the solution,
you are part of the problem!!!

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John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22771
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: flow chart

Postby John *.?-!.* cub owner » Wed Feb 28, 2018 12:10 pm

Urbish, it is much better than I coudl even think about doing, but the first step, rather than rejoice, needs to point to rotor, cap, wires, plugs as possible problems.
If you are not part of the solution,
you are part of the problem!!!

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Urbish
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Posts: 1396
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: flow chart

Postby Urbish » Wed Feb 28, 2018 12:48 pm

Revision A attached:
Attachments
Distributor Ignition - Diagnosing Weak or No Spark - Rev A.pdf
(105.18 KiB) Downloaded 61 times

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John *.?-!.* cub owner
Team Cub Guide
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Posts: 22771
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: flow chart

Postby John *.?-!.* cub owner » Wed Feb 28, 2018 6:19 pm

Looks pretty good to me, but needs note: For 12 volt negative ground, for 6 volt positive ground the + and - of the coil would be reversed. Or might be ahead to reverse the + and - on the drawing to make the chart for 6 volt systems since there are a lot more of them than 12 volt, and include note that 12 volt would have + and - of coil reversed. Wonder if might be ahead to include a copy of Farmall Bob's 6 volt distributor wiring diagram with a note it is his drawing as part of the how to thread.
If you are not part of the solution,
you are part of the problem!!!


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