New Holland TC 30 won't start

[racer86y]

It had not started all week.I went out friday afternoon and it fired right up.Ran it all day friday and saturday.Went out to use it today and it won't spend over again.I am lost

 

[K5lwq]

Am I understanding correctly that when it doesn't Start you are saying the starter does not engage?

If so, I would look closely at the seat switch or one of the other safety switches. Try bouncing in the seat and then start.

 

[fried1765]

When it cranks over and starts it runs great

Consider bypassing the seat switch.

 

[WanaBFarmer]

I am having a similar issue to my tractor and have traced it to the electrical system not operating the fuel shutoff solenoid when the starter is engaged. Started out as an intermittent issue but became a permanent problem.
I jumpered the solenoid right to the battery and fires right up. Once it is running the normal feed to the solenoid keeps it open. (note you have to remove the jumper or nothing shuts the tractor down, including the safety switches)

I have not traced it to the specific component that is not working properly but here is what I did find.
Battery is at 12.8 V when key is on. 14 V when tractor is running.
Drops to 10.7 V when cranking but that does not seem odd given the oomf the diesel needs to turn over.
but....
I'm only getting 9.6 V at the key switch when cranking and 8.7 to 9 going out of the key switch. My guess is this is not enough for the "fuel control unit" or the fuel shut off solenoid to open. But need a wiring diagram to go further.
For now I'm putting in a jumper switch to power the shutoff solenoid directly from the battery to start the tractor.

 

[racer86y]

I am having a similar issue to my tractor and have traced it to the electrical system not operating the fuel shutoff solenoid when the starter is engaged. Started out as an intermittent issue but became a permanent problem.
I jumpered the solenoid right to the battery and fires right up. Once it is running the normal feed to the solenoid keeps it open. (note you have to remove the jumper or nothing shuts the tractor down, including the safety switches)

I have not traced it to the specific component that is not working properly but here is what I did find.
Battery is at 12.8 V when key is on. 14 V when tractor is running.
Drops to 10.7 V when cranking but that does not seem odd given the oomf the diesel needs to turn over.
but....
I'm only getting 9.6 V at the key switch when cranking and 8.7 to 9 going out of the key switch. My guess is this is not enough for the "fuel control unit" or the fuel shut off solenoid to open. But need a wiring diagram to go further.
For now I'm putting in a jumper switch to power the shutoff solenoid directly from the battery to start the tractor.

This is exactly what i thought was happening.So for now thats what i am gonna do.If you find out what causes it,please reply and thanks a lot.

 

[lman]

I had a similar problem with my NH 1530 and I thought I had a problem with the ignition or wiring. I decided to replace the battery and all my problems were gone.

 

[racer86y]

I had a similar problem with my NH 1530 and I thought I had a problem with the ignition or wiring. I decided to replace the battery and all my problems were gone.

My new Duralast battery is only a year old but i think i will have it checked

 

[Strummer]

Mine was doing something similar. Changed out the ignition switch . Fixed my problem. Took the old switch apart . Was all corroded up .

 

[racer86y]

Mine was doing something similar. Changed out the ignition switch . Fixed my problem. Took the old switch apart . Was all corroded up .

Mine turned out to be defective cable end.Wasn't getting tight enough

 

[jhonygee]

when i had a similar problem i went to the service and they changed the battery.