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Jd 7420 tractor started up then just died. Turns over fine,

Jd 7420 tractor started...

Jd 7420 tractor started up then just died. Turns over fine, but won't fire. Code on the dash shows 301143 and 31 BIF. Has not done this before. Thanks

Mechanic's Assistant: What is the complete model and serial number of your machine?

John Deere 7420

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

Serial number RW7420R036548. Yes I am fixing this myself. Checked all fuses.

Mechanic's Assistant: Anything else you want the equipment mechanic to know before I connect you?

Fuel system fuses were fine but replaced anyway.

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Answered in 12 minutes by:
4/6/2018
Mechanic: Wayne, Journeyman replied 4 years ago
Wayne
Wayne, Journeyman
Category: Agriculture and Farm Equipment
Satisfied Customers: 17,945
Experience: 34 + years as a mechanic
Verified

Hi, I’m Wayne.

I will be assisting you with this issue today.

Your code is for PreHeat time still remaining

disconnect the battery for 10-15 minutes see if the code will clear

let me know

Wayne

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Customer reply replied 4 years ago
Disconnected battery for 15 minutes. Let preheat then tried starting. Would not fire.Still had the same code on display.
Mechanic: Wayne, Journeyman replied 4 years ago

Thank you for the response

you have the JD 6 cyl diesel, check for 12.3 volts on the injection pump

fuel shut off solenoid

let me know

Wayne

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Customer reply replied 4 years ago
No voltage at the injection pump
Mechanic: Wayne, Journeyman replied 4 years ago

Hi

Thank you for the response

OK the fuel shut has no power, you replaced the fuse

that says that a safety switch is cutting off power to the solenoid

locate your low oil pressure switch, will be around the oil filters, disconnect the wires and check for voltage again. Then do same with high water temp sensor

Wayne

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Customer reply replied 4 years ago
Took the wire plugs loose from the oil sensor and water temp sensor. turned the switch on and checked for voltage at the fuel solenoid. Nothing there. But I do have 5 volts at each of the oil sensor wire plug and water temp wire plug.
Mechanic: Wayne, Journeyman replied 4 years ago

HI

Yes they are low voltage, 5 is normal

let me take a look in the file hang tight a bit

Wayne

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Customer reply replied 4 years ago
Rechecked the two fuses. ok. Worked the shift lever, pto button and seat. Didn't actually remove the switch plugs. Still no voltage at injection pump solenoid.I have to leave now to deliver dozer fuel to my son. Is there a way I can contact you later?
Mechanic: Wayne, Journeyman replied 4 years ago

Hi

Yes ,just come back here

Wayne

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Mechanic: Wayne, Journeyman replied 4 years ago

Morning

Just following up with you

Did my answer help you ??

Wayne

Ask Your Own Agriculture and Farm Equipment Question
Customer reply replied 4 years ago
Sorry Wayne. I had a busy and bad week. I put the tractor project on the back burner, but still haven't fixed it. Could there be a bad relay in the fuel on/off system? Or is there no relay? I thank you for all the assistance so far.
Mechanic: Wayne, Journeyman replied 4 years ago

Hi

Thank you for the response

I understand a bad week, Tractor was the least of your problems

I will check in the parts book and get back to you

Wayne

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Customer reply replied 4 years ago
Will check in the morning. Thank you.
Mechanic: Wayne, Journeyman replied 4 years ago

OK

Thank you

Wayne

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Mechanic: Wayne, Journeyman replied 4 years ago
MorningJust following up with youDid my answer help you ??Wayne
Wayne
Wayne, Journeyman
Category: Agriculture and Farm Equipment
Satisfied Customers: 17,945
Experience: 34 + years as a mechanic
Verified
Wayne and 87 other Agriculture and Farm Equipment Specialists are ready to help you
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Wayne
Wayne
Wayne, Journeyman
Category: Agriculture and Farm Equipment
Satisfied Customers: 17,945
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