3040 start problem

[sylvester550]

Hi.
I致e got a 3040, which won稚 start on the switch. Feeding 12 volts direct to the solenoid fires it up fine. The butterfly start switch is ok I think too. The dash lights go out when the start switch is turned, but no power goes to the starter. Is there a solenoid in the circuit, or something else I知 missing? Does anyone have a wiring diagram?
Many thanks.

 

[Tx Jim]

Welcome to TBN
May I ask what switch you're referring to when you state "butterfly"? Have you checked continuity of contacts on the neutral start switch? My guess starting circuit has an electrical relay switch but I not familiar with a model 3040.

 

[Roadworthy]

Newer tractors have a sequence of safety switches which all must be correct to start the tractor. They include the seat switch, PTO switch, possibly a clutch switch, neutral switch, etc. If you overlook one of them the starter won't engage.

 

[Harry in Ky]

Is a 3040 considered a newer tractor?

 

[Tx Jim]

Is a 3040 considered a newer tractor?

I certainly wouldn't consider a 33+ yr old tractor "newer". To my memory '80-'87 XX40 series JD tractors had no seat or pto safety switches.

 

[Harry in Ky]

I guess younger people now don't remember when tractors had electrical systems that still made sense.

 

[beenthere]

The dash lights go out when the start switch is turned, but no power goes to the starter.

Get the feeling this may be a battery cable connection that needs cleaning.. just a feeling.

:welcome: to TBN

 

[Tx Jim]

Get the feeling this may be a battery cable connection that needs cleaning.. just a feeling.

:welcome: to TBN

I agree with beenthere. JD utility tractors of that era came from factory on most of the models with battery ground(-) cable attached to battery box that after yrs of exposure to battery acid the cables could lose good ground connection between battery & starter ground connection.

 

[sylvester550]

Managed to fix it today. Thanks for your replies.
The tractor has a key switch to turn the ignition on, then a separate starter switch. I checked continuity and found no issue. The live feed from the start switch to the start solenoid goes into the back off the circuit board behind the rpm gauge on a multi pin connector and exits via another one. Took the circuit board off, and the solder around the pin was cracked all around one of the pins. Now fixed. By the way, there are 2 relays on the circuit board, one of which is part of the start circuit.

 

[Harry in Ky]

Does the starter switch you mentioned look like it was factory installed? Any positions other than off and start?

 

[sylvester550]

Factory switch; had the tractor from new. Clockwise to start, 2 positions anti clockwise for heat then start.

 

[Harry in Ky]

I'm not familiar with that style start switch. I see it in the parts lists, some of which look to be similar to many 50 and 55 series instrument panels.

Thanks for coming back and reporting on the solution. All too often people solve their problems then disappear.

 

[beenthere]

Where is sylvester550 located? Glad to hear the start problem is fixed now.