Please help

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fletchman919
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Re: Please help

Postby fletchman919 » Wed Jun 19, 2019 6:06 pm

On my 3 position starter switch I have wired as follows:

The BATT on the switch is going to the L on the regulator

The IGN on the switch is going to the coil.

The SOL on the switch is going to the small terminal on the solenoid.

Is this correct? I have 12.34 volts on ALL 3 of the terminals on the switch which doesn't seem right to me.

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fletchman919
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Re: Please help

Postby fletchman919 » Wed Jun 19, 2019 6:13 pm

I used the bottom diagram to go off of.
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fletchman919
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Re: Please help

Postby fletchman919 » Wed Jun 19, 2019 6:37 pm

I tried jumping the solenoid and the solenoid made a rapid series of loud clicking noises. The engine did turn over, but very slowly. I ran a 14 guage wire from the ground on the battery to the mounting bolt of the starter/generator to see if that would help but it didn't.

Also, I have bypassed the ammeter to eliminate it from being a problem.

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fletchman919
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Re: Please help

Postby fletchman919 » Wed Jun 19, 2019 6:53 pm

I jumped the solenoid again but touched the two large posts and the engine cranked over good.

I'm so close I can smell it. Lol

Larry B
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Re: Please help

Postby Larry B » Wed Jun 19, 2019 7:29 pm

To get engine to turn over you need the following wiring.
Thick wire from battery + to big terminal on solenoid.
Thick wire from other big terminal on solenoid to A term on starter/generator.
If solenoid has 2 small terminals one gets connected to ground and the other to S or start terminal on the key switch. Original wiring had this going through the safety clutch and PTO switches.
If solenoid has one small terminal then mounting bracket needs to be grounded and the single terminal to the S or start terminal on the key switch.
The key switch should have battery voltage on the B or Batt terminal.

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fletchman919
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Re: Please help

Postby fletchman919 » Wed Jun 19, 2019 8:32 pm

Thank you so much Larry! I will try that tomorrow and post the results.

Larry B
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Re: Please help

Postby Larry B » Wed Jun 19, 2019 9:46 pm

What type of starter switch do you have? A key switch with 3 posituons OFF/ON/START ? If so in the off position you should have battery voltage on the batt terminal and no voltage on the other terminals. When you turn it to the on position you should get battery voltage on the IGN terminal and nothing on the SOL terminal. Third position should be spring return to the ON position. When you turn third position you should get battery voltage at the SOL terminal and IGN terminal.
If you have a single small terminal on the solenoid be sure the mounting frame of the solenoid is grounded well. It is part of the circuit for the coil in the solenoid.

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fletchman919
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Re: Please help

Postby fletchman919 » Thu Jun 20, 2019 6:05 am

Yes sir, I have that type of switch. So I have something not right because I'm getting voltage to all 3 terminals.

Also, when I jumped the solenoid, I pulled a plug wire and didn't see any spark. I was in a hurry and couldn't check real well by myself, but I don't think it's getting spark. Probably because I have something wired wrong I'm guessing.

I appreciate everyone's help! I can never understand electric very well and I always have to be walked through issues.

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fletchman919
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Re: Please help

Postby fletchman919 » Thu Jun 20, 2019 6:53 am

Was just thinking about safety switches in the clutch and pto. I'm not sure if my Cub has those or not but I don't see wiring for them. Are the switches visible without removing anything?

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fletchman919
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Re: Please help

Postby fletchman919 » Thu Jun 20, 2019 7:55 am

Another question I just thought of...If the solenoid is wired up backwards, would it still work properly? I'm wondering if that could be a problem...

outdoors4evr
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Re: Please help

Postby outdoors4evr » Thu Jun 20, 2019 12:51 pm

It seems as if you are more interested in hotwiring than fixing the wiring right now.
To run the engine, you will need to supply a small wire +12v to the coil and a heavy gauge wire +12v to the starter solenoid. Any safety circuits are built in line with the key which is supposed to provide power to the coil.
Note: Any shorted wires in the system will cause great issues. I'd highly suggest going through the wiring and getting it wired correctly.

Before you do this, make sure you have primed the oil pump! Search for instructions on this forum. Same procedure as the cub.
Have you verified that you have spark at the plugs? Need to work back from there. Spark, Fuel, Timing
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fletchman919
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Posts: 104
Joined: Sun Oct 03, 2010 9:44 pm
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Tractors Owned: 1948 Farmall Cub
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1966 Sears Suburban 10
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1963 Cub
1969 Cub Lo Boy

Re: Please help

Postby fletchman919 » Thu Jun 20, 2019 2:12 pm

outdoors4evr wrote:It seems as if you are more interested in hotwiring than fixing the wiring right now.
To run the engine, you will need to supply a small wire +12v to the coil and a heavy gauge wire +12v to the starter solenoid. Any safety circuits are built in line with the key which is supposed to provide power to the coil.
Note: Any shorted wires in the system will cause great issues. I'd highly suggest going through the wiring and getting it wired correctly.

Before you do this, make sure you have primed the oil pump! Search for instructions on this forum. Same procedure as the cub.
Have you verified that you have spark at the plugs? Need to work back from there. Spark, Fuel, Timing


Thank you! You are pretty much correct. I am bypassing what is not needed to eliminate them from the equation. The safety switches don't appear to be wired up so I don't think they shouldn't affect anything.

I will try to check for shorts. I plan on wiring it up propeerly once I get it all figured out.

Thanks so much for the help!

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fletchman919
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Posts: 104
Joined: Sun Oct 03, 2010 9:44 pm
Zip Code: 45693
Tractors Owned: 1948 Farmall Cub
1966 Colt 2712
1966 Sears Suburban 10
1969 Sears Super 12
1972 Sears SS15
1963 Cub
1969 Cub Lo Boy

Re: Please help

Postby fletchman919 » Fri Jun 21, 2019 7:23 pm

Hopefully this will help me. Wish this was a sticky. Took me a week to find it. Lol!
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Glen
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Re: Please help

Postby Glen » Mon Jul 15, 2019 8:47 pm

Hi,
Below is the 154 LoBoy owner's manual. It has lots of info about operation, maintenance, and lubrication. The experts on here recommend people read it. There is a table of contents beginning on page 1. The wiring diagrams and info are on pages 28, 29, and 30.
The numbers on pages 28 and 29 are explained on page 30. :)

http://farmallcub.com/rudi_cub/www.clea ... index.html

The wiring diagrams look easy to follow. Look at them on a computer with a screen bigger than a phone is probably helpful too.

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MikeEyre74
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Re: Please help

Postby MikeEyre74 » Tue Jul 16, 2019 8:29 am

fletchman919 wrote:Thanks to all of you!

It's frustrating because I know someone with the right knowledge could have it uo and running in a hour or so.

Thank you all again!


YOU are going to be that someone by the time you’re done with this.

I’m usually in the same boat as you and have to call “my smart friend” to help me fix stuff electrical... I can handle the mechanical stuff myself but electrical gives me fits. :D
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