3020 starter

[waynesch]

i have an earlier jd 3020 with powershift. when i have the positive and negative cables attached to the starter and i touch the positive cable to the battery the starter engages. i do not have any other wires attached to the starter when doing that. it is a 24 volt system with a positive ground. i have replaced the starter thinking that was bad and the new one does the same thing. i have checked both cables and they are in good condition.

 

[Bob]

Disconnect the (yellow?) wire from the "S" terminal on the starter solenoid, and try it again and post back.

 

[D-]

Try disconnecting the little wire from positive starter post to solenoid.
Be sure tran is in PARK and throttle is in shutoff position then jump
from negative post to outer solenoid terminal.

 

[buickanddeere]

(quoted from post at 09:17:18 08/30/15) i have an earlier jd 3020 with powershift. when i have the positive and negative cables attached to the starter and i touch the positive cable to the battery the starter engages. i do not have any other wires attached to the starter when doing that. it is a 24 volt system with a positive ground. i have replaced the starter thinking that was bad and the new one does the same thing. i have checked both cables and they are in good condition.

It was not positive ground when that 3020 left the factory. It wasn't negative ground either.
Is there potential on the wire running from the key switch to the solenoid ?
This maybe a good time to consider a 12V starter and wiring harness from Agri-Services.

 

[Tx Jim]

(quoted from post at 19:44:59 .

It was not positive ground when that 3020 left the factory. It wasn't negative ground either.

This maybe a good time to consider a 12V starter and wiring harness from Agri-Services.[/quote]

I agree JD 24 volt starter/charging system is not grounded but the fuel gauge & lights are grounded.

As easy as a 24 volt wiring harness is to convert to 12 volts if 24 volt harness is good I wouldn't change it out too a new 12 volt harness if converting tractor from 24V to 12V

 

[M-MAN]

Fellers we are getting a little carried away with the 24v ground issue. Yes we all call it ground but in reality there is no such thing on a tractor no matter if it's 6v, 12v, or 24v. What it boils down to is we've all been around long enough to know what folks mean. There are two cables on a battery and they both have to go somewhere.

 

[Tx Jim]

(quoted from post at 07:38:23 08/31/15) Fellers we are getting a little carried away with the 24v ground issue.

Carried away in what fashion? JD 24 volt starter,generator & volt regulator are isolated from tractor frame.

 

[buickanddeere]

(quoted from post at 08:38:23 08/31/15) Fellers we are getting a little carried away with the 24v ground issue. Yes we all call it ground but in reality there is no such thing on a tractor no matter if it's 6v, 12v, or 24v. What it boils down to is we've all been around long enough to know what folks mean. There are two cables on a battery and they both have to go somewhere.

Please show us the current path through the chassis/ground while the engine is cranking or while the batteries are being charged .